出典:Wiktionary
出典:『Wiktionary』 (2025/11/06 19:30 UTC 版)
From Afghan + -ite, since it was discovered in Afghanistan.
afghanite (countable and uncountable, plural afghanites)
出典:Wikipedia
出典:『Wikipedia』 (2011/05/17 21:01 UTC 版)
Afghanite, (Na,Ca,K)8[Al6Si6O24](SO4,Cl2,CO3)3 · 0.5H2O, is a hydrous sodium, calcium, potassium, sulfate, chloride, carbonate alumino-silicate mineral. Afghanite is a feldspathoid of the cancrinite group and typically occurs with sodalite group minerals. It forms blue to colorless, typically massive crystals in the hexagonal crystal system. It has a Mohs hardness of 5.5 to 6 and a specific gravity of 2.55 to 2.65. It has refractive index values of nω=1.523 and nε=1.529. It has one direction of perfect cleavage and exhibits conchoidal fracture. It fluoresces a bright orange.