Esperite
≈ 2 min read
Names in other languages
No names in other languages are held for this entry yet.
Article bodies are English and are not machine-translated. A name in another language is not a translation of the article.
Esperite is a rare complex calcium lead zinc silicate (PbCa 3 Zn 4 (SiO 4 ) 4 ) related to beryllonite and trimerite that used to be called calcium larsenite. Esperite has a white, greasy appearance in daylight and is much prized for its brilliant yellow green fluorescence under shortwave ultraviolet light. It is found in association with calcite, franklinite, willemite, hardystonite and clinohedrite. It has also been 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.
Esperite is a rare complex calcium lead zinc silicate (PbCa 3 Zn 4 (SiO 4 ) 4 ) related to beryllonite and trimerite that used to be called calcium larsenite. Esperite has a white, greasy appearance in daylight and is much prized for its brilliant yellow green fluorescence under shortwave ultraviolet light. It is found in association with calcite, franklinite, willemite, hardystonite and clinohedrite. It has also been 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.
References
Mineral galleries Pete Dunn, Franklin and Sterling Hill, New Jersey: the world's most magnificent mineral deposits, part 3 p. 368 (1995) G. Grundmann, et al.: The El Dragon Mine, Potosi Bolivia, Mineralogical Record v.21 #2 p. 142 (1990) Anthony et al., Handbook of Mineralogy, Vol. 2 (silicates) part 1 p. 225 (1995) Robbins, Manuel: Fluorescence Gems and Minerals under Ultraviolet Light Geoscience Press pp 50–51,243 (1994)
Text derived from https://en.wikipedia.org/w/index.php?oldid=1361670985 under CC BY-SA 4.0; modifications have been made.