Common molecules sample 50884

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Empirical formula:	HAl₃Ca₂O₁₃Si₃
a:	16.218 Å
b:	5.541 Å
c:	10.033 Å
α (alpha):	90.00 °
β (beta):	90.00 °
γ (gamma):	90.00 °
Volume:	901.54 Å³
Space group:	Pnma
Calculated density:	3.348 g/cm³
Z:	4
Formula weight:	454.357 g/mole
R(F):	0.0290
ICSD collection code:	62397
Structural formula:	Ca₂Al₃(SiO₄)₃(OH)
Common name:	Tanzanite
Short description:	Tanzanites name came from the place it was discovered: Tanzania, Africa.
Keyword:	zosite, trichroic, Tanzania
Citation of a publication:	Reference: Zeitschrift fuer Kristallographie (149,1979-). 179 (1987) p305-321. Authors: Smith,J. V. ;Pluth,J.J. ;Richardson,J.W.
IUPAC name:	Dicalcium trialuminium tris(silicate) hydroxide
Layman's explanation:	Tanzanite was discovered in Tanzania, Africa in1967, which is still the only place it can be found. It is a variety of zoisite, which is a calcium aluminum silicate. Due to its rarity and beautiful color, tanzanite is mainly used as a gemstone for jewelry. Tanzanite is trichroic, meaning it shows three different colors depending on the angle viewed; the colors seen are blue, purple or bronze. However the blue color is attributed vanadium impurities.
Lab name:	Common molecules
Sample provider:	Obtained from the Inorganic Crystal Structure Database
Status:	Complete, visible to public

Repository Files:
50884.CIF	50884.crt	50884.GIF	50884.pdb	50884.sdt