nyuuzyou/wikis huggingface dataset:
Hagi (Lespedeza bicolor) - left (155 L)

[[[SliderGallery rightalign|Uemura_06-18-2009_155.jpg~Normal]]]{| class="wikitable"
|-	
! scope="row"|Museum number
| 155
|-	
! scope="row"|Uemura number / title
| ; "Haze-some 25"
|-	
! scope="row"|Folder location
| 2nd shelf
|-	
! scope="row"|Sample location
| left (155 L)
|-	
! scope="row"|Fiber type
| silk
|-	
! scope="row"|Color
| dark brown
|-	
! scope="row"|Dyestuff (Japanese common name)
| 萩 : Hagi
|-	
! scope="row"|Dye (English common name)
| Bush Clover
|-	
! scope="row"|Dyestuff (botanical name)
| Lespedeza bicolor Turcz. (L. bicolor var. japonica Nakai)
|-	
! scope="row"|Plant part
| leaf + stem /dried (?)
|-	
! scope="row"|Dyestuff extraction
| boiled in water
|-	
! scope="row"|Auxiliary agent in dye bath
| -
|-	
! scope="row"|Mordant
| iron
|-	
! scope="row"|Other auxiliary agent
| -
|-	
! scope="row"|Uemura's date
| Kyoto
|}
Category:Uemura dye archive
Hagi (Lespedeza bicolor) - right (155 R)

[[[SliderGallery rightalign|Uemura_06-18-2009_155.jpg~Normal]]]{| class="wikitable"
|-	
! scope="row"|Museum number
| 155
|-	
! scope="row"|Uemura number / title
| ; "Haze-some 25"
|-	
! scope="row"|Folder location
| 2nd shelf
|-	
! scope="row"|Sample location
| right (155 R)
|-	
! scope="row"|Fiber type
| silk
|-	
! scope="row"|Color
| ochre
|-	
! scope="row"|Dyestuff (Japanese common name)
| 萩 : Hagi
|-	
! scope="row"|Dye (English common name)
| Bush Clover
|-	
! scope="row"|Dyestuff (botanical name)
| Lespedeza bicolor Turcz. (L. bicolor var. japonica Nakai)
|-	
! scope="row"|Plant part
| leaf + stem /dried (?)
|-	
! scope="row"|Dyestuff extraction
| boiled in water
|-	
! scope="row"|Auxiliary agent in dye bath
| -
|-	
! scope="row"|Mordant
| lime
|-	
! scope="row"|Other auxiliary agent
| -
|-	
! scope="row"|Uemura's date
| Kyoto
|}
Category:Uemura dye archive
Hair

== Description ==
Cylindrical filaments that grow from the skin of mammals. Hair is a column of overlapping, fused cells that are composed of the protein keratin. Hair is composed of three parts: the innermost column is the medula, the surrounding live cells (the cortex) contain pigment, and the outermost dead transparent cells are the cuticular scales. Hair grows from follicles embedded in the skin. The portion of the hair outside of the skin is called the shaft. Fine, closely spaced hair that covers most of an animal's body is called fur. Dense, soft, curled hair is called wool. Coarse, stiff hairs are called bristles, spines, or quills. Horsehair and cattle hair have been used for brushes, plaster binders, haircloth, and upholstery stuffing. Rabbit hair, often called rabbit fur, has been used to make felt hats.
== Synonyms and Related Terms ==
pelage; medula; cortex; cuticular scales; hår (Dan., Nor., Sven.); Haar (Deut., Ned.); pelo (Esp.); pilosité humaine (Fr.); cabelo (Port.);
[[[SliderGallery rightalign|aaiHAIR.jpg~FTIR]]]
== Physical and Chemical Properties ==
Human hair is strong (one strand can hold 100g)
== Additional Images ==
File:00000096.jpg|Drawing of various hair types
File:1 Mongoloid hair 200X.jpg|Mongoloid hair
File:1 Mongoloid hair 200X pol.jpg|Mongoloid hair
File:hairshaft1large.jpg|Hair shaft
== Resources and Citations ==
* Walter C. McCrone, John Gustave Delly, The Particle Atlas, W. McCrone Associates, Chicago, IV, 1972
* Matt Roberts, Don Etherington, Bookbinding and the Conservation of Books: a Dictionary of Descriptive Terminology, U.S. Government Printing Office, Washington DC, 1982
* Encyclopedia Britannica, http://www.britannica.com Comment: "hair." (Accessed 17 Nov. 2004).
* Olympus Microscopy Resource Center at http://www.olympusmicro.com/galleries/abramowitz/pages/hairshaft1large.html
* Wikipedia: http://en.wikipedia.org/wiki/Hair (Accessed Nov. 2, 2005)
* G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971
* Van Nostrand's Scientific Encyclopedia, Douglas M. Considine (ed.), Van Nostrand Reinhold, New York, 1976
* Random House, Webster's Encyclopedic Unabridged Dictionary of the English Language, Grammercy Book, New York, 1997
* The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998
Category:Materials database
Hair hygrometer

