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Common molecules sample 50891 - Reciprocal Net Log in
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Empirical formula: H.1Al2F1.9O4.1Si
a: 4.651 Å
b: 8.802 Å
c: 8.402 Å
α (alpha): 90.00 °
β (beta): 90.00 °
γ (gamma): 90.00 °
Volume: 343.97 Å3
Space group: Pbnm
Calculated density: 3.550 g/cm3
Z: 4
Formula weight: 183.844 g/mole
R(F): 0.0090
Structural formula: Al2(F0.95(OH)0.05)2(SiO4)
Common name: Topaz
ICSD collection code: 39711
Keyword: gemstone
Keyword: gamma irradiation
Keyword: Topazos
Short description: Topaz is colorless mineral, but when treated with gamma irradiation it turns blue, and becomes a hot commodity on the gem market
Keyword: Mineral
Layman's explanation: Topaz is a common mineral whose name originates from the island of Topazos which is now known as Zabarget, located in the Red Sea. The majority of natural topaz is colorless although in some instances it can be wine yellow or pale blue. The electric blue topaz that is often found on the gem market is produced by exposing the colorless stone to gamma irradiation treatments. Crystals are found in various sizes, some reaching as much as 595 pounds!
Citation of a publication: Zhurnal Neorganicheskoi Khimii. 38 (1993) p1346-1350. Belokoneva,E.L. ;Smirnitskaya,Yu.Ya ;Tsirel 'son,V.G.
IUPAC name: Aluminium Hydroxide Fluoride Silicate
Lab name: Common molecules
Sample provider: Obtained from the Inorganic Crystal Structure Database
Status: Complete, visible to public
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Repository Files:
50891.CIF 50891.crt 50891.GIF 50891.ort 50891.pdb
50891.sdt
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