Hydrohalite Mineral Data

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General Hydrohalite Information

Chemical Formula:

NaCl•2(H2O)

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

Empirical Formula:

NaCl•2(H₂O)

Environment:

Halite saturated brines in cold weather (-5 deg. C).

IMA Status:

Valid Species (Pre-IMA) 1847

Locality:

Salzburg, Germany. Link to MinDat.org Location Data.

Name Origin:

Named for its water content and similarity to halite in composition.

Name Pronunciation:

Hydrohalite + Pronunciation

Synonym:

ICSD 2313

PDF 29-1197

Hydrohalite Image

Images:

Hydrohalite

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

Axial Ratios:

a:b:c =0.6257:1:0.6427

Cell Dimensions:

a = 6.331, b = 10.118, c = 6.503, Z = 4; beta = 114.4° V = 379.36 Den(Calc)= 1.65

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/c

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 2.52(1), 2.67(1), 2.98(1),

Crystal Structure:

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Klewe B , Pedersen B , Acta Crystallographica, Section B , 30 (1974) p.2363-2371, The crystal structure of sodium chloride dihydrate, Locality: synthetic

Physical Properties of Hydrohalite

Color:

Colorless, White.

Density:

1.605 - 1.63, Average = 1.61

Diaphaneity:

Transparent

Calculated Properties of Hydrohalite

Electron Density:

Bulk Density (Electron Density)=1.68 gm/cc
note: Specific Gravity of Hydrohalite =1.65 gm/cc.

Fermion Index:

Fermion Index = 0.0001689814
Boson Index = 0.9998310186

Photoelectric:

PE_Hydrohalite= 2.85 barns/electron
U=PE_Hydrohalite x rElectron Density= 4.78 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Hydrohalite is Not Radioactive

Hydrohalite Classification

Dana Class:

09.01.02.01 (09)Anhydrous and Hydrated Halides

(09.01)where A X

(09.01.02)Dana Group

09.01.02.01 Hydrohalite NaCl•2(H2O) P 2₁/c 2/m

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

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990)

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

Hydrohalite

NaCl•2(H2O)
Dana No: 09.01.02.01 Strunz No: 03.BA.05
Locality:

Notes: