*data for ICSD #99538
Coll Code 99538
Rec Date 2005/04/01
Chem Name Lanthanum Scandate(III)
Structured La (Sc O3)
Sum La1 O3 Sc1
ANX ABX3
D(calc) 5.78
Title A structural study of ternary lanthanide orthoscandate perovskites
Author(s) Liferovich, R.P.;Mitchell, R.H.
Reference Journal of Solid State Chemistry
(2004), 177, 2188-2197
Unit Cell 5.6803(1) 5.7907(1) 8.0945(1) 90 90 90
Vol 266.25
Z 4
Space Group P b n m
SG Number 62
Cryst Sys orthorhombic
Pearson oP20
Wyckoff d c2 b
R Value .0324
Red Cell P 5.680 5.790 8.094 90 90 90 266.252
Trans Red 1.000 0.000 0.000 / 0.000 1.000 0.000 / 0.000 0.000 1.000
Comments The structure has been assigned a PDF number (calculated
powder diffraction data): 01-074-4348
Rietveld profile refinement applied
Structure type : GdFeO3
X-ray diffraction (powder)
Atom # OX SITE x y z SOF H ITF(B)
La 1 +3 4 c 0.0100(2) 0.9572(1) 0.250 1. 0 0.32(2)
Sc 1 +3 4 b 0. 0.5 0. 1. 0 0.70(4)
O 1 -2 4 c 0.9032(15) 0.5277(14) 0.250 1. 0 1.00(8)
O 2 -2 8 d 0.7073(11) 0.2958(11) 0.9479(9) 1. 0 1.00(8)
*end for ICSD #99538
你给的信息确认正确?Unit Cell 5.6803(1) 5.7907(1) 8.0945(1) 90 90 90
Vol 266.25
Z 4
Space Group P b n m
SG Number 62
Cryst Sys orthorhombic
Red Cell P 5.680 5.790 8.094 90 90 90 266.252
Trans Red 1.000 0.000 0.000 / 0.000 1.000 0.000 / 0.000 0.000 1.000
我查了一下MS确实没有PBNM这个空间点群,但是62对应的是PNMA,属正交晶系,可能是给的信息有误。你可以选择62然后按给定的晶胞参数添加原子,可以试一下。