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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=97311 Help
TitleSingle-crystal XRD, TEM and thermal studies of the satellite reflections in nepheline.
AuthorsHassan, I.; Antao, S.M.; Hersi, A.A.M.
ReferenceIC&volume=41&fpage=759&details=yes target=icsd_help>Canadian Mineralogist (2003) 41, 759-783
Link XRef SCOPUS Google
CompoundAl8 K1.35 Na6 O32 Si8 - [Nepheline] Potassium sodium octaalumooctasilicate (1.35/6/1) [AB6C8D8X32] [hP55] [c9 b2 a] []
Cell9.9853(7), 9.9853(7), 8.3689(17), 90, 90, 120
P63 (173) V=722.64
RemarksR=0.041000 : D M =Nepheline :
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.
Deviation of the charge sum from zero tolerable.

Atom (site) Oxid. x, y, z, B, Occupancy
Al1(2b)3
Si1(2b)4
Si2(6c)4
Al2(6c)3
K1(2a)1
Na1(6c)1
O1(6c)-2
O2(6c)-2
O3(6c)-2
O4(6c)-2
O5(6c)-2
O6(6c)-2
0.660.330.190.011
0.660.330.800.011
0.330.090.310.011
0.330.090.680.011
0.0.0.990.020.67
0.440.990.990.021
0.710.340.980.030.33
0.310.020.490.021
0.520.170.730.031
0.500.160.240.031
0.280.220.310.021
0.260.220.680.021
Atom (site) Oxid. U11, U22, U33, U12, U13, U23
Al1(2b)3
Si1(2b)4
Si2(6c)4
Al2(6c)3
K1(2a)1
Na1(6c)1
O1(6c)-2
O2(6c)-2
O3(6c)-2
O4(6c)-2
O5(6c)-2
O6(6c)-2
0.010.010.010.000.0.
0.010.010.010.000.0.
0.010.010.010.000.000.00
0.010.000.010.000.000.00
0.020.020.030.010.0.
0.020.020.010.01-.000.00
0.020.040.000.000.00-.00
0.050.020.010.020.000.00
0.010.010.070.00-.00-.00
0.010.010.060.000.000.00
0.020.010.010.010.000.00
0.020.010.020.01-.00-.00

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