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Corrensite: (Ca,Na,K)(Mg,Fe,Al)9(Si,Al)8O20(OH)10·n(H2O)
Comments: Platy, authigenic chloritic mixed-layer clays (Corrensite?), lining the pore spaces of a sandstone. SEM image from a core sample. Location: Unknown. Scale: Picture size 33 µ-m. © OMNI Laboratories, Inc
Comments: White earthy crust of corrensite on matrix. Location: Bolet, Varmland, Sweden. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species