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Formula: Ca48Mg16Al(SiO3OH)4(CO3)16(BO3)28.(H2O)3(HCl)3
Compound borate, forms a solid solution with
harkerite
Crystal System: Isometric
Specific gravity: 2.78 to 2.83 measured, 2.79 calculated
Hardness: 5
Streak: White
Colour: Colourless, grey to greyish white
Solubility: Readily soluble in acids, even acetic acid (AM 51.1817)
Environments
Localities
At the Dayishan Sn-polymetallic ore field, Changning county, Hengyang, Hunan, China, sakhaite is associated with
szaibélyite, kotoite,
fluoborite, tin-bearing
ludwigite and forsterite
(HOM).
At the type locality, the Titovskoe B deposit, Tas-Khayakhtakh Range, Dogdo River Basin, Polar Yakutia, Sakha Republic,
Russia,
sakhaite
occurs in several areas separated by 25 km of magnesian skarn at the
contact of a
granitic massif with
dolostone. It
occurs in
lenslike bodies formed by the partial or complete replacement of kotoite
marble. Associated minerals include
kotoite,
clinohumite, forsterite,
suanite and spinel, and later
ludwigite, szaibélyite and
sphalerite. Alteration products of sakhaite include
szaibélyite, calcite and
borcarite
(AM 51.1817).
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