PHYSICS

The framework of mixed nature in $\mathrm{Na}_3\{\mathrm{Fe}_2\mathrm{Fe}_3[\mathrm{PO}_4]_2\}$ crystal structure – a new homeotype in the series of natisite

O. V. Yakubovich, O. K. Melnikov, V. S. Urusov

Lomonosov Moscow State University

UDC: 548.736.6

Received: 11.07.1994