Cryptohalite c 2001-2005 Mineral Data Publishing, version 1 (NH4 )2 SiF6 Crystal Data: Cubic. Point Group: 4/m 3 2/m. As crusts of interpenetrating tabular crystals, to 1 mm; in aggregates, which may be mammillary, columnar, globular, or arborescent.
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Arborescent, mammillary; commonly included within cryptohalite. ... Polymorphism & Series: Dimorphous with cryptohalite, the higher-temperature form. ...
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White to colourless crystals of cryptohalite. The red colour is due to admixtured (amorphous ?) selenium. Picture size 5 mm. ...
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Cryptohalite (Ammonium silicon hexafluoride) occurs as a sublimation ... cryptohalite by sintering of quartz with ammonium fluoride using derivato- ...
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White crystalline bararite intermixed with cryptohalite colored yellow by selenium. Shamokin, Northumberland County, Pennsylvani, USA. ... White crystalline bararite intermixed with cryptohalite colored yellow by selenium.
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; Mineral of the Month Club - An Inexpensive Way to Enjoy Minerals ... General Bararite Information ... Above a burning coal seam. Dimorphous with cryptohalite, the higher-temperature form.
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(NH4)2SiF6A colorless to white or gray, isometric mineral consisting of ammonium silicon fluoride; occurs in massive and arborescent forms. ...
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>> Elements Class: The Metals and Their Alloys and the Nonmetals. ... >> Sulfides Class: The Sulfides, the Selenides, the Tellurides, the Arsenides, the Antimonides, the Bismuthinides and the Sulfosalts. ... Cryptohalite (Ammonium Silicon Fluoride)
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Bararite - Wikipedia, the free encyclopedia
Bararite is a natural form of ammonium fluorosilicate (also known as hexafluorosilicate or fluosilicate). It has chemical formula (NH 4 ) 2 SiF 6 and trigonal crystal structure. This mineral wa...
en.wikipedia.org/wiki/Bararite |
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Ammonium fluorosilicate - Wikipedia, the free encyclopedia
Ammonium fluorosilicate (also known as ammonium hexafluorosilicate, ammonium fluosilicate or ammonium silicofluoride) has the formula (NH 4 ) 2 SiF 6 . It is a toxic chemical, like all salts of...
en.wikipedia.org/wiki/Ammonium_fluorosilicate |