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PhotosKrausite - Javier Mine, Huachuas, Lucanas Province, Ayacucho Department, Peru

26th Dec 2015 19:30 UTCJaroslav Hyrsl Expert

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Krausite, Coquimbite
Javier Mine (Javier Ortega Mine), Huac-huas District, Lucanas Province, Ayacucho, Peru
Copyright © Gianfranco Ciccolini
Hi, are you sure it is krausite? I X-rayed three and it forms flat strongly striated crystals. But I am sure there can be more rare sulfates present.

Best regards, Jaroslav Hyrsl

29th Dec 2015 16:57 UTCUwe Kolitsch Manager

(Message was sent by Jaroslav.)

Some krausite seem to show unusual morphologies, e.g. http://www.mindat.org/photo-406189.html

30th Dec 2015 10:48 UTCGianfranco Ciccolini 🌟

See: http://www.handbookofmineralogy.org/pdfs/krausite.pdf. that describes the krausite: Crystal Data: Monoclinic. Point Group: 2/m. Crystals are equant, may be tabular on {001} or short prismatic along [001]. Small crystals may exhibit prominent {110}, with {101}, {102}, {112, {001}, {100}, {210}, {211}; larger crystals, to 5 mm, are typically rough; forms massive crusts. This description refers to previous findings in the Javier mine.

19th May 2016 07:50 UTCGianfranco Ciccolini 🌟

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Krausite, unlike the goldichite that has the same chemical composition, assumes, as in the previous message, different forms. Below two specimens with elongated crystals and an other as rosette aggregates. Like its predecessors, they have not been analyzed, but I attributed that these crystals have similarity in color and the presence of typical crystalline forms of krausite.

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