nyuuzyou/wikis huggingface dataset:
Digital radiography

== Description ==
Digital radiography is a form of X-ray radiography, where linear (array) or 2D (matrix) digital detectors are used instead of traditional radiographic films. Advantages include time efficiency through bypassing chemical processing and the ability to digitally transfer and enhance images. Also less radiation dose (and thus lower exposure time) can be used to produce an image of similar contrast to conventional radiography.
Digital radiography can be subdivided in three different techniques, according to the type of detector:
-	Imaging Plate (IP)
-	Flat Panel Detector (FPD)
-	Linear Diode Array (LDA)
These three detectors permit to obtain directly a digital image, give advantages of immediate image preview and availability, elimination of film processing steps (economy of time & cost), a potential wider dynamic range, as well as the ability to apply dedicated image processing techniques like contrast enhancement, filtration, zoom, pattern recognition, combination with images obtained by other techniques (visible, IR or UV fluorescence photography…)…
However, the high definition (low speed) classical industrial radiographic films permit yet to obtain radiographs with better intrinsic resolving power & radiographic image quality.
Digital radiography should not be confused with radioscopy, where there is a continuous beam of radiation, and the images appear on a video monitor, where the radiographic image of the object being examined is viewed in real time.
== Synonyms and related terms ==
radiographie numérique (Fr.)
== Resources and Citations ==
* R.H.Bossi, F. Iddings, G.C. Wheeler, P.O. Moore, Nondestructive testing handbook, vol 4, Radiographic testing, 3rd edition, Columbus OH, ASNT, (2002) 
* http://en.wikipedia.org/wiki/Digital_radiography
* http://en.wikipedia.org/wiki/Computed_radiography
Category:Materials database
Digital versatile disc

== Description ==
A type of optical disk capable of storing up to 4.7 gigabytes of digital information. The digital videodisc, or DVD, was originally developed in 1995 by Philips Electronics and Sony Corporation. More recently, its name has been changed to digital versatile disc because it can reproduce not only high definition video images but other types of digital data as well. The DVD is composed of a flat, circular, polycarbonate substrate (12 cm diameter, 1.2 mm thick) coated with a reflective aluminum layer and a thin acrylic lacquer. The acrylic coating protects the metal from abrasion and corrosion. While the DVD's are physically the same dimensions as compact discs (CD), they are not interchangeable because the information is recorded differently. The DVD player uses a high-power red laser that has a finer focus point than that of the CD player. This laser allows smaller pits and narrower separation tracks thus providing the DVD's greater storage capacity.
== Synonyms and Related Terms ==
DVD; digital versatile disk; digital videodisc; digital video disc; optical disk
==Resources and Citations==
* Encyclopedia Britannica, http://www.britannica.com Comment: "Compact Disc." Accessed 11 Sep, 2003 .
Category:Materials database
Digitisation

== Description ==
A process dedicated to transform classical photographs (analogic ones) in digitised images. This is done using a scanner, generally based on a light array detector, coupled with an acquisition system and a computer. The parameters are the definition in pixels by unit surface (for instance 1000 x 1000 pixels / cm2) and the coding precision (for instance 8 bits, 12 bits, 24 bits...).
== Synonyms and related terms ==
digitization; numérisation (Fr.);
Category:Materials database
Diisobutyl ketone

== Description ==
A colorless, liquid used as a slow-drying solvent for cellulose nitrate and other synthetic resins in coating and lacquer operations. Diisobutyl ketone is also used as a solvent for inks and stains.
[[[SliderGallery rightalign|diisobutyl ketone.jpg~Chemical structure]]]
== Synonyms and Related Terms ==
DIBK; di-iso-butyl ketone; 2,6-dimethyl-4-heptanone;isovalerone
== Hazards and Safety ==
* Toxic. 
* Combustible. Flash point=49C (120F) 
* Millipore Sigma: SDS
==Physical and Chemical Properties==
Miscible with most organic solvents. Immiscible with water.
Composition 	C9H18O
CAS 	108-83-8
Melting Point 	-41.5 C
Density 	0.8089 g/ml
Molecular Weight	mol. wt. = 142.24
Boiling Point 	168.1 C
==Resources and Citations==
* Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
Category:Materials database
Diketo-pyrrolo pyrrole dye

