Wermlandite Mineral Data + Say WERMLANDITE


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General Wermlandite Information
Help on Chemical Formula: Chemical Formula: (Ca,Mg)Mg7(Al,Fe+++)2(SO4)2(OH)18·12(H2O)
Help on Composition: Composition: Molecular Weight = 989.11 gm
   Calcium     3.04 %  Ca    4.25 % CaO
   Magnesium  17.82 %  Mg   29.54 % MgO
   Aluminum    4.09 %  Al    7.73 % Al2O3
   Iron        2.82 %  Fe    4.04 % Fe2O3
   Hydrogen    4.28 %  H    38.25 % H2O
   Sulfur      6.48 %  S    16.19 % SO3
   Oxygen     61.47 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca0.75Mg7.25Al1.5Fe3+0.5(SO4)2(OH)18·12(H2O)
Help on Environment: Environment: Associated with calcite and magnetite.
Help on IMA Status: IMA Status: Approved IMA 1971
Help on Locality: Locality: Långban mine, Bergslagen ore district, Filipstad, Värmland (Wermland), Sweden. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after the locality.
Help on Synonym: Synonym: ICSD 30887
  PDF 25-153
 

Wermlandite Image

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Wermlandite

Comments: Dark colored, hexagonal platelet of wermlandite on matrix.
Location: Langban, Varmland, Sweden. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Wermlandite Crystallography
Help on Axial Ratios: Axial Ratios: a:c = 1:2.42609
Help on Cell Dimensions: Cell Dimensions: a = 9.303, c = 22.57, Z = 2; V = 1,691.64 Den(Calc)= 1.94
Help on Crystal System: Crystal System: Trigonal - Hexagonal ScalenohedralH-M Symbol (3 2/m) Space Group: P 3c1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 7.98(1), 11.16(0.7), 4.63(0.5),
 

Physical Properties of Wermlandite

Help on Cleavage: Cleavage: [0001] Perfect
Help on Color: Color: Bluish, Greenish gray.
Help on Density: Density: 1.932
Help on Fracture: Fracture: Micaceous - Fracture of flexable micaceous cleavage fragments.
Help on Habit: Habit: Hexagonal - Six-sided crystal shape in cross-section or habit.
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Habit: Habit: Thin - Flat dimensioned crystals.
Help on Hardness: Hardness: 1.5 - Between Talc and Gypsum
 

Optical Properties of Wermlandite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.012 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.016 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2513,KPDmeas= 0.2523,KC= 0.2554
Help on Optical Data: Optical Data: Uniaxial (-), e=1.482, w=1.493, bire=0.0110.
 

Calculated Properties of Wermlandite

Help on Electron Density: Electron Density:

relectron=2.00 gm/cc
note: rWermlandite =1.93 gm/cc.
Help on Fermion Index Fermion Index Fermion Index = 0.01924
Boson Index = 0.98076
Help on Photoelectric: Photoelectric:

PEWermlandite = 2.17 barns/electron
U=PEWermlandite x relectron= 4.34 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Wermlandite is Not Radioactive
 

Wermlandite Classification
Help on Dana Class: Dana Class: 31.3.2.1 (31)Hydrated Sulfates Containing Hydroxyl or Halogen
  (31.3)where (A+ B++)5 (XO4) Zq·x(H2O)
  (31.3.2)Dana Group
 
31.3.2.1 Wermlandite (Ca,Mg)Mg7(Al,Fe)2(SO4)2(OH)18·12(H2O) P 3c1 3 2/m
Help on Strunz Class: Strunz Class: VI/D.14-25 VI - Sulfates,Chromates,Molybdates and Tungstates
  VI/D - Water-bearing sulfates with unfamiliar anions. cations of medium and very big size
  VI/D.14 - Metavoltine - Slavikite series
 
VI/D.14-10 Metavoltine K4Na4(Fe,Zn)Fe6(SO4)12O2·20(H2O) P 3 3
 
VI/D.14-20 Motukoreaite Na2Mg38Al24(CO3)13(SO4)8(OH)108·56(H2O) R 3m 3 2/m
 
VI/D.14-22 Nikischerite! NaFe6Al3(SO4)2(OH)18(H2O)12 R 3 3
 
VI/D.14-23 Shigaite Mn7Al4(SO4)2(OH)22·8(H2O) R 3 3
 
VI/D.14-25 Wermlandite (Ca,Mg)Mg7(Al,Fe)2(SO4)2(OH)18·12(H2O) P 3c1 3 2/m
 
VI/D.14-30 Lannonite HCa4Mg2Al4(SO4)8F9·32(H2O) Unk Tetra
 
VI/D.14-40 Slavikite NaMg2Fe5(SO4)7(OH)6·33(H2O) R 3 3
 

Other Wermlandite Information
Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Wermlandite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - Scandinavian mineral gallery 13 - WWW-MINCRYST 14 -École des Mines de Paris

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Wermlandite

(Ca,Mg)Mg7(Al,Fe+++)2(SO4)2(OH)18·12(H2O)
Dana No: 31.3.2.1 Strunz No: VI/D.14-25
Locality:

 

Notes:

 
 
   
 
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