Chalcedony

Chalcedony  inggih menika satunggaling wujud ingkang sami tumpuk-tumpukan.Heaney, Peter J., 1994. Structure and Chemistry of the low-pressure silica polymorphs. In: Reviews in Mineralogy v. 29; Silica: Physical Behavior, geochemistry and materials applications. Ed. Heaney, P.J., Prewitt, C.T., Gibbs, G.V., 1-40 Kuarsa lan moganit menika kalebet mineral silika, ananging kuarsa menika gadhah pérangan trigonal wondéné ingkang moganit menika gadhah sipat ingkang monoklinik. Struktur kimia saking chalcedony inggih menika SiO2.

Nama chalcedony menika asalipun saking basa Latin chalcedonius (utawi calchedonius). Istilah menika ingkang kaping sapisan wonten ing satunggaling karyanipun Pliny the Elder, Naturalis Historia ingkang dipun-ginakaken kanggé nyebat batuan Jaspis ingkang asipat transparan.Pliny the Elder: Naturalis Historiae, Book 37, chapter 7,115 (Chalcedon ingkang wonten ing Asia Cilik.Erika Zwierlein-Diehl: Antike Gemmen und ihr Nachleben. Berlin (Verlag Walter de Gruyter) 2007, S. 307 (online) According to the OED a connection with the town of Chalcedon is "very doubtful": Ananging istilah khalkedon (χαλκηδών) menika ugi medal wonten ing Book of Revelation.

 Geokimia 

 Struktur 
Chalcedony menika naté dipunwastani minangka kriptokristalin kuarsa ingkang gadhah kandhutan seratChalcedony mineral information and data. http://www.mindat.org/min-960.html ananging samenika dipunmangertosi bilih chalcedony menika ugi gadhah sipat ingkang polimorf amargi wonten moganit wonten ing salebeting chalsedony kasebat.Origlieri, Marcus. "Moganite: a New Mineral -- Not!" Lithosphere (1994). Aug. 2007 <http://fgms.home.att.net/moganite.htm >.Nickel, Ernest H., and Monte C. Nichols. "IMA/CNMNC List of Mineral Names." Materials Data. June 2007. Aug. 2007 <http://www.geo.vu.nl/users/ima-cnmmn/MINERALlist.pdf > Kadar moganit ing satunggal sampel chalcedony manéka werna, Padatanipun ing antawisipun 5 dumugi 20 persèn.Heaney, Peter J., and Jeffrey E. Post. "The Widespread Distribution of a Novel Silica Polymorph in Microcrystalline Quartz Varieties." Science ns 255 (1992): 441-443. JSTOR. Aug. 2007. Keyword: moganite

 Kelarutan 
Sinaosa gadhah senyawa kimia ingkang mèmper kaliyan kuarsa, ananging chalcedony menika gadhah sipat langkung larut tinimbang kaliyan kuarsa wonten ing tèmperatur ingkang andhap. Bab menika saged amargi kristal chalcedony menika langkung alus satemah gadhah rasio wiyaring permukaan lan volume ingkang langkung inggil ingkang dipunprakirakaken amargi wontenipun moganit.

 Rujukan 

 Pranala njawi 

 Mindat: mineralogical data Chalcedony
 USGS: US Chalcedony locations 

Kategori:Kuarsa