Pyramidal crystals of tinstone with a prismatic habit from East Transbaikal
Abstract
Study of the pegmatite deposits of tinstone from East Transbaikal yielded a number of results indicating a relationship between the form and genesis of this mineral. A series of cassiterite crystals found in pegmatite veins confirms the association of pyramidal crystals with high-temperature formation conditions. The described crystals of tinstone from the Zavitinskoye deposit, of high-temperature character, were of interest in that they exhibited a prismatic habit, which is characteristic of low-temperature pegmatites. Measurement of a single crystal showed that it is a dipyramid with angles between the normals to the dipyramid faces equal to 58°16'.
None
References
- Artemyev B.N. Materials on the mineralogy of cassiterite and some several other pegmatite and pneumatolytic minerals. Izv. Acad. Nauk Sciences, 1933. (in Russian)
- Ahlfeld F. Über Tracht und Genesis des Zinnsteins. Foitsch. d. Miner., BVol. 16, No. 1I, 1931, Sp. 47.
- Maucher. Leitfaden für Geologie. Unterricbt an Berg- und Hüttenschulen. Freiberg, 1914.