Low-temperature Mössbauer study of heterosite, (Fe, Mn)PO4.

The heterosite phase occurring in a pegmatitic rock sample was characterized by X-ray diffraction, by energy-dispersive X-ray spectroscopy and by Mössbauer spectroscopy. The orthorhombic unit-cell parameters, expressed in Å, were found as a=9.733 (1), b=5.