... paramètre b. Ce mécanisme de charnière fournit l’explication de l’anisotropie marquée du comportement thermique de la mélanothallite tel qu’observé par spectres de diffraction X obtenus sur poudre. (Traduit par la Rédaction) Abstract Crystals of synthetic melanothallite, Cu 2 OCl 2 , have been...

...Fig. 6 Composition diagram of the CuO–CuCl 2 –CuSeO 3 system with structural information amount per unit cell for crystalline compounds (values for different polymorphic modifications are separated by ‘/’). Legend for mineral names: Tn = tenorite, Mth = melanothallite, Tlb = tolbachite, Nsb...

... Breakthrough of the Great Tolbachik Fissure Eruption, Tolbachik volcano, Kamchatka, Russia. It is associated with euchlorine, fedotovite, hematite, tenorite, lyonsite, melanothallite, atlasovite, kamchatkite and secondary avdoninite, belloite and chalcanthite. Yaroshevskite forms isolated prismatic crystals...

... 2 ( Vergasova & Filatov 1983 ) and ponomarevite K 4 Cu 4 OCl 10 ( Vergasova et al . 1988 ) were first described, the naturally occurring avdoninite K 2 Cu 5 Cl 8 (OH) 4 · 2H 2 Owas first reported and completely studied ( Chukanov et al . 2006 , Pekov et al . 2015a ), and melanothallite Cu...

... connected (OM 4 ) framework structures such as mosesite ([ N](Cl,(SO 4 ),(CO 3 ),(H 2 O); Switzer et al. , 1953 ), kleinite ([Hg 2+ 2 N](SO 4 ) 0.25 Cl 0.5 ) (H 2 O) 0.5 ; Giester et al. , 1996 ), melanothallite (Cu 2 OCl 2 ; Krivovichev et al. , 2002 ) and cuprite (Cu 2 O). Fig. 4...

... prewittite has no close analogues among known minerals and inorganic compounds. In this paper, we report on its occurrence, physical properties, and crystal structure. Prewittite was found in the fumarole “Melanotallitovaya” (the name reflects abundance of melanothallite, Cu 2 OCl 2 ) on the Second...

... and bobjonesite formed as a result of the interaction of some primary anhydrous minerals with atmospheric water, a process frequently observed under laboratory conditions with minerals of fumarolic origin (e.g. formation of belloite, Cu(OH)Cl, as the result of reaction of melanothallite, Cu 2 OCl 2 , in moist air...

... very rarely on crusts that mainly consist of bright green euchlorine in association with fedotovite, hematite, tenorite, Cu-rich lyonsite, melanothallite, atlasovite, kamchatkite and secondary supergene avdoninite, belloite, and chalcanthite. Yaroshevskite forms isolated prismatic crystals up to 0.1...

... Fissure Tolbachik volcano eruption (1975–1976), Kamchatka Peninsula, Russia. It occurs as aggregates of red needle-like crystals up to 0.4 mm, elongated by [001]. The mineral is associated with chloromenite, prewittite, melanothallite, sophiite, ralstonite, ponomarevite, and native gold. Nicksobolevite...

... with pyrite and galena as inclusions in silicified clasts from hydrothermal breccias. Molybdenite is rarely present as inclusions in sphalerite. Supergene oxidized minerals include iron oxide/hydroxides (hematite, goethite, and limonite), cuprite, covellite, chalcocite, tenorite, cuprospinel, melanothallite...

... ). At Tolbachik the mineral was formed at temperature about 150–170 °C and found in sulfate crusts up to 2 cm thick in close association with euchlorine, fedotovite, chalcocyanite. Other associated minerals are: kamchatkite, atlasovite, alumoklyuchevskite, langbeinite, hematite, melanothallite, tenorite...

..., malladrite, melanothallite, mereheadite, molysite, moschelite, onoratoite, parkinsonite, perite, pinchite, poyarkovite, pseudocotunnite, radhakrishnaite, radtkeite, sinjarite, tedhadleyite, terlinguacreekite, tolbachite and vasilyevite. This is a very poor distribution, with only 38 species (~25...