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Metalodevite: Zn(UO2)2(AsO4)2·10(H2O)
Comments: Micro crystals of pale yellow metalodevite to 1 mm. Location: Rivieral, Lodeve, Herault, Languedoc-Roussillon, France. Scale: Specimen Size 5 x 2 x 3 cm. © Tom Loomis / Dakota Matrix
Metamunirite: Na2[V+++++2O6] or NaVO3
Comments: Colorless, acicular crystals of metamunirite. Location: Burro Mine, Slick Rock District, San Miguel Co., Colorado, USA. Scale: Picture size 1.6 mm. © Thomas Witzke / Abraxas-Verlag
Metanovacekite: Mg(UO2)2(AsO4)2·4-8(H2O)
Comments: Bright yellow crystalline metanovacekite coatings on white crystalline gypsum. Location: Las Animas Mine, Municipio do Heuiles Serdan, Chihuahua, Mexico. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Metanovacekite: Mg(UO2)2(AsO4)2·4-8(H2O) Novacekite: Mg(UO2)2(AsO4)2·12(H2O)
Comments: Yellow, translucent platy novacekite/metanovacekite crystal aggregate. Location: Rabejac Mine, Olmet, Herault, France. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Metarossite: CaV2O6·2(H2O)
Comments: Bright yellow platy crystals to about 0.5mm covering sandstone matrix. Location: Arrowhead Claim, San Miguel Co., Colorado, USA. Scale: Picture size 1 cm. © Tom Loomis / Dakota Matrix
Comments: Light yellow metarossite on sandstone. Location: Burro Mine, Slick Rock District, San Miguel Co., Colorado. Scale: Picture size 5 mm. © Thomas Witzke / Abraxas-Verlag
Metaschoderite: Al2(PO4)(VO4)·6(H2O)
Comments: Orange crystalline metaschoderite crust on shale. Location: 25 miles east of Eureka, Fish Creek Range, Eureka County, Nevada, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Metaschoepite: UO3·n(H2O)(n<2) Antlerite: Cu3(SO4)(OH)4
Comments: Yellow crystals of metaschoepite with green antlerite. Location: Pöhla-Tellerhäuser Gallery, Pöhla, Schwarzenberg District, Erzgebirge, Saxony, Germany. Scale: Picture size 1.3 mm. © Thomas Witzke / Abraxas-Verlag
Metasideronatrite: Na2Fe+++(SO4)2(OH)·(H2O) Tamarugite: NaAl(SO4)2·6(H2O)
Comments: Orange metasideronatrite with white tamarugite. Location: Willi Agatz Mine, Dresden, Saxony, Germany. Scale: Picture size 5 mm. © Thomas Witzke / Abraxas-Verlag
Metasideronatrite: Na2Fe+++(SO4)2(OH)·(H2O) Ungemachite: K3Na8Fe+++(SO4)6(NO3)2·6(H2O)
Comments: Translucent rounded ungemachite microcrystal on yellow metasideronatrite. Location: Chuquicamata, Antofagasta, Chile. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species