Mineralogy Database

Hydrohalite Mineral Data

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General Hydrohalite Information

Help on Chemical  Formula: Chemical Formula: NaCl•2(H2O)
Help on Composition: Composition: Molecular Weight = 94.47 gm
   Sodium    24.33 %  Na   32.80 % Na2O
   Hydrogen   4.27 %  H    38.14 % H2O
   Chlorine  37.53 %  Cl   37.53 % Cl
               -   %   Cl   -8.47 % -O=Cl2   
   Oxygen    33.87 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: NaCl•2(H2O)
Help on Environment: Environment: Halite saturated brines in cold weather (-5 deg. C).
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1847
Help on Locality: Locality: Salzburg, Germany. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for its water content and similarity to halite in composition.
Help on Name Pronunciation: Name Pronunciation: Hydrohalite + Pronunciation Say HYDROHALITE
Help on Synonym: Synonym: ICSD 2313
  PDF 29-1197

Hydrohalite Image

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Comments: Synthetic crystals of hydrohalite in brine at -15 deg C.
Location: Laboratory-grown sea ice used to investigate the optical properties of cold sea ice. Scale: See Image.
© Bonnie Light / Applied Physics Laboratory U of Washington

Hydrohalite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.6257:1:0.6427
Help on Cell Dimensions: Cell Dimensions: a = 6.331, b = 10.118, c = 6.503, Z = 4; beta = 114.4° V = 379.36 Den(Calc)= 1.65
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.52(1), 2.67(1), 2.98(1),

Physical Properties of Hydrohalite

Help on Color: Color: Colorless, White.
Help on Density: Density: 1.605 - 1.63, Average = 1.61
Help on Diaphaneity: Diaphaneity: Transparent

Calculated Properties of Hydrohalite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=1.68 gm/cc
note: Specific Gravity of Hydrohalite =1.65 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0001689814
Boson Index = 0.9998310186
Help on Photoelectric: Photoelectric: PEHydrohalite = 2.85 barns/electron
U=PEHydrohalite x rElectron Density= 4.78 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Hydrohalite is Not Radioactive

Hydrohalite Classification

Help on  Dana Class: Dana Class: (09)Anhydrous and Hydrated Halides
  (09.01)where A X
  (09.01.02)Dana Group Hydrohalite NaCl•2(H2O) P 21/c 2/m
Help on  Strunz Class: Strunz Class: 03.BA.05 03 - HALIDES
  03.B - Simple Halides, with H2O
  03.BA -M:X = 1:1 and 2:3
03.BA.05 Hydrohalite NaCl•2(H2O) P 21/c 2/m

Other Hydrohalite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Hydrohalite :
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: 03.BA.05