== Description ==
A small group of synthetic organic dyes discovered in the early 1980s. Diketo-pyrrolo pyrrole (DPP) dyes have very good lightfastness. They are used in printing inks, pens and markers.
[[[SliderGallery rightalign|P071 Cromophthal DPP Orange.PNG~FTIR PO71(MFA)|PO73 Irgazine Orange DPP-RA.TIF~FTIR PO73(MFA)|PR254 Diketopyrrolo-pyrole red.PNG~FTIR PR254(MFA)|PR255 Irgazin DPP Scarlet EK.PNG~FTIR PR255(MFA)|PR264 Irgazin DPP Rubine TR.TIF~FTIR PR264(MFA)|pyrroleorange632.jpg~Raman|pyrroleyellow632.jpg~Raman]]]
== Synonyms and Related Terms ==
DPP pigments; Pigment Red 254; pyrrole orange; pyrrole yellow
== Comparisons ==
Pigment number	Manufacture	Pigment name 	Manufacture CI number	Comments
PO071 	unknown 	cromophtal DPP orange 	unknown 	
PO073 	unknown 	irgazine orange DPP-RA 	unknown 	
PR254 	unknown 	diketo-pyrrolo pyrrole red	unknown 	
PR255 	unknown 	irgazin DPP scarlet EK 	unknown 	
PR264 	unknown 	irgazin DPP rubine TR 	unknown 	
==Resources and Citations==
* Website: www.handprint.com
Category:Materials database
Diluent

== Description ==
An inert material used to decrease the concentration of an active component. A diluent may be a solvent used to decrease the concentration or viscosity of a coating or paint. Also a diluent may be an inert filler added to an adhesive or pigment as a bulking agent to increase workability or just to decrease cost. For example, sand is added to cement as a diluent and turpentine is a diluent in oil paints. Water is the most common diluent. 
See also extender, filler, and thinner.
== Synonyms and Related Terms ==
thinner; thinning agent; filler; extender; adulterant
==Resources and Citations==
* R. J. Gettens, G.L. Stout, Painting Materials, A Short Encyclopaedia, Dover Publications, New York, 1966
* Ralph Mayer, A Dictionary of Art Terms and Techniques, Harper and Row Publishers, New York, 1969 (also 1945 printing)
* Theodore J. Reinhart, 'Glossary of Terms', Engineered Plastics, ASM International, 1988
* Matt Roberts, Don Etherington, Bookbinding and the Conservation of Books: a Dictionary of Descriptive Terminology, U.S. Government Printing Office, Washington DC, 1982
Category:Materials database
Dimensional stability

== Description ==
The property of a material that resists any change in its physical size. Dimensional changes for some materials, such as fabric, wood or paper board, may be due to moisture absorption, heat or time. Dimensional stability of paper is important in the printing process for the correct registration of multiple colors.
== Synonyms and Related Terms ==
Formstabilität (Deut.); stabilité dimentionnelle (Fr.);
Category:Materials database
Dimethoxane

== Description ==
A transparent liquid with a mustard-like odor. Dimethoxane is used as a preservative in gasoline, mineral oils, resin emulsions, inks, and water-based paints.
== Synonyms and Related Terms ==
2,6-dimethyl-1,3-dioxan-4-ol acetate; acetomethoxane; Dioxin (obsolete tradename)
==Risks==
* Loveland Products: SDS
==Physical and Chemical Properties==
Miscible with water and most organic solvents.
Composition 	C8H14O4
CAS 	828-00-2
Density 	1.0655 g/ml
Molecular Weight	mol. wt. = 174.19
Refractive Index	1.4310
Boiling Point 	74-75 C
==Resources and Citations==
* The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 3214
Category:Materials database
Dimethyl sulfide

