Mineralogy Database

Chlorothionite Mineral Data

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General Chlorothionite Information

Help on Chemical  Formula: Chemical Formula: K2Cu(SO4)Cl2
Help on Composition: Composition: Molecular Weight = 308.71 gm
   Potassium  25.33 %  K    30.51 % K2O
   Copper     20.58 %  Cu   25.77 % CuO
   Sulfur     10.39 %  S    25.93 % SO3
   Chlorine   22.97 %  Cl   22.97 % Cl
                -   %   Cl   -5.18 % -O=Cl2   
   Oxygen     20.73 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: K2Cu(SO4)Cl2
Help on Environment: Environment: Sublimates around volcanic fumaroles.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1872
Help on Locality: Locality: Vesuvius, Campania, Italy. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named from the Greek for chlorine and sulfur in the composition.
Help on Synonym: Synonym: ICSD 22364
  PDF 29-998

Chlorothionite Image

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Comments: Pale blue granular crystalline chlorothionite.
Location: Vesuvius, Napoli, Campania, Italy. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Chlorothionite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.2717:1:2.6804
Help on Cell Dimensions: Cell Dimensions: a = 7.73, b = 6.078, c = 16.292, Z = 4; V = 765.45 Den(Calc)= 2.68
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P nma

Physical Properties of Chlorothionite

Help on Cleavage: Cleavage: {???} Good
Help on Color: Color: Light blue.
Help on Density: Density: 2.69
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Streak: Streak: white

Optical Properties of Chlorothionite

Help on Optical Data: Optical Data: NCalc= 1.6 - from Gladstone-Dale relationship (KC = 0.2221) where Ncalc=Dcalc*KC+1
NCalc= 1.6 - from Gladstone-Dale relationship (KC = 0.2221) where Ncalc=Dmeas*KC+1

Calculated Properties of Chlorothionite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.59 gm/cc
note: Specific Gravity of Chlorothionite =2.68 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0009089307
Boson Index = 0.9990910693
Help on Photoelectric: Photoelectric: PEChlorothionite = 13.72 barns/electron
U=PEChlorothionite x relectron= 35.49 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 352.79 (Gamma Ray American Petroleum Institute Units)
Concentration of Chlorothionite per GRapi unit = 0.28 (%)

Estimated Radioactivity from Chlorothionite - barely detectable


Chlorothionite Classification

Help on  Dana Class: Dana Class: (30)Anhydrous Sulfates Containing Hydroxyl or Halogen
  (30.01)where (A B)m (XO4)p Zq where m:p>2:1
  (30.01.11)Dana Group Chlorothionite K2Cu(SO4)Cl2 P nma 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 07.BC.25 07 - SULFATES (SELENATES, TELLURATES)
  07.B - Sulfates (selenates, etc.) with Additional Anions, without H2O
  07.BC -With medium-sized and large cations
07.BC.25 Chlorothionite K2Cu(SO4)Cl2 P nma 2/m 2/m 2/m

Other Chlorothionite Information

Help on References: References: NAME( AntBidBlaNic5) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Chlorothionite :
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

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Dana No: Strunz No: 07.BC.25





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