== Description ==
A hygrometer that measures humidity based on the changes in the length of a human hair as it absorbs and desorbs moisture. Hair is hygroscopic and when mounted under tension, it expands and contracts with changes in relative humidity. One end of a set of hair strands is fixed and the other is used to control a pointing device or a recording pen. Hair hygrometers work well over the relative humidity range of 20-100%. However, the changes are slow and the response lag time increases at cooler temperatures. Hair hygrometers are relatively inexpensive, but should be calibrated every two to three months with a psychrometer.
== Synonyms and Related Terms ==
Haarhygrometer (Deut.), Fadenhygrometer (Deut.); hygromètre à cheveu (Fr.); higrómetro de cabelo (Port.)
Category:Materials database
Hair sheep

== Description ==
Several types of wild sheep that have straight hair rather than curly wool. Hair sheep, though classified as sheep, visually resemble goats and are found in the mountainous regions of India, China, South America, and Africa. Leather produced from hair sheep is very soft and kid-like. It is called cabretta leather. The soft white hair from sheep is used in hake brushes.
== Synonyms and Related Terms ==
sheep hair; cabretta leather; pelo de cabra salvaje (Esp.); schapenhaar (Ned);
==Resources and Citations==
* 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
Haircloth

== Description ==
A thick, coarse fabric that usually contains a cotton warp woven with horsehair filling fibers. The horsehair is obtained from the manes and tails of horses and may be up to 30 inches in length. Haircloth is stiff, but resilient, and was used as interlining material for clothing and upholstery. It use has been superseded by synthetic fabrics in recent years.
== Synonyms and Related Terms ==
cilice; haardoek (Ned); haarweefsel (Ned);
==Resources and Citations==
* G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 387
* Fairchild's Dictionary of Textiles, Phyllis G.Tortora, Robert S. Merkel (eds.), Fairchild Publications, New York City, 7th edition, 1996
* Encyclopedia Britannica, http://www.britannica.com Comment: "horsehair." Accessed 17 Nov. 2004 . (horsehair).."The fabric, at one time made into shirts worn by religious penitents, became a popular upholstery material in the 19th century."
* Random House, Webster's Encyclopedic Unabridged Dictionary of the English Language, Grammercy Book, New York, 1997
* The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998
Category:Materials database
Haji

== Description ==
The Japanese name for a traditional Japanese yellow colorant obtained from the Japanese wax tree, (Rhus succedanea). The major colorant in haji is fustin. The wax tree is primarily cultivated for the wax from its berries (see Japan wax) and for its sap which forms a natural lacquer (see urushi).
== Synonyms and Related Terms ==
haze (Jap.); Rhus succedanea
==Resources and Citations==
* R.Feller, M.Curran, C.Bailie, 'Identification of Traditional Organic Colorants Employed in Japanese Prints and Determination of their Rates of Fading', Japanese Woodblock Prints, Allen Memorial Art Museum, Oberlin College, Oberlin, 1984
* Encyclopedia Britannica, http://www.britannica.com Comment: "Rhus" [Accessed March 5, 2002].
Category:Materials database
Hake brush

== Description ==
A wide, flat brush with soft white bristles. Hake brushes are typically made with sheep hair set in a wooden handle. They are used for dusting.
== Synonyms and Related Terms ==
Oriental brush
==Resources and Citations==
* Preserv'Art at http://preservart.ccq.mcc.gouv.qc.ca/ProduitFiche.aspx?NoProduit=P0267
* F. Kidd, Brushmaking Materials, British Brush Manufacturers, London, 1957
* Zora Sweet Pinney, 'A Handle on the Terms used for Artists' Brushes', unpublished glossary, 1999
Category:Materials database
Hakobe (Chickweed) - left (373 L)

