Electron microscopy
 
Pm-3m (221) Space Group
- Practical Electron Microscopy and Database -
- An Online Book -
Microanalysis | EM Book                                                                                   https://www.globalsino.com/EM/        

This book (Practical Electron Microscopy and Database) is a reference for TEM and SEM students, operators, engineers, technicians, managers, and researchers.
=================================================================================

 

Table 3010a. Pm-3m (221) space group.

Name in the International Tables for Crystallography
Pm-3m P
221 m-3m
Crystal system
Cubic m-3m
Asymm
0 ≤ x ≤ 1/2 and 0 ≤ y ≤ 1/2 and 0 ≤ z ≤ 1/2 and y ≤ x and z ≤ y
48
Symmetry (atomic coordinates)
X, Y, Z; -X, -Y, Z; -X, Y, -Z; X, -Y, -Z; Z, X, Y; Z, -X, -Y; -Z, -X, Y; -Z, X, -Y; Y, Z, X; -Y, Z, -X; Y, -Z, -X; -Y, -Z, X; Y, X, -Z; -Y, -X, -Z; Y, -X, Z; -Y, X, Z; X, Z, -Y; -X, Z, Y; -X, -Z, -Y; X, -Z, Y; Z, Y, -X; Z, -Y, X; -Z, Y, X; -Z, -Y, -X; -X, -Y, -Z; X, Y, -Z; X, -Y, Z; -X, Y, Z; -Z, -X, -Y; -Z, X, Y; Z, X, -Y; Z, -X, Y; -Y, -Z, -X; Y, -Z, X; -Y, Z, X; Y, Z, -X; -Y, -X, Z; Y, X, Z; -Y, X, -Z; Y, -X, -Z; -X, -Z, Y; X, -Z, -Y; X, Z, Y; -X, Z, -Y; -Z, -Y, X; -Z, Y, -X; Z, -Y, -X; Z, Y, X
Crystal examples

CsI, CsBr.
CsCl: Cs at 0, 0, 0 and Cl at 1/2, 1/2, 1/2.
ReO3 (Rhenium oxide): Re at 0, 0, 0 and O at 1/2, 0, 0.
CaTiO3: Ti at 0, 0, 0; Ca at 1/2, 1/2, 1/2 and O at 1/2, 0, 0.
AuCu3: Au at 0, 0, 0 and Cu at 0, 1/2, 1/2.

Table 3010b. Example of compounds with similar structures to BCC.

 
TiO2 (Rutile)
Cu2O (Cuprite)
Space group Im-3m P42/mnm Pm-3m Pn-3m
Compounds α-Fe, W, Nb, Ta, Na, K, Mo, V GeO2, SnO2, PbO2 CsI, CsBr, CsCl Pb2O, Ag2O

 

 

 

=================================================================================
The book author (Yougui Liao) welcomes your comments, suggestions, and corrections, please click here for submission. If you let book author know once you have cited this book, the brief information of your publication will appear on the “Times Cited” page.