Geoscience Reference
In-Depth Information
Compound
Representative
Cell
Parameter
( ˚ )
Rate Earth, Co.
No., Average
Bond Distance
( ˚ )
Tetrahedral
Radical
Form
Rare Earth
Polyhedra
R 4.67 [GeO 4 ] 3 O
Dy 4.67 [GeO 4 ] 3 O
P6 3 /mz 5 2
Dy
7
2.33
Orthotetrahedra
Framework
a 5 9.200
Dy
9
2.40
R 5 La Dy
c 5 6.808
H type R(OH) 3
6R 2 .[GeO 4 ][O,(OH,F) 2 ]
Sm(OH) 3 6Sm 2 [GeO 4 ][O,(OH,F) 2 ]
P6 3 /mz 5 2
Sm
7
2.51
Orthotetrahedra
Framework
a 5 15.90
Sm
9
2.48
R
Nd
Eu
c 5
6.98
5
R 2 Ge 2 O 7
Er 2 Ge 2 O 7
P4 1 2 1 2 z 5 4
Er
7
2.32
Diorthogroups
Framework
R 5 Tb Lu
a 5 6.778
c 5 12.34
Sc 2 Ge 2 O 7
C2/mz 5 2
Diorthogroups
Layers from
6-membered
a 5 6.56
b 5 8.690
c 5 4.900
β 5 102.5
R 4 [Ge 3 O 10 ] [GeO 4 ]
La 4 [Ge 3 O 10 ] [GeO 4 ]
P1 z 5 4
La
8
2.56
Triorthogroup
Framework
R 5 La Pr
a 5 12.76
b 5 7.070
c 5 7.006
α 5 90.95
β 5 90.35
γ 5 94.10
R 4 [Ge 3 O 10 ] [GeO 4 ]
Gd 4 [Ge 3 O 10 ] [GeO 4 ]
P1 z 5 6
Gd
8
2.48
Triorthogroup
Framework
R 5 Nd Gd
a 5 18.50
(Continued)
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