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Feldspar group - Kurobera (Kurobira)

Informations

Reference List

http://www002.upp.so-net.ne.jp/mineralhunters/kurobera.html

Inserted from

Philip Blümner, Nürnberg, Mittelfranken, Deutschland

Collectors Summary

Chemical Formula XZ4O8 ( X = Ba, Ca, K, Na, NH4, Sr ; Z = Al, B, Si )