Wermlandite Mineral Data

Wermlandite Mineral Data
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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 Name Pronunciation: Name Pronunciation: Wermlandite + Pronunciation Say WERMLANDITE
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),
Click Here for Large Wermlandite Structure Window Crystal Structure:

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drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
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S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
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B - Bonds On/Off
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Rius J , Allmann R , Zeitschrift fur Kristallographie , 168 (1984) p.133-144, The superstructure of the double layer mineral wermlandite, [Mg7(Al0.57,Fe3+0.43)2(OH)18]2+[(Ca0.6,Mg0.4)(SO4)2(H2O)12]2-, Locality: Langban, Warmland, Sweden

 

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
Ncalc = 1.49 - 1.5
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: Bulk Density (Electron Density)=2.00 gm/cc
note: Specific Gravity of Wermlandite =1.93 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEWermlandite = 2.17 barns/electron
U=PEWermlandite x rElectron Density= 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: 31.03.02.01 (31)Hydrated Sulfates Containing Hydroxyl or Halogen
  (31.03)where (A+ B++)5 (XO4) Zq·x(H2O)
  (31.03.02)Dana Group
 
31.03.02.01 Wermlandite (Ca,Mg)Mg7(Al,Fe)2(SO4)2(OH)18•12(H2O) P 3c1 3 2/m
Help on Strunz Class: Strunz Class: 07.DD.35 07 - SULFATES (SELENATES, TELLURATES)
  07.D - Sulfates (selenates, etc.) with additional anions, with H2O
  07.DD -With only medium-sized cations; sheets of edge-sharing octahedra
 
07.DD.35 Carrboydite (Ni,Cu)14Al9(SO4,CO3)6(OH)43•7(H2O) Unk Hex
 
07.DD.35 Glaucocerinite (Zn,Cu)5Al3(SO4)1.5(OH)16•9(H2O) Unk (HEX-R) Trig
 
07.DD.35 Honessite Ni6Fe2(SO4)(OH)16•4(H2O) R 3m 3 2/m
 
07.DD.35 Hydrowoodwardite! Cu1-xAlx(OH)2(SO4)x/2•n(H2O)with0<x<0.67andn>3x/2 R 3m 3 2/m
 
07.DD.35 Zincowoodwardite! [Zn1-xAlx(OH)2][(SO4)x/2(H2O)n] P 3- or R 3m 3
 
07.DD.35 Hydrohonessite Ni6Fe2(SO4)(OH)16•7(H2O) Unk Hex
 
07.DD.35 Motukoreaite Na2Mg38Al24(CO3)13(SO4)8(OH)108•56(H2O) R 3m 3 2/m
 
07.DD.35 Mountkeithite (Mg,Ni)11(Fe,Cr)3(SO4,CO3)3.5(OH)24•11(H2O) Unk Hex
 
07.DD.35 Shigaite Mn7Al4(SO4)2(OH)22•8(H2O) R 3 3
 
07.DD.35 Natroglaucocerinite! (Na,Zn,Cu)10Al6(SO4)3(OH)32•18(H2O)? Unk
 
07.DD.35 Wermlandite (Ca,Mg)Mg7(Al,Fe)2(SO4)2(OH)18•12(H2O) P 3c1 3 2/m
 
07.DD.35 Nikischerite! NaFe6Al3(SO4)2(OH)18(H2O)12 R 3 3
 
07.DD.35 Zincaluminite Zn6Al6(SO4)2(OH)26•5(H2O) Unk Hex
 
07.DD.35 Woodwardite Cu4Al2(SO4)(OH)12•2-4(H2O) Unk Hex
 
07.DD.35 Zincowoodwardite-3R! [Zn1BxAlx(OH)2][(SO4)x/2•n(H2O)],0.32<x<0.50,n=0.59 R 3m 3 2/m
 
07.DD.35 Zincowoodwardite-1T! [Zn1BxAlx(OH)2][(SO4)x/2•n(H2O)],x=0.33,n.0.96 P 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 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - Scandinavian mineral gallery
16 - WWW-MINCRYST

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

Wermlandite

(Ca,Mg)Mg7(Al,Fe+++)2(SO4)2(OH)18•12(H2O)
Dana No: 31.03.02.01 Strunz No: 07.DD.35
Locality:

 

Notes: