Geoscience Reference
In-Depth Information
Compound
Representative
Cell Parameter
(
˚
)
Rare Earth, Co.
No., Average Bond
Distance (
˚
)
Tetrahedral
Radical Form
Rare Earth
Polyhedra
c
5
7.280
β
5
91.97
NaNd[PO
3
]
4
P
21
/nZ
5
4
Nd
8
2.45
Chains with a period
of 4-tetrahedra
Discrete polyhedra
a
5
9.907
b
5
13.10
c
5
7.201
β
5
90.51
A-CsR[PO
3
]
4
CsNd[PO
3
]
4
P2
1
Z
5
2
Nd
8
2.45
Chains with a period
of 8-tetrahedra
Discrete polyhedra
R
5
Tb, Pr, Nd
a
5
7.145
b
5
8.809
c
5
11.007
β
5
105.86
MR[PO
3
]
4
T1Nd[PO
3
]
4
P2
1
/Z
5
4
Nd
8
2.441
Chains with a period
of 8-tetrahedra
Discrete polyhedra
M
5
K,Tl,Rb,Cs
a
5
10.440
R
Nd, Ho, Er
b
5
8.050
c
5
11.007
β
5
105.86
5
KYb[PO
3
]
4
P2
1
/nZ
5
4
Yb
7
2.27
Chains with a period
of 8-tetrahedra
Discrete polyhedra
a
5
7.776
b
5
8.853
c
5
14.831
β
5
96.36
Co. No.
coordination number.
5
