出典:Wiktionary
出典:『Wiktionary』 (2012/12/30 18:36 UTC 版)
cancrinite (複数形 cancrinites)
出典:Wikipedia
出典:『Wikipedia』 (2011/06/14 18:06 UTC 版)
Cancrinite is a complex carbonate and silicate of sodium, calcium and aluminium with the formula Na6Ca2[(CO3)2|Al6Si6O24]·2H2O. It is classed as a member of the feldspathoid group of minerals; the alkali feldspars that are poor in silica. Yellow, orange, pink, white or even blue, it has a vitreous or pearly lustre; a hardness of 5-6 and an uneven conchoidal fracture. It is unusual among the silicate minerals in that it will effervesce with hydrochloric acid due to the associated carbonate ions.