小中大xrd中只给了cubic,如何知道是面心还是体心立方呢
有的xrd中只给了cubic,如何知道是面心立方还是体心立方呢?如下所示
Name and formula
Reference code: 01-1111
Mineral name: Magnetite
PDF index name: Iron Oxide
Empirical formula: Fe3O4
Chemical formula: Fe3O4
Crystallographic parameters
Crystal system: Cubic
Space group: Fd3m
Space group number: 227
a (?): 8.3740
b (?): 8.3740
c (?): 8.3740
Alpha (°): 90.0000
Beta (°): 90.0000
Gamma (°): 90.0000