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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=39449 Help
TitleCrystal structure of a new natural Na,K,Fe-silicate.
AuthorsRastsvetaeva, R.K.;Rekhlova, O.Yu.;Khomyakov, A.P.
ReferenceKristallografiya (1991) 36, 892-897
Link XRef SCOPUS Google
CompoundH14 Fe0.9 K3 Mg0.1 Mn0.7 Na4 O29 Si8 Ti0.4 - [Ershovite] Sodium potassium iron manganese titanium magnesium silicate hydrate * [] [aP60] [i23 h] []
Cell10.244(2), 11.924(3), 5.276(3), 103.491(2), 96.960(3), 91.945(3)
P1- (2) V=620.77
RemarksR=0.041000 : D M =Ershovite : P =46-1424 :
A site occupation is implausible or meaningless but agrees with the paper.
The coordinates are those given in the paper but the atomic distances do not agree with those calculated during testing.The coordinates are probably correct.
Calculated density unusual but tolerable.

Atom (site) Oxid. x, y, z, B, Occupancy
Si1(2i)4
Si2(2i)4
Si3(2i)4
Si4(2i)4
Na1(2i)1
Na2(2i)1
K1(2i)1
K2(1h)1
Fe1(2i)2
Mn1(2i)2
Ti1(2i)4
Mg1(2i)2
O1(2i)-2
O2(2i)-2
O3(2i)-2
O4(2i)-2
O5(2i)-2
O6(2i)-2
O7(2i)-2
O8(2i)-2
O9(2i)-2
O10(2i)-2
O11(2i)-2
O12(2i)-2
O13(2i)-2
O14(2i)-2
H1(2i)1
H2(2i)1
H3(2i)1
H4(2i)1
H5(2i)1
H6(2i)1
H7(2i)1
O15(2i)-2
0.730.270.421.161
0.710.670.131.161
0.730.410.981.121
0.680.800.691.221
0.970.860.461.861
0.990.730.882.301
0.550.130.821.911
0.50.50.53.041
0.000.420.701.480.45
0.000.420.701.480.35
0.000.420.701.480.2
0.000.420.701.480.05
0.670.350.681.5(1
0.890.280.471.5(1
0.640.720.881.7(1
0.870.680.171.6(1
0.890.430.011.5(1
0.820.860.771.8(1
0.660.530.051.6(1
0.640.730.391.6(1
0.680.330.171.4(1
0.670.140.351.7(1
0.570.900.721.7(1
0.890.540.572.1(1
0.860.990.262.7(1
0.850.110.812.8(1
0.860.940.141.2(1
0.500.870.682.9(1
0.810.040.262.6(1
0.850.030.803.4(1
0.810.120.662.2(1
0.830.550.524.3(1
01.
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