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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=94315 Help
TitleA powder neutron diffraction study of the oxide-ion-conducting apatite-type phases, La9.33 Si6 O26 and La8 Sr2 Si6 O26.
AuthorsSansom, J.E.H.;Richings, D.;Slater, P.R.
ReferenceIC&volume=139&fpage=205&details=yes target=icsd_help>Solid State Ionics (2001) 139, 205-210
Link XRef SCOPUS Google
CompoundLa9.33 O26 Si6 - Lanthanum silicate oxide (9.33/6/2) [A6B9X26] [hP41] [g6 d2 c2] []
Cell9.7248(1), 9.7248(1), 7.1895(1), 90, 90, 120
P3- (147) V=588.83
RemarksR=0.038000 : D N
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.

Atom (site) Oxid. x, y, z, B, Occupancy
La1(2d)3.015
La2(2d)3.015
La3(6g)3.015
Si1(6g)4
O1(6g)-2
O2(6g)-2
O3(6g)-2
O4(6g)-2
O5(2c)-2
O6(2c)-2
0.330.66-0.01.510.83
0.330.660.491.510.86
0.010.240.250.930.98
0.400.370.251.191
0.320.480.2501
0.590.470.2501
0.330.250.0701
0.340.250.4301
0.0.0.2400.84
0.0.0.3700.14
Atom (site) Oxid. B11, B22, B33, B12, B13, B23
La1(2d)3.015
La2(2d)3.015
La3(6g)3.015
Si1(6g)4
O1(6g)-2
O2(6g)-2
O3(6g)-2
O4(6g)-2
O5(2c)-2
O6(2c)-2
000000
000000
000000
000000
2.5(2.5(2.3(-1.82.2(-1.9
1.1(1.0(2.3(1.2(0.3(0.8(
3.8(1.6(1.9(-0.10.6(-1.8
3.4(1.4(1.2(0.8(1.8(0.7(
-0.1-0.23.0(0.-0.80.
-0.1-0.23.0(0.-0.80.

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