Geoscience Reference
In-Depth Information
Compound
Representative
Cell Parameter
(
˚
)
Rare Earth, Co.
No., Average
Bond Distance
(
˚
)
Tetrahedral Radical Form
Rare Earth
Polyhedra
LiNd [GeO
4
]
Pbcn z
5
4
Nd 8 2.486
Orthotetrahedra
Framework
a
5
5.096
b
5
11.923
c
5
5.399
Me
3
R
2
[GeO
4
]
3
Ca
3
Y
2
[GeO
4
]
3
Ia3d z
5
8
Orthotetrahedra
Me
5
Sr, Ca
R
5
Ho
Lu, Y
Me
2
R
3
[GeO
4
]
3
Cl
a
5
12.085
Ca
2
Ce
3
[GeO
4
]
3
Cl
P6
3
/mz
5
2
Orthotetrahedra
Me
5
Ca, Ba
R
5
La, Ce
a
5
9.467
c
5
6.999
K
2
Sc
2
[Ge
2
O
7
](OH)
2
Pbcn z
5
4
Sc
6 2.11
Diorthogroups
Framework
a
5
7.06
b
5
11.35
c
5
10.67
Na
4
R
2
[Ge
4
O
13
]
Na
4
Sc
2
[Ge
4
O
13
]
Pna2
1
z
5
4
Sc
6 2.12
Tetragroups
Twinned polyhedra
R
5
Yb
Lu, Sc
a
5
14.30
b
5
5.46
c
5
14.65
K
2
R
4
[Ge
4
O
13
] (OH,
F)
4
K
2
Nd
4
[Ge
4
O
13
] (OH,
F)
4
P2
1
z
5
4
Nd 7 2.40
Tetragroups
Framework
R
Pr
Gd
a
5
6.821
8 2.53
5
b
5
7.438
c
5
17.639
γ
5
121.33
P1 z
5
2
Pr
7 2.26
2.61
Framework
