出典:Wiktionary
kernite (uncountable)
出典:Wikipedia
出典:『Wikipedia』 (2011/06/05 10:01 UTC 版)
Kernite, also known as rasorite is a hydrated sodium borate hydroxide mineral with formula Na2B4O6(OH)2·3H2O. It is a colorless to white mineral crystallizing in the monoclinic crystal system typically occurring as prismatic to acicular crystals or granular masses. It is relatively soft with Mohs hardness of 2.5 to 3 and light with a specific gravity of 1.91. It exhibits perfect cleavage and a brittle fracture. Kernite is used to produce borax which can be used in a variety of soaps.