Sulphohalite Mineral Data

Sulphohalite Mineral Data
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General Sulphohalite Information

Help on Chemical Formula: Chemical Formula: Na6(SO4)2FCl
Help on Composition: Composition: Molecular Weight = 384.52 gm
   Sodium    35.87 %  Na   48.36 % Na2O
   Sulfur    16.68 %  S    41.64 % SO3
   Chlorine   9.22 %  Cl    9.22 % Cl
               -   %   Cl   -2.08 % -O=Cl2   
   Oxygen    33.29 %  O
   Fluorine   4.94 %  F     4.94 % F
               -   %   F    -2.08 % -O=F2    
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na6(SO4)2FCl
Help on Environment: Environment: Continental evaporite deposits.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1888
Help on Locality: Locality: Searles Lake, San Bernardino Co., California. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after its composition of sulfate plus NaCl (halite). .
Help on Name Pronunciation: Name Pronunciation: Sulphohalite + Pronunciation Say SULPHOHALITE
 

Sulphohalite Image

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Sulphohalite

Comments: Octahedral sulphohalite crystal.
Location: Searles Lake, San Bernardino Co., California, USA. Scale: Crystal size 5 mm.
© John Veevaert

Sulphohalite Crystallography
Help on Cell Dimensions: Cell Dimensions: a = 10.065, Z = 4; V = 1,019.63 Den(Calc)= 2.50
Help on Crystal System: Crystal System: Isometric - HexoctahedralH-M Symbol (4/m 3 2/m) Space Group: F m3m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.56(1), 2.91(0.8), 1.779(0.65),
Click Here for Large Sulphohalite Structure Window Crystal Structure:

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Pabst A , Zeitschrift fur Kristallographie , 89 (1934) p.514-517, The crystal structure of sulphohalite

 

Physical Properties of Sulphohalite

Help on Cleavage: Cleavage: {???} Perfect
Help on Color: Color: Colorless, Green yellow, Gray, Grayish yellow, Light green yellow.
Help on Density: Density: 2.43
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Sub Conchoidal - Fractures developed in brittle materials characterized by semi-curving surfaces.
Help on Habit: Habit: Octahedral Crystals - Occurs as octahedral shaped crystals.
Help on Hardness: Hardness: 3.5 - Copper Penny
Help on Luminescence: Luminescence: Fluorescent and Phosphorescent, Long UV=bright white to creamy white.
Help on Luster: Luster: Vitreous - Greasy
Help on Magnetism: Magnetism: Nonmagnetic
Help on Streak: Streak: white
 

Optical Properties of Sulphohalite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.05 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.076 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.182,KPDmeas= 0.1872,KC= 0.197
Ncalc = 1.48 - 1.49
Help on Optical Data: Optical Data: Isotropic, n=1.455.
 

Calculated Properties of Sulphohalite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.38 gm/cc
note: Specific Gravity of Sulphohalite =2.43 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0014106732
Boson Index = 0.9985893268
Help on Photoelectric: Photoelectric: PESulphohalite = 2.20 barns/electron
U=PESulphohalite x rElectron Density= 5.24 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Sulphohalite is Not Radioactive
 

Sulphohalite Classification
Help on Dana Class: Dana Class: 30.01.07.01 (30)Anhydrous Sulfates Containing Hydroxyl or Halogen
  (30.01)where (A B)m (XO4)p Zq where m:p>2:1
  (30.01.07)Dana Group
 
30.01.07.01 Sulphohalite Na6(SO4)2FCl F m3m 4/m 3 2/m
Help on Strunz Class: Strunz Class: 07.BD.05 07 - SULFATES (SELENATES, TELLURATES)
  07.B - Sulfates (selenates, etc.) with Additional Anions, without H2O
  07.BD -With only large cations
 
07.BD.05 Sulphohalite Na6(SO4)2FCl F m3m 4/m 3 2/m
 

Other Sulphohalite Information
Help on References: References: NAME( MinRec) PHYS. PROP.(Collectors Book of Fluorescent Minerals) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Sulphohalite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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

Sulphohalite

Na6(SO4)2FCl
Dana No: 30.01.07.01 Strunz No: 07.BD.05
Locality:

 

Notes: