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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=71131 Help
TitlePowder neutron diffraction study of alkali-substituted cordierites with MxMg2Al4+xSi5-xO18 (M=K, Cs; 0
AuthorsThomas, P.;Mercurio, D.;Mercurio, J.P.;Frit, B.
ReferenceIC&volume=28&fpage=101&details=yes target=icsd_help>European Journal of Solid State Inorgani (1991) 28, 101-102
Link XRef SCOPUS Google
CompoundAl4.5 K0.5 Mg2 O18 Si4.5 - [Cordierite high] Potassium magnesium cyclo-alumosilicate * [AB4C18X36] [hP59] [m l2 f e c] []
Cell9.7958(2), 9.7958(2), 9.3800(3), 90., 90., 120.
P6/MCC (192) V=779.5
RemarksR=0.040000 : D M =Cordierite high : N P =13-293 :
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.
At least one temperature factor is implausible or meaningless but agrees with the value given in the paper.
Mean T-O: 1.722, 1.654 (not conform with applied Si/Al)

Atom (site) Oxid. x, y, z, B, Occupancy
Mg1(4c)2
Al1(6f)3
Si1(6f)4
Al2(12l)3
Si2(12l)4
O1(24m)-2
O2(12l)-2
K1(4e)1
0.330.660.250.191
0.50.50.250.080.5
0.50.50.250.080.5
0.370.2600.070.50
0.370.2600.070.50
0.480.340.140.311
0.220.3000.811
000.171.830.25

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