Mineralpedia Details for Tadzhikite-(Ce)
Tadzhikite-(Ce)
Named for its type occurrence in Tajikistan, sometimes spelled Tadzhikistan as translated from Russian, Tadzhikite was originally thought to be yttrium dominant, but is, in fact, cerium dominant; however Tadzhikite can still be found to be called and labeled as Tadzhikite-(Y) instead of Tadzhikite-(Ce). Tadzhikite occurs at its type locality within replacement zones in pegmatitic dikes. It occurs in only four countries: Tajikistan, Italy, Norway, and Canada.
Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/tadzhikite-(Y).pdf
- Formula
- Ca4Ce3+2TiB4Si4O22(OH)2
- Crystal System
- Monoclinic
- Cleavage
- Distinct, None, None
- Luster
- Vitreous (Glassy)
- Color
- gray brown, reddish brown
- Streak
- white
- Class
- Monoclinic - Prismatic
- Hardness
- 6
- WebMineral
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- Mindat
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Tadzhikite-(Ce) from Vetrall, Vico Lake, Viterbo Province, Latium, Italy
Tiny reddish brown micro crystals in matrix. This Vico Lake volcanic complex is one of the great Italian mineral localities having 6 type localities and over 85 valid mineral occurences. It is rich in Cerium and other rare earth minerals as well as beryllium. Many of the minerals are not found elsewhere.
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Tadzhikite-(Ce) from Dara-Pioz Glacier, Alayskiy Range, Tien Shan Mts, Tajikistan
A 5mm brown plate of Tadzhikite-(Ce) with black Pyrochlore group memebr and thick, pink plates of Sogdianite.
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