Hydrophilite Mineral Data

General Hydrophilite Information

Chemical Formula:

CaCl2

Composition:

Molecular Weight = 110.98 gm

Calcium 36.11 % Ca 50.53 % CaO

Chlorine 63.89 % Cl 63.89 % Cl

- % Cl -14.42 % -O=Cl₂

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

CaCl₂

Environment:

Found with anhydrite, gypsum and halite. Hydrophillite (1813) was inadequately characterized and is probably antarcticite or sinjarite.

IMA Status:

Discredited IMA 2006

Locality:

Luneberg, Hannover, Germany Link to MinDat.org Location Data.

Name Origin:

From the Greek hydros = "water" and philos = 'friend' in allusion to the highly deliquescent nature of the mineral.

Synonym:

ICSD 26686

PDF 24-223

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Hydrophilite Crystallography

Axial Ratios:

a:b:c =0.9704:1:0.6531

Cell Dimensions:

a = 6.24, b = 6.43, c = 4.2, Z = 2; V = 168.52 Den(Calc)= 2.19

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pnnm

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

By Intensity(I/I_o): 3.05(1), 4.48(0.9), 2.33(0.5),2.86(0.4), 1.91(0.3), 2.24(0.3), 2.36(0.3), 2.08(0.2),

Crystal Structure:

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Wyckoff R W G , Crystal Structures , 1 (1963) p.239-444, Second edition. Interscience Publishers, New York, New York, Note: distorted rutile structure

Physical Properties of Hydrophilite

Color:

White.

Density:

2.22

Diaphaneity:

Transparent to translucent

Habit:

Deliquescent - Crystals absorb water from the air and melt or otherwise deteriorate.

Habit:

Pseudo Cubic - Crystals show a cubic outline.

Habit:

Twinning Common - Crystals are usually twinned.

Luster:

Vitreous - Greasy

Streak:

white

Optical Properties of Hydrophilite

Optical Data:

Biaxial (+), a=1.6, b=1.605, g=1.613, bire=0.0130, 2V(Calc)=78, 2V(Meas)=50.

Calculated Properties of Hydrophilite

Electron Density:

Bulk Density (Electron Density)=2.13 gm/cc
note: Specific Gravity of Hydrophilite =2.19 gm/cc.

Fermion Index:

Fermion Index = 0.000487508
Boson Index = 0.999512492

Photoelectric:

PE_Hydrophilite= 8.70 barns/electron
U=PE_Hydrophilite x rElectron Density= 18.55 barns/cc.

Radioactivity:

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

Hydrophilite Classification

Dana Class:

09.02.07.02 (09)Anhydrous and Hydrated Halides

(09.02)where A (X)2

(09.02.07)Cotunnite Group

09.02.07.01 Cotunnite PbCl2 Pnam 2/m 2/m 2/m

09.02.07.02 Hydrophilite? CaCl2 Pnnm 2/m 2/m 2/m

09.02.07.03 Coccinite! HgI2(?) P 4₁/nmc 4/m 2/m 2/m

Strunz Class:

03.XX.00 03 - Halogenides

03.X - Unclassified Strunz Halogenides

03.XX -Chloride

03.XX.00 Hydrophilite? CaCl2 Pnnm 2/m 2/m 2/m

03.XX.00 Hydromolysite? FeCl3•6(H2O) C 2/m 2/m

03.XX.00 Lorettoite? Pb7O6Cl2 pseudo-TET Ortho

03.XX.00 Yttrocerite* CaF2(Y,Ce)F3 Unk Cubic

03.XX.00 IMA2009-014 SrF2 F m3m 4/m 3 2/m

03.XX.00 IMA2009-015 NaSrCeF6 P 6₃/m 6/m

Other Hydrophilite Information

References:

NAME( Ford32) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Hydrophilite :
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
13 - WWW-MINCRYST

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

Hydrophilite

CaCl2
Dana No: 09.02.07.02 Strunz No: 03.XX.00
Locality:

Notes: