Geoscience Reference
In-Depth Information
Compound
Representative
Cell Parameter
(
˚
)
Rare Earth, Co.
No., Average Bond
Distance (
˚
)
Tetrahedral
Radical Form
Rare Earth
Polyhedra
Na
3
Sc
2
[PO
4
]
3
Bb Z
5
4
Sc
6
2.092
Orthotetrahedra
Discrete polyhedra
a
5
16.10
b
5
9.109
c
5
8.928
γ
5
127.15
Na
3
Sc
2
[PO
4
]
3
R3c Z
5
6
Sc
6
2.080
Orthotetrahedra
Discrete polyhedra
a
5
8.927
c
5
22.34
Na
4.5
R
1.5
[PO
4
]
3
Na
4.5
Y
1.5
[PO
4
]
3
R3c Z
5
6
Yb, Na
6
2.213
Orthotetrahedra
Discrete polyhedra
R
5
Tm, Yb, Lu
a
5
9.12
c
5
21.81
Na
3
R[PO
4
]
2
Na
3
Nd[PO
4
]
2
Pbc2
1
Z
5
24
Nd
7
2.41
Orthotetrahedra
Discrete polyhedra
R
5
La
Er, Y
a
5
15.874
Nd
6
2.43
b
5
13.952
Nd
8
2.48
c
5
18.470
Nd
K
3
Nd[PO
4
]
2
P2
1
/mZ
5
2
Nd
7
2.44
Orthotetrahedra
Discrete polyhedra
a
5
9.532
b
5
5.631
c
5
7.444
β
5
90.95
Na
3
Ce[PO
4
]
2
Orthorhombic
Ce
a
5
14.07
b
5
16.04
c
5
18.61
(Continued)