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ICSD for WWW : Details

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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=16702 Help
TitleDie Kristallstruktur von Langbeinit, K2 Mg2 (S O4)3.
AuthorsZemann, A.; Zemann, J.
ReferenceActa Crystallographica (1957) 10, 409-413
Link XRef SCOPUS SCIRUS Google
CompoundK2 Mg2 O12 S3 - Dipotassium dimagnesium tris(sulfate(VI)) [A2B2C3X12] [cP76] [b5 a4] [K2Mg2(SO4)3]
Cell9.920(4), 9.920(4), 9.920(4), 90., 90., 90.
P213 (198) V=976.19
RemarksR=0.148000 : PDF =19-974 : STP =K2Mg2(SO4)3 : TYP XDP
Calculated density unusual but tolerable.
At least one temperature factor missing in the paper.
Structure type: K2 Mg2 (S O4)3
Prototype: K2 Mg2 (S O4)3
Atomic environment types: 4-a, 6-a, 9-a; 3#a, 4-a
Also langbeinite-type
Standardized with Structure Tidy
PDF 19-974, hk0 data only, isotypic to Tl2 Mn2 (S O4)3

Atom (site) Oxid. x, y, z, B, Occupancy
K1(4a)1
K2(4a)1
Mg1(4a)2
Mg2(4a)2
S1(12b)6
O1(12b)-2
O2(12b)-2
O3(12b)-2
O4(12b)-2
0.5680.5680.56801
0.7970.7970.79701
0.0840.0840.08401
0.350.350.3501
0.0330.2680.37501
0.0120.1960.24601
0.1730.2580.42701
0.0210.0570.71301
0.0020.4120.34901

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