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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=40743 Help
TitleLocation of impurity cations in synthetic Co- and Cucontaining beryls according to results of precicion X-ray analysis, ESR, and optical spectroscopy.
AuthorsEvdokimova, A.A.;Belokoneva, E.L.;Artemenko, V.V.;Dubovskaya, V.M.;Urusov, V.S.
ReferenceKristallografiya (1989) 34, 723-730
Link XRef SCOPUS Google
CompoundH0.48 Al1.97 Be2.97 Co0.06 O18.24 Si6 - [Beryl, cobaltian] Beryllium aluminum cobalt cyclo-hexasilicate hydrate * [A2B3C6X18] [hP59] [m l2 f c a] []
Cell9.222(2), 9.222(2), 9.204(2), 90., 90., 120.
P6/MCC (192) V=677.89
RemarksR=0.010800 : D M =Beryl, cobaltian : =Co : P =9-430 :
At least one temperature factor is implausible or meaningless but agrees with the value given in the paper.
Calculated density unusual but tolerable.
Atomic parameters from author

Atom (site) Oxid. x, y, z, B, Occupancy
Be1(6f)2
Co1(6f)3
Al1(4c)3
Co2(4c)2.5
Si1(12l)4
O1(24m)-2
O2(12l)-2
O3(2a)-2
H1(4e)1
0.500.2500.99
0.500.2500.01
0.330.660.2500.98
0.330.660.2500.01
0.110.38001
0.490.140.3501
0.230.30001
000.255.4(0.24
00.24
Atom (site) Oxid. Beta11, Beta22, Beta33, Beta12, Beta13, Beta23
Be1(6f)2
Co1(6f)3
Al1(4c)3
Co2(4c)2.5
Si1(12l)4
O1(24m)-2
O2(12l)-2
O3(2a)-2
H1(4e)1
0.740.600.640.3000
0.740.600.640.3000
0.300.300.320.1500
0.300.300.320.1500
0.230.280.280.1400
0.580.440.430.220.190.05
0.590.800.990.5500
000000
000000

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