出典:Wiktionary
出典:『Wiktionary』 (2025/03/30 20:56 UTC 版)
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esperite (usually uncountable, plural esperites)
出典:Wikipedia
出典:『Wikipedia』 (2011/02/05 17:29 UTC 版)
Esperite is a rare complex calcium lead zinc silicate (PbCa3Zn4(SiO4)4) related to beryllonite and trimerite that used to be called calcium larsenite. It occurred on the 400 foot level, approximately 1080 feet north of the north side of the Palmer Shaft pillar and other parts of the Franklin, New Jersey ore body.It has a white, greasy appearance in daylight and is much prized for its brilliant yellow green fluorescence under shortwave ultraviolet light. Found in association with calcite, franklinite, willemite, hardystonite and clinohedrite. Also found as prismatic crystals up to 1 mm in length at the El Dragon Mine, Potosi, Bolivia in association with allophane, chalcomenite, clinochalcomenite and barite.