Citation: Zachariasen, W.H. (1952). Crystal chemical studies of the 5f - series of elements. XVI. identification and crystal structure of protactinium metal and of protactinium monoxide. Acta Crystallographica (1,1948-23,1967), 5, pp. 19-21.
Formula: O Pa
Chemical name: Pa O
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: O4 Pa4 (O Pa)
Multiplicity: 1
RCSR Symbol: ast-d
Coordination sequences: