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)
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