== Description ==
A colorless, foul-smelling liquid that is produced in kraft pulping black liquor. Dimethyl sulfide is used as a solvent for many mineral salts that are insoluble in water.
== Synonyms and Related Terms ==
methyl sulfide; thiobismethane; 2-thiapropane; dimethyl monosulfide; dimethyl sulphide (Br.); dimethylsulfide; DMS; methyl sulphide (Br.); methyl thioether
== Risks ==
* Highly flammable, moderate explosion risk. Flash point = -37C (-35F) 
* Evolves sulfur dioxide when heated. 
* Contact is very irritating. Inhalation and Ingestion may be harmful. 
* Fisher Scientific: MSDS
==Physical and Chemical Properties==
Soluble in ethanol and ether. Insoluble in water.
Composition 	C2H6S
CAS 	75-18-3
Melting Point 	-83 C
Density 	0.846 g/ml
Molecular Weight	mol. wt. = 62.13
Boiling Point 	36.2 C
==Resources and Citations==
* Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
* The Dictionary of Paper, American Paper Institute, New York, Fourth Edition, 1980
* The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 6204
Category:Materials database
Dimethyl sulfoxide

== Description ==
A dense, odorless, colorless liquid used as a solvent and a methylating agent. Dimethyl sulfoxide is obtained as a byproduct from the sulfite pulping paper making procedure. DMSO is used in paint and varnish removers. It is also used in the production of acrylonitrile fibers.
[[[SliderGallery rightalign|aaiDMSO.jpg~FTIR|dimethyl sulfoxide.jpg~Chemical structure]]]
== Synonyms and Related Terms ==
DMSO; dimethylsulfoxide; methylsulfoxide; sulfinylbismethane
== Risks ==
* Combustible. Flash point= 89C (192F) 
* Vapors and liquid may be absorbed through the skin causing irritation. 
* ThermoFisher: SDS
==Physical and Chemical Properties==
Soluble in water, ethanol, benzene, acetone, chloroform.
Composition 	(CH3)2SO
CAS 	67-68-5
Melting Point 	18.5 C
Density 	1.092 g/ml
Molecular Weight	mol. wt. = 78.13
Refractive Index	1.476
Boiling Point 	188 C
== Comparisons ==
==Resources and Citations==
* Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
* The Dictionary of Paper, American Paper Institute, New York, Fourth Edition, 1980
* The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983
* CRC Handbook of Chemistry and Physics, Robert Weast (ed.), CRC Press, Boca Raton, Florida, v. 61, 1980 Comment: ref. index=1.476
Category:Materials database
Dimethyl terephthalate

== Description ==
A colorless, crystalline compound used in the production of polyethylene terephthalate (polyester) resins, fibers, and films.
[[[SliderGallery rightalign|dimethyl terephthalate.jpg~Chemical structure]]]
== Synonyms and Related Terms ==
DMT; dimethyl p-phthalate; dimethyl 1,4-benzenedicarboxylate; dimethyl ester of terephthalic acid
== Risks ==
* Mild irritant. 
* Combustible. Flash point = 153 C 
* ThermoFisher: SDS
==Physical and Chemical Properties==
Insoluble in water, chloroform, ether, acetic acid. Soluble in hot ethanol, ether and alkalis.
Composition 	C6H4(COOCH3)2
CAS 	120-61-6
Melting Point 	140.6 C
Density 	1.2 g/ml
Molecular Weight	mol. wt. = 194.2
Boiling Point 	288 C
==Resources and Citations==
* The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 9306
* Hoechst Celanese Corporation, Dictionary of Fiber & Textile Technology (older version called Man-made Fiber and Textile Dictionary, 1965), Hoechst Celanese Corporation, Charlotte NC, 1990
Category:Materials database
Dimethyldichlorosilane

== Description ==
Clear, colorless liquid with a sharp irritating odor of hydrogen chloride. It has been used as a pesticide and biocide.
[[[SliderGallery rightalign|dimethyldichlorosilane.jpg~Chemical structure]]]
== Synonyms and Related Terms ==
DMDCS; dimethyldichlorosilane; Inerton
== Risks ==
* Toxic by ingestion. 
* Corrosive. 
* Inhalation and contact will produce burns. 
* Extremely flammable. Flash point = -3C (27F). 
* Reacts violently with water producing toxic hydrogen chloride fumes. 
* ThermoFisher: SDS
==Physical and Chemical Properties==
Composition 	(CH3)2SiCl2
CAS 	75-78-5
Melting Point 	-86 C
Density 	1.064 g/ml
Molecular Weight	mol. wt.=129.07
Boiling Point 	70 C
Category:Materials database
Dimethylformamide

