Armbruster T , Galuskin E V , Reznitsky L Z , Sklyarov E V , European Journal of Mineralogy , 21 (2009) p.885-891, X-ray structural investigation of the oxyvanite (V3O5) - berdesinskiite (V2TiO5), series: V4+ substituting for octahedrally coordinated Ti4+, Locality: Pereval marble quarry, Sludyanka complex, south of Lake Baikal, Russia, Sample: Crystal I-2-7