Hidalgoite, Beudantite, Mimetite

Specimen ID: UV7-KTV

Mineral(s)
Hidalgoite : PbAl3(AsO4)(SO4)(OH)6
Beudantite : PbFe3(AsO4)(SO4)(OH)6
Mimetite : Pb5(AsO4)3Cl
Locality
Mindat locality:
Events

Photo added to mindat.org

This SEM micrograph (BSE mode) of pale yellowish crusts reveals spheroidal to rosette-like aggregates which, according to EDS-analyses, grade from Fe-rich hidalgoite to Al-rich beudantite. The tiny white, acute crystal on the left is mimetite. The specimen, which was found by Fritz Schreiber in 2010, also contained tiny dark brownish, strongly rounded crystal of As-rich plumbojarosite (http://www.mindat.org/photo-728284.html).
Uwe Kolitsch - 22nd January 2016

Photo added to mindat.org

This SEM micrograph (SE mode) of pale yellowish crusts reveals spheroidal to rosette-like aggregates which, according to EDS-analyses, grade from Fe-rich hidalgoite to Al-rich beudantite. The tiny acute crystal on the left is mimetite (see BSE photo for much better contrast). The specimen, which was found by Fritz Schreiber in 2010, also contained tiny dark brownish, strongly rounded crystal of As-rich plumbojarosite (http://www.mindat.org/photo-728284.html).
Uwe Kolitsch - 22nd January 2016
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