| 词条 | Faustite |
| 释义 |
The IMA approved mineral faustite,[1] named after the American mineralogist and petrologist with the U.S. Geological Survey (USGS) Dr. George Tobias Faust,[2] is a member of the triclinic turquoise group of hydrous phosphates with the following chemical composition: ZnAl6(PO4)4(OH)8·4H2O Some divalent copper generally replaces the zinc position. Faustite is the zinc rich analogue of turquoise having almost four times as much zinc than copper in its crystal structure.[3] Trivalent (ferric) iron may replace some of the aluminum. Minor amounts of calcium may also be present. It has a hardness of 4.5 - 5.5 on the Mohs scale of mineral hardness and aside from having a slightly lower hardness, it may be difficult to distinguish it from turquoise in hand specimens. Faustite has a blue-green to apple green color in polished cabochons, and may be presented as a turquoise imitation, and it may also be treated with stabilizers for jewelry making. References1. ^{{cite web|title=Faustite|url=http://rruff.info/doclib/hom/faustite.pdf|work=RRUFF Project|publisher=Mineral Data Publishing|accessdate=8 April 2014}} 2. ^{{cite web|url=http://www.mindat.org/min-1623.html |title=Faustite: Faustite mineral information and data |publisher=Mindat.org |date= |accessdate=2014-04-08}} 3. ^{{cite web|url=http://www.webmineral.com/data/Faustite.shtml#.U0M57KLDu2A |title=Faustite Mineral Data |publisher=Webmineral.com |date= |accessdate=2014-04-08}}
2 : Phosphate minerals|Triclinic minerals |
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