Romeite

Roméite is a calcium antimonate mineral with the chemical formula (Ca,Fe,Mn,Na)₂(Sb,Ti)₂O₆(O,OH,F). It is a honey-yellow mineral crystallizing in the hexoctahedral crystal system. It has a Mohs hardness of 5.5-6.0. It occurs in Algeria, Australia, Brazil, China, Europe, Japan, New Zealand, and the United States in metamorphic iron-manganese deposits and in hydrothermal antimony-bearing veins.

Romeite
General
Category	Minerals
Formula	(Ca,Fe,Mn,Na)2(Sb,Ti)2O6(O,OH,F)
Crystal system	hexoctahedral
Identification
Color	Honey-yellow
Mohs scale hardness	5.5–6.0

Its type locality is Prabornaz Mine, Saint-Marcel, Aosta Valley, Italy. It was named after Jean-Baptiste L. Romé de l'Isle. Brugger, et al. (1997) used infrared spectroscopy to measure water content in Roméite crystals.