Squawcreekite-rutile solid solution from the Kajlidongri Mine (India)
Cabella, Roberto; Basso, Riccardo; Lucchetti, Gabriella; Marescotti, Pietro; Martinelli, Alberto; Nayak, Virendra Kumar
European Journal of Mineralogy Volume 15 Number 2 (2003), p. 427 - 433
published: Mar 31, 2003
ArtNo. ESP147051502022, Price: 29.00 €
Squawcreekite is a rare AO2 oxide with rutile-type structure. A squawcreekite (FeSbO4)-rutile (TiO2) solid solution has been recognised in quartz veins from the Kajlidongri manganese mine District Jhabua, Madhya Pradesh (India): this finding represents the first occurrence of a chemically pure squawcreekite-rutile solid solution. Transmission electron microscopy analyses exclude the existence of intergrowths or microinclusions, as well as spinodal decomposition. Quantitative electron microprobe analyses clearly indicate that the exchange vector Fe3+Sb5+Ti4+-2 accounts for the wide compositional variation suggesting the existence of a solubility range in natural samples between rutile70squawcreekite30 - rutile30squawcreekite70.