tachyhydrite
Sign in to saveTachyhydrite is an unstable mineral, a hydrous chloride of calcium and magnesium with formula: CaMg2Cl6·12H2O. It is a rare component of marine evaporite salt deposits. Upon exposure to moist air it rapidly deliquesces and dissolves.
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- Tachyhydrite
- IMA Mineral Symbol
- Thy
- Nickel-Strunz '10th ed', review of (9th ed/ 2009 update)
- 3.BB.35
- Nickel-Strunz 9th edition (updated 2009)
- 3.BB.35
- chemical formula
- CaMg₂Cl₆·12H₂O
- Strunz 8th edition (series ID, updated)
- III/B.08
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Tachyhydrite is an unstable mineral, a hydrous chloride of calcium and magnesium with formula: CaMg2Cl6·12H2O. It is a rare component of marine evaporite salt deposits. Upon exposure to moist air it rapidly deliquesces and dissolves.
It forms a colorless to yellow trigonal crystal with a vitreous luster. It is soft with a Mohs hardness of 2 and has a low specific gravity of 1.66. It has good cleavage in three directions and typically occurs in crystalline masses.