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CC=Collection Code: [AB2X4]=ANX Form: [cF56]=Pearson: [e d a]=Wyckoff Symbol: [Al2MgO4]=Structure Type:
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CC=34837 Help
TitleThe crystal chemistry of the silicate garnets.
AuthorsNovak, G.A.;Gibbs, G.V.
ReferenceIC&volume=56&fpage=791&details=yes target=icsd_help>American Mineralogist (1971) 56, 791-825
Link XRef SCOPUS Google
CompoundAl0.25 Ca3 Cr1.75 O12 Si3 - [Uvarovite] Calcium chromium aluminium silicate (3/1.8/0.3/3) [A2B3C3X12] [cI160] [h d c a] [Al2Ca3Si3O12]
Cell11.988(1), 11.988(1), 11.988(1), 90., 90., 90.
IA3-D (230) V=1722.82
RemarksR=0.033000 : P =11-696 : T =Al2Ca3Si3O12 : M =Uvarovite :
PDF 11-696, relations between xyz(O) and cation sizes given

Atom (site) Oxid. x, y, z, B, Occupancy
O1(96h)-2
Ca1(24c)2
Cr1(16a)3
Al1(16a)3
Si1(24d)4
0.030.040.6501
0.1200.2501
00000.87
00000.12
0.3700.250.251
Atom (site) Oxid. Beta11, Beta22, Beta33, Beta12, Beta13, Beta23
O1(96h)-2
Ca1(24c)2
Cr1(16a)3
Al1(16a)3
Si1(24d)4
0.000.000.000.00-.00-.00
0.000.000.00000.00
0.000.000.00-.00-.00-.00
0.000.000.00-.00-.00-.00
000000

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