[[[SliderGallery rightalign|Uemura_10-15-2009_373.jpg~Normal]]]{| class="wikitable"
|-	
! scope="row"|Museum number
| 373
|-	
! scope="row"|Uemura number / title
| ; "Haze-some 25"
|-	
! scope="row"|Folder location
| 5th shelf
|-	
! scope="row"|Sample location
| left (373 L)
|-	
! scope="row"|Fiber type
| silk
|-	
! scope="row"|Color
| white
|-	
! scope="row"|Dyestuff (Japanese common name)
| ハコベ : Hakobe
|-	
! scope="row"|Dyestuff (English common name)
| Chickweed
|-	
! scope="row"|Dyestuff (botanical name)
| Stellaria neglecta Weihe (S. media (L.) Vill. var. procera Klett et Richt.)
|-	
! scope="row"|Plant part
| leaf, stem / unspecified
|-	
! scope="row"|Dyestuff extraction
| boiled in water
|-	
! scope="row"|Auxiliary agent in dye bath
| -
|-	
! scope="row"|Mordant
| lime
|-	
! scope="row"|Other auxiliary agent
| -
|-	
! scope="row"|Uemura's notes
| The plant was found to be not suitable for dyeing. The actual use of this plant for dyeing is unknown. According to Mr. Shoichi Gotoh (), the colorant obtained from the plant was supposed to be used for making a fabric blue during bleaching.
|-	
! scope="row"|Uemura's date
| Kyoto
|}
Category:Uemura dye archive
Hakobe (Chickweed) - right (373 R)

[[[SliderGallery rightalign|Uemura_10-15-2009_373.jpg~Normal]]]{| class="wikitable"
|-	
! scope="row"|Museum number
| 373
|-	
! scope="row"|Uemura number / title
| ; "Haze-some 25"
|-	
! scope="row"|Folder location
| 5th shelf
|-	
! scope="row"|Sample location
| right (373 R)
|-	
! scope="row"|Fiber type
| silk
|-	
! scope="row"|Color
| beige
|-	
! scope="row"|Dyestuff (Japanese common name)
| ハコベ : Hakobe
|-	
! scope="row"|Dyestuff (English common name)
| Chickweed
|-	
! scope="row"|Dyestuff (botanical name)
| Stellaria neglecta Weihe (S. media (L.) Vill. var. procera Klett et Richt.)
|-	
! scope="row"|Plant part
| leaf, stem / unspecified
|-	
! scope="row"|Dyestuff extraction
| boiled in water
|-	
! scope="row"|Auxiliary agent in dye bath
| -
|-	
! scope="row"|Mordant
| iron
|-	
! scope="row"|Other auxiliary agent
| -
|-	
! scope="row"|Uemura's notes
| The plant was found to be not suitable for dyeing. The actual use of this plant for dyeing is unknown. According to Mr. Shoichi Gotoh (), the colorant obtained from the plant was supposed to be used for making a fabric blue during bleaching.
|-	
! scope="row"|Uemura's date
| Kyoto
|}
Category:Uemura dye archive
Hakubaika (Plum tree) - left (389 L)

[[[SliderGallery rightalign|Uemura_10-15-2009_389.jpg~Normal]]]{| class="wikitable"
|-	
! scope="row"|Museum number
| 389
|-	
! scope="row"|Uemura number / title
| ; "Haze-some 25"
|-	
! scope="row"|Folder location
| 5th shelf
|-	
! scope="row"|Sample location
| left (389 L)
|-	
! scope="row"|Fiber type
| silk
|-	
! scope="row"|Color
| white
|-	
! scope="row"|Dyestuff (Japanese common name)
| 白梅花 : Hakubaika
|-	
! scope="row"|Dye (English common name)
| plum tree with white flower
|-	
! scope="row"|Dyestuff (botanical name)
| Armeniaca mume (Siebold et Zucc.) de Vriese (Prunus mume Siebold et Zucc.)
|-	
! scope="row"|Plant part
| flower / fresh (?)
|-	
! scope="row"|Dyestuff extraction
| boiled in water
|-	
! scope="row"|Auxiliary agent in dye bath
| -
|-	
! scope="row"|Mordant
| lime
|-	
! scope="row"|Other auxiliary agent
| -
|-	
! scope="row"|Uemura's notes
| The fabric was alternately soaked into dye bath and mordant bath for several times. The resultant color eventually discolored into dull beige.
|-	
! scope="row"|Uemura's date
| Kyoto
|}
Category:Uemura dye archive
Hakubaika (Plum tree) - right (389 R)

