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idrialite
Idrialite, or idrialine, is a soft, orthorhombic hydrocarbon mineral with chemical formula: C22H14.〔〔〔 It is usually greenish yellow to light brown in colour with bluish fluorescence.
Raman spectroscopy studies indicate that it may be a mixture of complex hydrocarbons including benzonaphthothiophenes (chemical formula: C16H10S) and dinaphthothiophenes (chemical formula: C20H12S).〔(Raman spectroscopy as tool for the characterization of thio-polyaromatic hydrocarbons in organic minerals )〕
==Discovery and occurrence==
It was first described in 1832 for an occurrence in the Idrija region west of Ljubljana, northwestern Slovenia.〔 It also occurs at Skaggs Springs, Sonoma County, western Lake County and the Knoxville Mine in Napa County, California.〔 It has also been reported from localities in France, Slovakia and Ukraine.〔
It can be found mixed with clay, pyrite, quartz and gypsum associated with cinnabar in the Idrija occurrence and with metacinnabar, realgar and opal in the Skaggs Spring location.〔
Its combustibility gave rise to the term "inflammable cinnabar", which is one of its synonyms.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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