1) Orthorhombic mineral
Found on
https://www.crosswordclues.com/clue/barrerite
Barrerite is a tectosilicate mineral and a member of the zeolite family. It is one of the rarer zeolites. It was named for Richard Maling Barrer (1910–1996), a British teacher born in New Zealand. Barrerite crystal are white to pinkish, with a vitreous-glassy luster. The crystal system is orthorhombic and is flat and tabular in appearance. It ha...
Found on
http://en.wikipedia.org/wiki/Barrerite
Barrerite is a mineral closely related to stellerite, but confirmed as a distinct species of mineral in 1975. Barrerite is a hydrated silicate of sodium, potassium, calcium and aluminium, and was previously erroneously known as sodium stellerite.
Found on
http://www.probertencyclopaedia.com/browse/HB.HTM
No exact match found.
