Corrensite Mineral Data


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General Corrensite Information

Help on Chemical  Formula: Chemical Formula: (Ca,Na,K)(Mg,Fe,Al)9(Si,Al)8O20(OH)10·n(H2O)
Help on Composition: 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
Help on Empirical Formula: Empirical Formula: Ca0.6Na0.2K0.2Mg5Fe2+3AlSi6Al2O20(OH)10·9(H2O)
Help on Environment: Environment: Authigenic chlorite mineral in sediments, hydrothermally altered materials, and igneous rocks. 1:1 regular interstratification of trioctahedral chlorite and trioctahedral smectite.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1954
Help on Locality: Locality: Zaiserweiher bei Maulbronn, Baden-Wurttenberg, Germany. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Carl Whilom Correns (1893-1980), German mineralogist and director of the Sedimentary Petrology Institute, University of Gottingen.
Help on Synonym: Synonym: Swelling chlorite
 

Corrensite Image

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Corrensite

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

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Corrensite

Comments: White earthy crust of corrensite on matrix.
Location: Bolet, Varmland, Sweden. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Corrensite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.5763:1:3.1857
Help on Cell Dimensions: Cell Dimensions: a = 5.337, b = 9.26, c = 29.5, Z = 2; V = 1,457.91 Den(Calc)= 2.80
Help on Crystal System: Crystal System: OrthorhombicSpace Group: Unk
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 14(1), 3.53(0.6), 7.08(0.6),2.57(0.3), 4.62(0.3), 4.72(0.3), 7.83(0.3), 29(0.3),
 

Physical Properties of Corrensite

Help on Cleavage: Cleavage: [001] Perfect
Help on Color: Color: White, Pink, Brown, Gray, Yellowish green.
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Microscopic Crystals - Crystals visible only with microscopes.
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Hardness: Hardness: 1-2 - Between Talc and Gypsum
Help on Luster: Luster: Earthy (Dull)
Help on Streak: Streak: white
 

Optical Properties of Corrensite

Help on Gladstone-Dale: Gladstone-Dale: CI calc= 0.089 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2103,KC= 0.2309
Help on Optical Data: Optical Data: Biaxial (-), a=1.56-1.585, b=1.582-1.612, g=1.582-1.612, bire=0.0220-0.0270, 2V(Calc)=0, 2V(Meas)=0-10.
Help on Pleochroism (x): Pleochroism (x): yellowish ocher.
Help on Pleochroism (y): Pleochroism (y): brownish green.
Help on Pleochroism (z): Pleochroism (z): brownish green.
 

Calculated Properties of Corrensite

Help on Electron Density: Electron Density:

relectron=2.82 gm/cc
note: rCorrensite =2.80 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.01948
Boson Index = 0.98052
Help on Photoelectric: Photoelectric:

PECorrensite = 5.24 barns/electron
U=PECorrensite x relectron= 14.79 barns/cc.

Help on Radioactivity: Radioactivity:

GRapi = 9.27 (Gamma Ray American Petroleum Institute Units)

Estimated Radioactivity from Corrensite - barely detectable

 

Corrensite Classification

Help on  Dana Class: Dana Class: 71.4.2.5 (71)Phyllosilicate Sheets of Six-Membered Rings
  (71.4)interlayered 1:1, 2:1, and octahedra
  (71.4.2)Interstratified Chlorite-Smectite group
 
71.4.2.1 Dozyite (Mg7Al2)(Si4Al2)O15(OH)12 Cm m
 
71.4.2.2 Lunijianlaite LiAl6(Si7Al)O20(OH)10 Unk Mono
 
71.4.2.3 Saliotite Na0.5Li0.5Al3AlSi3O10(OH)5 C 2/m 2/m
 
71.4.2.4 Tosudite Na0,5(Al,Mg)6(Si,Al)8O18(OH)12·5(H2O) Unk Ortho
 
71.4.2.5 Corrensite (Ca,Na,K)(Mg,Fe,Al)9(Si,Al)8O20(OH)10·n(H2O) Unk Ortho
 
71.4.2.6 Kulkeite Na0.35Mg8AlSi7O20(OH)10 Unk Mono
 
71.4.2.7 Rectorite (Na,Ca)Al4(Si,Al)8O20(OH)4·2(H2O) Unk Mono
 
71.4.2.8 Aliettite [Mg3Si4O10(OH)2](Ca0.5,Na)0.33(Al,Mg,Fe)2-3(Si,Al)4O10(OH)2·n(H2O) Unk Mono
 
71.4.2.9 Glagolevite! NaMg6[Si3AlO10](OH,O)8·H2O C1 1
Help on  Strunz Class: Strunz Class: VIII/H.18-60 VIII - Silicates
  VIII/H - Phyllosilicates (layered) Mica like with [Si4O10]4- and related groups
  VIII/H.18 - Smectite/Montmorillonite group
 
VIII/H.18-05 Lunijianlaite LiAl6(Si7Al)O20(OH)10 Unk Mono
 
VIII/H.18-07 Saliotite Na0.5Li0.5Al3AlSi3O10(OH)5 C 2/m 2/m
 
VIII/H.18-10 Kulkeite Na0.35Mg8AlSi7O20(OH)10 Unk Mono
 
VIII/H.18-20 Aliettite [Mg3Si4O10(OH)2](Ca0.5,Na)0.33(Al,Mg,Fe)2-3(Si,Al)4O10(OH)2·n(H2O) Unk Mono
 
VIII/H.18-30 Rectorite (Na,Ca)Al4(Si,Al)8O20(OH)4·2(H2O) Unk Mono
 
VIII/H.18-50 Tosudite Na0,5(Al,Mg)6(Si,Al)8O18(OH)12·5(H2O) Unk Ortho
 
VIII/H.18-60 Corrensite (Ca,Na,K)(Mg,Fe,Al)9(Si,Al)8O20(OH)10·n(H2O) Unk Ortho
 
VIII/H.18-70 Hydrobiotite [K(Mg,Fe)3(Al,Fe)Si3O10(OH,F)2]·[(Mg,Fe,Al)3(Si,Al)4O10(OH)2·4(H2O)] C 2/m 2/m
 

Other Corrensite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Corrensite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - Crocoite.com Mineral Locations 4 - EUROmin Project 5 -Google Images 6 -Google Scholar 7 -Handbook of Mineralogy (MinSocAm) 8 -Handbook of Mineralogy (UofA) 9 -MinDAT 10 -MinMax(Deutsch) 11 -MinMax(English) 12 -Mineralienatlas (Deutsch) 13 -QUT Mineral Atlas 14 -École des Mines de Paris

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Print or Cut-and-Paste your Corrensite Specimen Label here :

Corrensite

(Ca,Na,K)(Mg,Fe,Al)9(Si,Al)8O20(OH)10·n(H2O)
Dana No: 71.4.2.5 Strunz No: VIII/H.18-60
Locality:

 

Notes:

 

 
   
 
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