== Description ==
A clear, toxic liquid that is considered a universal solvent since it is miscible in both water and organic solvents. Dimethylformamide (DMF) dissolves most natural and synthetic resins, and, with heat and time, DMF will even soften epoxy. It is often used in liquid chromatographic systems as a gradient intermediate between polar and nonpolar solvents. DMF is also used in some commercial paint stripping formulations.
[[[SliderGallery rightalign|dimethylformamide.jpg~Chemical structure]]]
== Synonyms and Related Terms ==
DMF; DMFA; n,n-dimethyl formamide
== Risks ==
* Carcinogenic. 
* Overexposure may cause vomiting, liver damage and high blood pressure. 
* Irritant to skin. 
* Combustible; moderate fire risk. Flash point = 58C 
* Toxic by inhalation, ingestion and skin absorption. 
* Greenfield: SDS
==Physical and Chemical Properties==
Miscible with water and most common organic solvents.
Composition 	HCON(CH3)2
CAS 	68-12-2
Melting Point 	-61 C
Density 	0.9445 g/ml
Molecular Weight	mol. wt. = 73.09
Boiling Point 	153 C
== Comparisons ==
==Resources and Citations==
* The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 9232
* Hermann Kuhn, Conservation and Restoration of Works of Art and Antiquities, Butterworths, London, 1986
Category:Materials database
Dimethylglyoxime

== Description ==
Transparent triclinic crystals used in a colorimetric reagent to detect trace amounts of nickel, copper, cobalt, or bismuth (Odegaard et al 2000). Dimethylglyoxime reacts with soluble nickel to produce a bright red precipitate. Copper produces a blue precipitate, cobalt gives a brown, and bismuth forms a bright yellow.
[[[SliderGallery rightalign|dimethylglyoxime.jpg~Chemical structure]]]
== Synonyms and Related Terms ==
2,3-butanedionedioxime; 2,3-diisonitrosobutane; diacetyldioxime
== Risks ==
* Harmful by ingestion. 
* Contact may cause irritation. 
* Fisher Scientific; SDS
==Physical and Chemical Properties==
Insoluble in water. Soluble in alcohol, ether, pyridine, acetone.
Solution (0.01N): Dissolve 0.6 g dimethylglyoxime in 500 ml of 95% ethyl alcohol.
Composition 	C4H8N2O2
CAS 	95-45-4
Melting Point 	238-240 C
Molecular Weight	mol. wt. = 116.12
==Resources and Citations==
* The Merck Index, Susan Budavari (ed.), Merck Research Labs, Whitehouse Station, NJ, 12th Edition, 1996 Comment: entry 3240
* N.Odegaard, S.Carroll, W.Zimmt, Material Characterization Tests for Objects of Art and Archaeology, Archetype Publications, London, 2000, p.80.
* CRC Handbook of Chemistry and Physics, Robert Weast (ed.), CRC Press, Boca Raton, Florida, v. 61, 1980 Comment: Solution (0.01N): Dissolve 0.6 g dimethylglyoxime in 500 ml of 95% ethyl alcohol.
* Sigma Dyes, Stains and Natural Pigments, Infrared Library, Nicolet, 1991-1995 Comment: OMNIC: formula= C4H8N2O2, CAS= 95-45-4
Category:Materials database
Dimethylhydrazine

== Description ==
A colorless, flammable, hygroscopic liquid that reacts with water and moisture to produce heat. The principal use of dimethylhydrazine is as the base in rocket fuel formulations, but it is also found in some photographic developing solutions.
[[[SliderGallery rightalign|dimethylhydrazine.jpg~Chemical structure]]]
== Synonyms and Related Terms ==
1,1-dimethylhydrazine; n,n-dimethylhydrazine
== Risks ==
* Toxic by ingestion, inhalation and skin absorption. 
* Suspected carcinogen. 
* Exposure may cause skin irritation, choking, nausea, convulsions and liver injury. 
* Highly flammable. Flash point = -15C. Vapors are explosive. 
* Decomposes to produce toxic gases. 
* Millipore Sigma: SDS
==Physical and Chemical Properties==
Soluble in water and ethanol.
Composition 	(CH3)2NNH2
CAS 	57-14-7
Melting Point 	-58 C
Density 	0.782 g/ml
Molecular Weight	mol. wt. = 60.1
Boiling Point 	63 C
==Resources and Citations==
* The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 3297
* Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
Category:Materials database
Dimity

