Phase formation in the flux systems K2O-P2O5-Fe2O3-MIIO-MoO3

KMg
0.09
Fe
1.91
(PO
4
)
2
is isotypic with KM
^II
Fe(PO
4
)
2
(M
^II
- Fe, Cu) (monoclinic system, space group P 2
1
/n). The framework is built up from [FeO
5
] and [Fe(Mg)O
6
] polyhedra sharing vertices, edges and connected by two types of bridging PO
4
tetrahedra. The K atoms are nine-coordinated and are located in hexagonal channels running along the direction of c-axis.