[[[SliderGallery rightalign|Uemura_10-15-2009_389.jpg~Normal]]]{| class="wikitable"
|-	
! scope="row"|Museum number
| 389
|-	
! scope="row"|Uemura number / title
| ; "Haze-some 25"
|-	
! scope="row"|Folder location
| 5th shelf
|-	
! scope="row"|Sample location
| right (389 R)
|-	
! scope="row"|Fiber type
| silk
|-	
! scope="row"|Color
| lemon yellow
|-	
! scope="row"|Dyestuff (Japanese common name)
| 白梅花 : Hakubaika
|-	
! scope="row"|Dye (English common name)
| plum tree with white flower
|-	
! scope="row"|Dyestuff (botanical name)
| Armeniaca mume (Siebold et Zucc.) de Vriese (Prunus mume Siebold et Zucc.)
|-	
! scope="row"|Plant part
| flower / fresh (?)
|-	
! scope="row"|Dyestuff extraction
| boiled in water
|-	
! scope="row"|Auxiliary agent in dye bath
| -
|-	
! scope="row"|Mordant
| lime
|-	
! scope="row"|Other auxiliary agent
| -
|-	
! scope="row"|Uemura's notes
| The fabric was soaked into: 1) dye bath; and 2) mordant bath; then air dried.
|-	
! scope="row"|Uemura's date
| Kyoto
|}
Category:Uemura dye archive
Hakubaika (Plum tree) - right (390 R)

[[[SliderGallery rightalign|Uemura_10-15-2009_390.jpg~Normal]]]{| class="wikitable"
|-	
! scope="row"|Museum number
| 390
|-	
! scope="row"|Uemura number / title
| ; "Haze-some 25"
|-	
! scope="row"|Folder location
| 5th shelf
|-	
! scope="row"|Sample location
| right (390 R)
|-	
! scope="row"|Fiber type
| silk
|-	
! scope="row"|Color
| light greenish ochre
|-	
! scope="row"|Dyestuff (Japanese common name)
| 白梅花 : Hakubaika
|-	
! scope="row"|Dye (English common name)
| plum tree with white flower
|-	
! scope="row"|Dyestuff (botanical name)
| Armeniaca mume (Siebold et Zucc.) de Vriese (Prunus mume Siebold et Zucc.)
|-	
! scope="row"|Plant part
| flower / fresh (?)
|-	
! scope="row"|Dyestuff extraction
| boiled in water
|-	
! scope="row"|Auxiliary agent in dye bath
| -
|-	
! scope="row"|Mordant
| iron
|-	
! scope="row"|Other auxiliary agent
| -
|-	
! scope="row"|Uemura's date
| Kyoto
|}
Category:Uemura dye archive
Hakushoku no bara - left (184 L)

[[[SliderGallery rightalign|Uemura_07-09-2009_184.jpg~Normal]]]{| class="wikitable"
|-	
! scope="row"|Museum number
| 184
|-	
! scope="row"|Uemura number / title
| ; "Haze-some 25"
|-	
! scope="row"|Folder location
| 3rd shelf
|-	
! scope="row"|Sample location
| left (184 L)
|-	
! scope="row"|Fiber type
| silk
|-	
! scope="row"|Color
| mustard yellow
|-	
! scope="row"|Dyestuff (Japanese common name)
| 白色の薔薇 : Hakushoku no bara
|-	
! scope="row"|Dye (English common name)
| Tea rose*/white rose
|-	
! scope="row"|Dyestuff (botanical name)
| Rosa X centifolia L. (?)
|-	
! scope="row"|Plant part
| flower /fresh (?)
|-	
! scope="row"|Dyestuff extraction
| boiled in water
|-	
! scope="row"|Auxiliary agent in dye bath
| -
|-	
! scope="row"|Mordant
| copper
|-	
! scope="row"|Other auxiliary agent
| -
|-	
! scope="row"|Uemura's notes
| It was not possible to color a fabric by rubbing fresh petals of this rose.
|-	
! scope="row"|Uemura's date
| Kyoto
|}
Category:Uemura dye archive
Hakushoku no bara - right (184 R)

