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Low temperature structure of magnesium nitrate hexahydrate, Mg (NO3)2·6H2O: A neutron diffraction study at 173 K

1995; Elsevier BV; Volume: 30; Issue: 10 Linguagem: Inglês

10.1016/0025-5408(95)00122-0

1873-4227

J. Schéfer, M. Grube,

Solid-state spectroscopy and crystallography

Abstract From compounds in the system Mg(NO 3 ) 2 -H 2 O, crystalline hexahydrate, Mg(NO 3 ) 2 ·6H 2 O, was chosen as a model substance in order to study melting processes. Mg(NO 3 ) 2 ·6H 2 O shows a two-stage melting process by having an additional phase transition. We present structural results for Mg(NO 3 ) 2 ·H 2 O of low temperature α-phase at 173 K using neutron single crystal diffraction. The neutron diffraction measurements confirmed the monoclinic space group P2 1 /c yielding lattice constants a = 6.190(2)A, b = 12.614(4)A, c = 6.56(1)A, and β = 93.72(1) ° at 173 K.