出典:Wikipedia
出典:『Wikipedia』 (2011/07/15 02:36 UTC 版)
Niter (AmE) or nitre (BrE) is the mineral form of potassium nitrate, KNO3, also known as saltpeter (AmE) or saltpetre (BrE). Historically, the term "nitre" – cognate with "natrium", a Latin word for sodium – has been very vaguely defined, and it has been applied to a variety of other minerals and chemical compounds, including sodium nitrate (also "soda nitre," "cubic nitre", or nitratite), sodium carbonate and potassium carbonate.