[[[SliderGallery rightalign|Uemura_07-09-2009_184.jpg~Normal]]]{| class="wikitable"
|-	
! scope="row"|Museum number
| 184
|-	
! scope="row"|Uemura number / title
| ; "Haze-some 25"
|-	
! scope="row"|Folder location
| 3rd shelf
|-	
! scope="row"|Sample location
| right (184 R)
|-	
! scope="row"|Fiber type
| silk
|-	
! scope="row"|Color
| gray
|-	
! scope="row"|Dyestuff (Japanese common name)
| 白色の薔薇 : Hakushoku no bara
|-	
! scope="row"|Dye (English common name)
| Tea rose /white rose
|-	
! scope="row"|Dyestuff (botanical name)
| Rosa X centifolia L. (?)
|-	
! scope="row"|Plant part
| flower /fresh (?)
|-	
! scope="row"|Dyestuff extraction
| boiled in water
|-	
! scope="row"|Auxiliary agent in dye bath
| -
|-	
! scope="row"|Mordant
| iron
|-	
! scope="row"|Other auxiliary agent
| -
|-	
! scope="row"|Uemura's notes
| It was not possible to color a fabric by rubbing fresh petals of this rose.
|-	
! scope="row"|Uemura's date
| Kyoto
|}
Category:Uemura dye archive
Hal resin

== Description ==
A resinous exudation from the hal tree, Vateria acuminata, native to Sri Lanka. Hal resin has been used to prepare lamp black. It has also been used to prepared a lacquer coating called valitti.
== Synonyms and Related Terms ==
valitti; Vateria acuminata
==Resources and Citations==
* B.D.Nandadeva, Materials used in Sri Lanka, personal communication, 1995
Category:Materials database
Haldu

== Description ==
Timber from the tree, Adina cardifolia, native to India and Thailand. Haldu is an important commercial timber in India where it is used for furniture, turnery, brush backs and toy making. The yellowish wood has a straight grain and silky texture. It is moderately resistant to fungi and is slightly susceptible to borer beetle damage.
== Synonyms and Related Terms ==
Adina cardifolia; kwao; edú (Port.)
==Physical and Chemical Properties==
Density	40 ppcf
==Resources and Citations==
* F. H. Titmuss, Commercial Timbers of the World, The Technical Press Ltd., London, 1965 Comment: Adina cordifolia
* Encyclopedia Britannica, http://www.britannica.com Comment: "India." Accessed 17 Nov. 2004. Adina cardifolia
Category:Materials database
Halibut liver oil

== Description ==
A yellowish oil obtained from boiling and pressing halibut livers. Halibut liver oil smells and tastes fishy, but is an important source of vitamins A and D. This nondrying oil has been used for dressing leather. Halibuts are found in the northern Atlantic and Pacific Oceans.
== Synonyms and Related Terms ==
haliver oil; aceite de hgado de mero (Esp.)
==Physical and Chemical Properties==
* Soluble in ether, ethanol, chloroform and carbon disulfide.
* Insoluble in water.
* Saponification number = 170-180
* Iodine number = 120-136
* Density = 0.92-0.93
==Resources and Citations==
* Thomas Gregory, Thomas Gregory, The Condensed Chemical Dictionary, Reinhold Publishing, New York, 3rd ed., 1942
* The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 4623
Category:Materials database
Halifax granite

== Description ==
A coarse-grain, porphyritic, gray granite with large crystals quarried near Halifax, Nova Scotia (Lent 1925). Halifax granite was used for buildings and monuments.
==Resources and Citations==
* Frank A. Lent, Trade names and Descriptions of Marbles, Limestones, Sandstones, Granites and Other Building Stones Quarried in the United States Canada and other Countries., Stone Publishing Co, New York, 1925
Category:Materials database
Halite

