Original paper

Structural studies on synthetic and natural Fe-Sb-oxides of MO2 type

Basso, R.; Cabella, R.; Lucchetti, G.; Marescotti, P.; Martinelli, A.

Abstract

Structural refinements were performed on synthetic and natural Fe-Sb-oxides of MO2 type according to the Rietveld method. The refinement in the P42/mnm space group confirms that the synthetic phase (Fe3+Sb5+)O4, corresponding to squawcreekite, is characterised by a rutile-type structure. In contrast to the compositional and structural data (ideally Fe2+Sb5+2O6 with a trirutile-type structure) implicitly accepted by the IMA Commission on New Minerals and Mineral Names, also tripuhyite seems to crystallize with a rutile-type structure in the P42/mnm space group and its composition is based on an equimolar ratio between Fe and Sb.

Keywords

squawcreekitetripuhyitenatural and synthetic phaseschemical dataxrd analysesrietveld refinements