page_title: Demesmaekerite
hierarchical_section_title: Demesmaekerite
caption_attribution_description: English: Demesmaekerite, Chalcomenite Locality: Musonoi Mine, Kolwezi, Western area, Katanga Copper Crescent, Katanga (Shaba), Democratic Republic of Congo (Zaïre) (Locality at mindat.org) Size: 4.3 x 2.3 x 2.5 cm. Here is a good specimen of the rare uranium selenite Demesmaekerite associated with blue Chalcomenite crystals. Musonoi is the type locality for Demesmaekerite (there are only 2 localities known). Chalcomenite is the rare copper selenite and is known from less than 30 localities worldwide, few in good crystals. Demesmaekerite is usually associated with the other uranium selenites and not often with Chalcomenite. These specimens where found during the removal of the uranium dump in the early 1990’s. Deutsch: Demesmaekerit, Chalkomenit Fundort: Musonoi Mine, Kolwezi, Western area, Katanga Copper Crescent, Katanga, Demokratische Republik Kongo (Fundort bei mindat.org) Größe: 4.3 x 2.3 x 2.5 cm.
context_page_description: Demesmaekerite is a rare uranium selenite mineral with the chemical formula: Pb₂Cu₅(UO₂)₂(SeO₃)₆(OH)₆·2H₂O.
  It is named after the Belgian mineralogist Gaston Demesmaeker, who worked at the Musonoi Mine in Katanga. It is a secondary mineral which contains lead, copper and selenium, it is a bottle green to brown/yellow color, its crystal habit varies depending on where it is found.
  It can be found associated with other rare selenium-bearing uranium ores, such as haynesite, guilleminite, marthozite and piretite.
context_section_description: Demesmaekerite is a rare uranium selenite mineral with the chemical formula: Pb₂Cu₅(UO₂)₂(SeO₃)₆(OH)₆·2H₂O.
  It is named after the Belgian mineralogist Gaston Demesmaeker, who worked at the Musonoi Mine in Katanga. It is a secondary mineral which contains lead, copper and selenium, it is a bottle green to brown/yellow color, its crystal habit varies depending on where it is found.
  It can be found associated with other rare selenium-bearing uranium ores, such as haynesite, guilleminite, marthozite and piretite.
caption: A specimen of demesmaekerite associated with blue chalcomenite crystals
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