== Description ==
A mineral composed of sodium chloride that naturally occurs as colorless, cubic crystals. Halite is found in dry lakebeds, in underground salt deposits and near the ocean. Large deposits occur in Germany, Austria, Russia, France (Dax), India (Punjab), Canada (Ontario), and the U.S. (New York, Michigan, Kansas, California). It is often mined then ground for use as common table salt. Large, unground crystals are sold as rock salt. Rock salt is used to melt ice, as a food preservative, and for the production of soda ash by the glass industry.
[[[SliderGallery rightalign|NACL1.jpg~XRD]]]
== Synonyms and Related Terms ==
sodium chloride; rock salt; sea salt; evaporite; halita (Esp.); halite (Port.); Halit, Steinsalz (Deut.); haliet (Ned.)
== Physical and Chemical Properties ==
* Soluble in water. 
* Fluorescent. 
* Salty taste. 
* Transparent. 
* Fracture = conchoidal. 
* Streak = white. 
* Luster = vitreous. 
* Isometric, cubic crystals. 
* Perfect cleavage in three directions with 90 degree angles.
Composition 	NaCl
CAS 	7647-14-5
Mohs Hardness 	2.0 - 2.5
Density 	2.4-2.6 g/ml
Molecular Weight	58.44
Refractive Index	1.544
== Resources and Citations ==
* Mineralogy Database: Halite
* Encyclopedia Britannica, http://www.britannica.com Comment: "halite" [Accessed December 4, 2001]. 
* C.W.Chesterman, K.E.Lowe, Audubon Society Field Guide to North American Rocks and Minerals, Alfred A. Knopf, New York, 1979
* Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
* Caring for your Collections, Arthur W Schulz (ed.), Harry N. Abrams, Inc. , New York, 1992
* The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 8742
Category:Materials database
Hallowell granite

== Description ==
A fine-textured, light gray granite. Hallowell granite is quarried near Hallowell, Maine for use in buildings, monuments, mausoleums and bridges. The New York State Capitol building was built with Hallowell granite (Bucher 1996).
==Resources and Citations==
* Dictionary of Building Preservation, Ward Bucher, ed., John Wiley & Sons, Inc., New York City, 1996
* Frank A. Lent, Trade names and Descriptions of Marbles, Limestones, Sandstones, Granites and Other Building Stones Quarried in the United States Canada and other Countries., Stone Publishing Co, New York, 1925
Category:Materials database
Halloysite

== Description ==
A refractory clay that has a similar composition to kaolin but a different conformation. In halloysite, the plate-like structure are rolled into tubes. This results in high and often, nonuniform, shrinkage of the clay as it dries. Halloysite containing clays are found in New Zealand, Japan, North Africa and Mississippi (Fournier 1996).
[[[SliderGallery rightalign|Halloysite PMA.TIF~FTIR (PMA)]]]
== Synonyms and Related Terms ==
haloisite (Port.); Halloysit (Deut.); Al2O3.3SiO2.2H2O
== Risks ==
* Noncombustible.
==Resources and Citations==
* Thomas Gregory, The Condensed Chemical Dictionary, Reinhold Publishing, New York, 3rd ed., 1942
* Robert Fournier, Illustrated Dictionary of Practical Pottery, Chilton Book Company, Radnor, PA, 1992
* Random House, Webster's Encyclopedic Unabridged Dictionary of the English Language, Grammercy Book, New York, 1997
Category:Materials database
Halocarbon

[[[SliderGallery rightalign|aaiHALOCARBON.jpg~FTIR]]]
== Description ==
A compound containing carbons with one or more halogens attached. Hydrogens are located at any remaining bonding sites on the carbons. Monomeric halocarbons, such as Freon®, are used as refrigerants, propellants and fire-extinguishing agents. Polymerized halocarbon resins, such as Teflon®, are stable and have high chemical resistance.
== Resources and Citations ==
* Theodore J. Reinhart, 'Glossary of Terms', Engineered Plastics, ASM International, 1988
* Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
Category:Materials database
Halogen

== Description ==
Common name for any of the elements from group 7a of the periodic chart: fluorine, chlorine, iodine, bromine, and astatine. Halogens have seven valence electrons in their outer shell which makes them eager to gain an electron to complete their octet. Thus, they are very electronegative. They form negative ions in solution and will react with most metals to form binary salts. Fluorine is the most active of all chemical elements.
==Resources and Citations==
* Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
* Van Nostrand's Scientific Encyclopedia, Douglas M. Considine (ed.), Van Nostrand Reinhold, New York, 1976
* Random House, Webster's Encyclopedic Unabridged Dictionary of the English Language, Grammercy Book, New York, 1997
* The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998
Category:Materials database