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Formula: Na3H(SO4)2
Anhydrous sulphate
Crystal system: Monoclinic
Specific gravity: 2.406 calculated
Streak: White
Colour: Colourless
Solubility: Unstable in natural conditions and is covered by a white crust, after long exposure to air
Environments
Hydrothermal environments
Fumeroles
Ivsite is a relatively new mineral, approved in 2013.
Localities
At the type locality, the Great Fissure eruption, Tolbachik Volcanic field, Milkovsky District, Kamchatka Krai,
Russia, crystals of ivsite were discovered in a cavity of an intensely gassing fumarole, near an output of
liquid lava flowing in a hidden channel, 3 km from the eruptive centre. The ivsite surface is somewhere
incrusted with green, greenish turquoise, white turquoise, and white mineral aggregates. The temperature reached
500°С at a depth of 30 cm. Associated minerals include thénardite and
aphthitalite. In addition,
secondary hydrous minerals, such as
matteuccite and krohnkite
were registered.
Ivsite occurs in fine granular aggregates composed of tabular crystals; it is transparent and colourless, and
its powder has a white colour
(Doklady Earth Sciences 468.2.632-635).
Ivsite from the Great Fissure Eruption -
Image
At the Blue Lizard Mine, Red Canyon Mining District, San Juan County, Utah, USA, ivsite occurs as a
secondary mineral in the post-mining oxidation zone of
asphaltum-rich sandstone beds laced with
uraninite and sulphides in a damp underground environment. Associated
minerals include copiapite,
ferrinatrite, metavoltine,
römerite, seaborgite and
gypsum
(HOM).
Ivsite from the Blue Lizard Mine -
Image
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