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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=63432 Help
TitleReappraisal of the crystal chemistry of beryl.
AuthorsAurisicchio, C.;Fioravanti, G.;Grubessi, O.;Zanazzi, P.F.
ReferenceIC&volume=73&fpage=826&details=yes target=icsd_help>American Mineralogist (1988) 73, 826-837
Link XRef SCOPUS Google
CompoundAl1.99 Be2.97 Fe0.04 Na0.047 O18 Si5.971 - [Beryl] Aluminium iron iron(III) beryllium sodium cyclo-alumosilicate * [AB43C64D128X383] [hP58] [m l2 f c a] []
Cell9.2077(6), 9.2077(6), 9.1953(5), 90., 90., 120.
P6/MCC (192) V=675.15
RemarksR=0.027000 : D M =Beryl : =Fe : P =9-430 :
At least one temperature factor missing in the paper.
Deviation of the charge sum from zero tolerable.

Atom (site) Oxid. x, y, z, B, Occupancy
Si1(12l)4
Al1(12l)3
Be1(6f)2
Al2(6f)3
Al3(4c)3
Fe1(4c)3
Fe2(4c)2
O1(12l)-2
O2(24m)-2
Na1(2a)1
0.380.11000.99
0.380.11000.00
0.500.250.000.99
0.500.250.000.01
0.660.330.2500.98
0.660.330.2500.00
0.660.330.2500.01
0.310.23001
0.490.140.1401
000.2500.04
Atom (site) Oxid. U11, U22, U33, U12, U13, U23
Si1(12l)4
Al1(12l)3
Be1(6f)2
Al2(6f)3
Al3(4c)3
Fe1(4c)3
Fe2(4c)2
O1(12l)-2
O2(24m)-2
Na1(2a)1
0.000.000.000.0000
0.000.000.000.0000
000000
000000
0.000.000.000.0000
0.000.000.000.0000
0.000.000.000.0000
0.010.000.010.0000
0.000.000.000.00-.00-.00
000000

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