Geoscience Reference
In-Depth Information
Table 7.17 New Structure Types of Alkali-Free Germanates of Rare Earth Elements
[44]
Compound
Solvent
Concentration (wt%)
Unit Cell Parameters
Space Group
Coordination Number
of Ge; Ge
a
O Radical
a
(
˚
)
b
(
˚
)
c
(
˚
)
Y
7
Ge
2
O
12
(F, OH)
5
KF
5.551
11.283
12.131
A2/m
4; [GeO]
4
γ
5
108.81
25%
4; 6;[Ge
IV
Ge
2
VI
O
9
]
Sm
4
Ge
3
O
9
(OH)
6
CsOH
15.145
10.909
7.161
Cmcm
Y
4
GeO
6
(OH, F)
4
KF
5.618
6.276
6.885
P1
4; [GeO
4
]
α
5
91.45
β
5
109.44
γ
5
111.24
Gd
3
GeO
5
(OH)
3
RbOH
5.510
6.011
10.277
P2
1
/m
5; [GeO
5
]
30
50%
γ
5
104.89
Sm
3
GeO
5
(OH)
3
RbOH
5.526
6.104
10.328
P2
1
/m
5; [GeO
5
]
30
50%
γ
5
104.76
Dy
3
GeO
5
(OH)
3
CsOH
5.481
5.920
10.215
P2
1
/m
5; [GeO
5
]
γ
5
105.02
40%
Gd
4
Ge
3
O
11
(OH)
2
CsOH
6.713
9.349
10.128
P1
4;[Ge
2
O
7
]
1
[GeO
4
]
α
5
62.19
β
5
73.67
γ
5
69.05
40%
Er
13
Ge
6
O
31
(OH, F)
CsOH
15.617
9.398
R3
4; [GeO
4
]
Nd
4
GeO
8
NaOH
7.475
5.727
17.927
Pmc2
1
4; [GeO
4
]
Yb
2
Ge
2
O
7
KF 25%
9.827
Fd3m
4; [GeO
4
]
