Corrensite Mineral Data

General Corrensite Information
Chemical Formula:	(Ca,Na,K)(Mg,Fe,Al)9(Si,Al)8O20(OH)10•n(H2O)
Composition:	Molecular Weight = 1,227.19 gm
	Potassium 0.64 % K 0.77 % K₂O
	Sodium 0.37 % Na 0.51 % Na₂O
	Calcium 1.96 % Ca 2.74 % CaO
	Magnesium 9.90 % Mg 16.42 % MgO
	Aluminum 6.60 % Al 12.46 % Al₂O₃
	Iron 13.65 % Fe 17.56 % FeO
	Silicon 13.73 % Si 29.38 % SiO₂
	Hydrogen 2.30 % H 20.55 % H₂O
	Oxygen 50.85 % O
	______ ______
	100.00 % 100.39 % = TOTAL OXIDE
Empirical Formula:	Ca_0.6Na_0.2K_0.2Mg₅Fe²⁺₃AlSi₆Al₂O₂₀(OH)₁₀�9(H₂O)
Environment:	Authigenic chlorite mineral in sediments, hydrothermally altered materials, and igneous rocks. 1:1 regular interstratification of trioctahedral chlorite and trioctahedral smectite.
IMA Status:	Valid Species (Pre-IMA) 1954
Locality:	Zaiserweiher bei Maulbronn, Baden-Wurttenberg, Germany. Link to MinDat.org Location Data.
Name Origin:	Named for Carl Whilom Correns (1893-1980), German mineralogist and director of the Sedimentary Petrology Institute, University of Gottingen.
Synonym:	Swelling chlorite