...D. S. Goldman; G. R. Rossman Abstract Osumilites from Sakkabira, Japan, Obsidian Cliffs, Oregon, and Nain, Labrador have been studied by optical, infrared, and Mossbauer spectroscopy. Osumilite is an anhydrous mineral. A major proportion of the Fe 2+ occurs in the channel-like cavities. Biaxial...

...-coordination, (Mg, Fe +2 ) in 6-coordination, and (K, Na, Ca) in 12-coordination. It is iso-structural with milarite. Osmulite was found in a volcanic rock at Sakkabira, Kyusyu, Japan, and is named after the province Osumi. Probably osumilite is a relatively common mineral, but always has been mistaken...

... of Sakkabira, Japan, and was considered a rare mineral. Up to now, more than 30 natural occurrences are known ( Malsy, 2003 ), like xenolithic hosts in acid volcanic rocks, “dry” high-grade metamorphic rocks, shallow to deep-seated contact metamorphosed rocks and fused hornfelses ( e.g. buchites...