Caminite Mineral Data

General Caminite Information
Chemical Formula:	Mg7(SO4)5(OH)4•(H2O)
Composition:	Molecular Weight = 736.50 gm
	Magnesium 23.10 % Mg 38.31 % MgO
	Hydrogen 0.82 % H 7.34 % H₂O
	Sulfur 21.77 % S 54.35 % SO₃
	Oxygen 54.31 % O
	______ ______
	100.00 % 100.00 % = TOTAL OXIDE
Empirical Formula:	Mg₇(SO₄)₅(OH)₄•(H₂O)
Environment:	Formed by the reaction of sea water with hydrothermal fluids in a midocean ridge submarine chimney vent. Unstable below 130 deg C., below which it hydrates and redissolves in sea wa ter.
IMA Status:	Approved IMA 1983
Locality:	Along the East Pacific Rise at 21deg N Lat. Link to MinDat.org Location Data.
Name Origin:	Named from the Latin caminus, for chimney, as the mineral occurs in undersea black-smoker chimneys.
Synonym:	ICSD 66174
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