== Description ==
A thin sheer cotton fabric. Dimity is often printed with checks or stripes. It is used for dresses, aprons, curtains, and infants clothing.
== Synonyms and Related Terms ==
dimiet, diemet (katoenenstof met ingeweven patroon) (Ned)
==Resources and Citations==
* Art and Architecture Thesaurus Online, https://www.getty.edu/research/tools/vocabulary/aat/, J. Paul Getty Trust, Los Angeles, 2000
* Edward Reich, Carlton J. Siegler, Consumer Goods: How to Know and Use Them, American Book Company, New York City, 1937
* Website: www.fabrics.net
Category:Materials database
Dingler's green

== Description ==
An early variety of chromium oxide green.
==Resources and Citations==
R. Newman, "Chromium Oxide Greens", Artists Pigments, Volume 3, E. West FitzHugh (ed.), Oxford University Press: Oxford, 1997.
* Ralph Mayer, A Dictionary of Art Terms and Techniques, Harper and Row Publishers, New York, 1969 (also 1945 printing)
Category:Materials database
Dinitrile fiber

== Description ==
A resilient, synthetic fiber that can withstand high temperatures and outdoor exposure. Dinitrile is made into a soft, deep piled fabric and used for sweater, suits and coats. It is also used to make imitation fur.
== Synonyms and Related Terms ==
vinylidene nitrile; dinitrile fibre (Br.); Darlan [B.F.Goodrich]
==Resources and Citations==
* Thomas Gregory, The Condensed Chemical Dictionary, Reinhold Publishing, New York, 3rd ed., 1942
Category:Materials database
Dinitroaniline orange

== Description ==
An azo-type organic colorant prepared by combining beta naphthol with 2,4-dinitroaniline. Dinitroaniline orange was first patented in 1909. It has good resistance to fading but may darken with time. Dinitroaniline orange is used for textile printing, architectural paints, plastic, printing inks and some artists' paints.
== Synonyms and Related Terms ==
Pigment Orange 3; Orthonitroaniline orange; CAS No. 6410-15-7
== Risks ==
* May bleed in paint solvents.
* Guide Chem: SDS
==Physical and Chemical Properties==
Resistant to alkalis.
==Resources and Citations==
* B.Berrie, S.Q.Lomax, "Azo Pigments: Their History, Synthesis, Properties and Use in Artists' Materials" in Studies in the History of Art, No.57, National Gallery of Art, Washington DC, 1997.
* Guy Weismantel, Paint Handbook, McGraw-Hill Book Company, New York, 1981
Category:Materials database
Dinitrobenzene, ortho

== Description ==
Flat, prismatic crystals. Dinitrobenzene was discovered in 1841 by Sainte Claire Deville. It is prepared from benzene treated with sulfuric acid and fuming nitric acid.
[[[SliderGallery rightalign|dinitrobenzene, ortho.jpg~Chemical structure]]]
== Synonyms and Related Terms ==
1,3-dinitrobenzene
== Risks ==
* Toxic by ingestion. 
* Contact cause burns and irritation. 
* Fisher Scientific: MSDS
==Physical and Chemical Properties==
Soluble in ether, benzene, chloroform, ethyl acetate, and hot alcohol
Composition 	C6H4(NO2)2
CAS 	99-65-0
Melting Point 	118 C
Density 	1.57 g/ml
Molecular Weight	mol. wt. = 168.11
Boiling Point 	319 C
==Resources and Citations==
* The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry #3273; bp=319 C, mp = 118C, density = 1.57
* MSDS Sheet Comment: Fisher Scientific; bp = 88-90C, mp= 297 C, density 1.36
* F. Crace-Calvert, Dyeing and Calico Printing, Palmer & Howe, London, 1876 Comment: p. 356
Category:Materials database
Dinitrophenol

