metacinnabar, cubic, form, mercury, sulfide, high, temperature, form, trimorphous, with, cinnabar, trigonal, structure, higher, temperature, hypercinnabar, hexagonal, structure, occurs, with, cinnabar, mercury, deposits, associated, with, native, mercury, wurt. Metacinnabar is the cubic form of mercury sulfide HgS It is the high temperature form and trimorphous with cinnabar trigonal structure and the higher temperature hypercinnabar hexagonal structure It occurs with cinnabar in mercury deposits and is associated with native mercury wurtzite stibnite marcasite realgar calcite barite chalcedony and hydrocarbons 2 MetacinnabarGeneralCategorySulfide mineralFormula repeating unit HgSIMA symbolMcin 1 Strunz classification2 CB 05aCrystal systemCubicCrystal classHextetrahedral 4 3m H M symbol 4 3m Space groupF4 3mUnit cella 5 8717 5 A Z 4StructureJmol 3D Interactive imageIdentificationColorGrayish blackCrystal habitMassive rarely as tetrahedral crystals as incrustationsTwinningCommon as lamellae on 111 CleavageNoneFractureSubconchoidalTenacityBrittleMohs scale hardness3LusterMetallicStreakBlackDiaphaneityOpaqueSpecific gravity7 7 7 8References 2 3 4 It was first described in 1870 for an occurrence in the Redington mine Knoxville Napa County California 3 4 References Edit nbsp Wikimedia Commons has media related to Metacinnabar Warr L N 2021 IMA CNMNC approved mineral symbols Mineralogical Magazine 85 3 291 320 Bibcode 2021MinM 85 291W doi 10 1180 mgm 2021 43 S2CID 235729616 a b Metacinnabar in the Handbook of Mineralogy a b Metacinnabar on Mindat org a b Metacinnabar data on Webmineral nbsp This article about a specific sulfide mineral is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Metacinnabar amp oldid 1139068155, wikipedia, wiki, book, books, library,
