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CC=Collection Code: [AB2X4]=ANX Form: [cF56]=Pearson: [e d a]=Wyckoff Symbol: [Al2MgO4]=Structure Type:
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TitleCation partitioning in an unusual strontian potassic richterite from Siberia: Rietveld structure refinement and Mossbauer spectroscopy.
AuthorsSokolova, E.V.;Kabalov, Yu.K.;McCammon, C.;Schneider, J.;Konev, A.A.
ReferenceMineralogical Magazine (2000) 64, 19-21
Link XRef SCOPUS Google
CompoundH2 Ca0.36 Fe0.16 K0.92 Mg4.84 Na1.44 O24 Si8 Sr0.28 - [Richterite, strontian, potassic] Sodium potassium calcium strontium magnesium iron(III) catena-octasilicate hydroxide (1.44/0.92/0.36/0.28/4.84/ 0.16/1/2) [AB2C5D8X24] [mS84] [j7 i2 h2 g b a] []
Cell10.0325(1), 17.9770(10), 5.2698(1), 90., 104.70(1), 90.
C12/M1 (12) V=919.32
RemarksR=0.032000 : X M =Richterite, strontian, potassic :
Deviation of the charge sum from zero tolerable.

Atom (site) Oxid. x, y, z, B, Occupancy
Si1(8j)4
Si2(8j)4
Mg1(4h)2
Mg2(4g)2
Fe1(4g)3
Mg3(2a)2
Na1(4h)1
Ca1(4h)2
Sr1(4h)2
K1(2b)1
Na2(2b)1
O1(8j)-2
O2(8j)-2
O3(4i)-2
O4(8j)-2
O5(8j)-2
O6(8j)-2
O7(4i)-2
H1(8j)1
0.270.080.301.3(1
0.280.170.801.2(1
00.090.51.3(1
00.1801.0(0.92
00.1801.0(0.08
0000.8(1
00.270.51.6(0.68
00.270.51.6(0.18
00.270.51.6(0.14
00.501.7(0.92
00.501.7(0.08
0.110.080.210.9(1
0.110.170.711.4(1
0.1000.710.6(1
0.350.240.791.0(1
0.330.120.091.1(1
0.330.110.601.7(1
0.3200.301.3(1.
00.5

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