== Description ==
A yellow crystalline material used in the manufacture of sulfur dyes and photographic developer. Dinitrophenol is a chromotropic pH indicator that is colorless below pH 2.6 and yellow above pH 4.4. It is also used as a wood preservative, an insecticide, and a reagent for the detection of potassium and ammonium ions.
[[[SliderGallery rightalign|dinitrophenol.jpg~Chemical structure]]]
== Synonyms and Related Terms ==
2,4-dinitrophenol; alpha-dinitrophenol; dinitrophenol (Fr.); Aldifen
== Risks ==
* Combustible. Explosion hazard when dry. 
* Highly toxic by skin absorption, ingestion and inhalation. 
* Millipore Sigma: SDS
==Physical and Chemical Properties==
Soluble in ethanol, ether, benzene and chloroform. Slightly soluble in water.
Composition 	C6H3OH(NO2)2
CAS 	51-28-5
Melting Point 	112-114 C
Density 	1.683 g/ml
Molecular Weight	mol. wt.=184.11
==Resources and Citations==
* The Merck Index, Susan Budavari (ed.), Merck Research Labs, Whitehouse Station, NJ, 12th Edition, 1996
* Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
Category:Materials database
Dioctyl phthalate

== Description ==
A light-color liquid commonly called bis(2-ethylhexyl)phthalate. Dioctyl phthalate is used as a plasticizer in cellulose acetate, cellulose acetate butyrate, polystyrene, vinyl chloride, and vinyl chloride acetate polymers. Polymers may contain DOP in concentrations of 1-40%. The European Commission has banned the use of many phthalates, including DOP, in PVC toys.
[[[SliderGallery rightalign|aaiDOP.jpg~FTIR|dioctyl phthalate.jpg~Chemical structure]]]
== Synonyms and Related Terms ==
DOP; DEHP; di(2-ethylhexyl) phthalate; bis (2-ethylhexyl) phthalate; di-2-ethyl hexyl phthalate
== Risks ==
* Suspected carcinogen. 
* Irritant to eyes, nose, lungs, and skin. 
* Combustible. Flash point = 215 C 
* Millipore Sigma: SDS
==Physical and Chemical Properties==
Miscible in mineral oil. Insoluble in water.
Composition 	C24H38O4
CAS 	117-81-7
Melting Point 	-50 C
Density 	0.9861 g/ml
Molecular Weight	mol. wt. = 390.5
Boiling Point 	231 C
==Resources and Citations==
* The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 1291
Category:Materials database
Diopside

== Description ==
A green, calcium magnesium silicate mineral sometimes used as a gemstone. Diopside is a pyroxene type mineral with short, monoclinic crystals. The transparent to translucent crystals have either a square or octagonal cross section. The color of diopside crystals usually from light to dark green, but may be blue, brown, colorless or pale violet. Diopside has been found at many locations throughout Europe (Russia, Finland, Sweden, Switzerland and Italy), Canada (Ontario, Quebec) and the United States (New York, California and Maine). Powdered diopside is used as a matting agent in ceramic glazes.
== Synonyms and Related Terms ==
calcium magnesium silicate; diopside (Fr.); diópsido (Esp., Port.); Diposid (Deut.); diopsiet (Ned.)
[[[SliderGallery rightalign|DIOPSIDE PMA.TIF~FTIR (PMA)|Diopsideitaly1.jpg~Raman (U of Parma)]]]
==Physical and Chemical Properties==
* Monoclinic system with slender square or octagonal prisms that are often twinned 
* Cleavage occurs at intersecting angles of 87 and 93 degrees
* Fracture = uneven to conchoidal
* Luster = vitreous to dull 
* Streak = white, gray or green
* Fluorescence = green in LW; inert in SW
* Pleochroism = weak to strong; light and dark green
* Dispersion = weak to distinct
Composition 	CaMgSi2O6
Mohs Hardness 	5.5 - 6.5
Density 	3.2-3.6 g/ml
Refractive Index	1.66-1.73
Birefringence 	0.024 - 0.030
==Resources and Citations==
* Mineralogy Database: Diopside
* Gem Identification Lab Manual, Gemological Institute of America, 2016.
* Robert Fournier, Illustrated Dictionary of Practical Pottery, Chilton Book Company, Radnor, PA, 1992
* Encyclopedia Britannica, http://www.britannica.com Comment: "diopside" [Accessed December 4, 2001]. (tech info)
* C.W.Chesterman, K.E.Lowe, Audubon Society Field Guide to North American Rocks and Minerals, Alfred A. Knopf, New York, 1979
* Wikipedia: Diopside (Accessed Sept. 7, 2005 and Dec 2022)
* Van Nostrand's Scientific Encyclopedia, Douglas M. Considine (ed.), Van Nostrand Reinhold, New York, 1976
* The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998
Category:Materials database