出典:Wiktionary
出典:『Wiktionary』 (2026/02/16 23:46 UTC 版)
Named for type locality Wheal Franco (a former copper mine in Tavistock, in Devon, England) + -lite.
francolite (countable and uncountable, plural francolites)
出典:Wikipedia
出典:『Wikipedia』 (2011/05/30 14:41 UTC 版)
Francolite is a carbonate rich variety of the mineral Fluorapatite and is present in most sedimentary phosphorites. It has a variable chemical composition which can be represented by (Ca, Mg, Sr, Na)10(PO4, SO4, CO3)6F2−3. The mineral was named after its occurrence at Wheal Franco, Whitchurch, Tavistock District, Devon, England.