Wattevilleite Mineral Data

General Wattevilleite Information

Chemical Formula:

Na2Ca(SO4)2•4(H2O) (?)

Composition:

Molecular Weight = 350.25 gm

Sodium 13.13 % Na 17.70 % Na₂O

Calcium 11.44 % Ca 16.01 % CaO

Hydrogen 2.30 % H 20.57 % H₂O

Sulfur 18.31 % S 45.72 % SO₃

Oxygen 54.82 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Na₂Ca(SO₄)₂•4(H₂O)

Environment:

A questionable species. Associated with other sulfates in a pyritic lignite.

IMA Status:

Valid Species (Pre-IMA) 1879

Locality:

Einigkeit mine, Bauersberg, near Bischofsheim, Bavaria, Germany. Link to MinDat.org Location Data.

Name Origin:

Named for Oscar de Watteville of Paris, France.

Name Pronunciation:

Wattevilleite + Pronunciation

Wattevilleite Image

Images:

Wattevilleite

Comments: White masses of wattervilleite scattered on lingite matrix. Label gives locality simply as Bischofsheim. Photographed under indirect natural light, hence the deep blue reflections and shadow areas.
Location: Einigkeit Mine, Bauersberg Mt., Bischofsheim, Rhön Mts, Franconia, Bavaria, Germany. Scale: Field of view 0.25 cm.
© Jeff Weissman / Photographic Guide to Mineral Species

Wattevilleite Crystallography

Crystal System:

OrthorhombicSpace Group: Unk

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

By Intensity(I/I_o): 4.39(1), 4.2(0.6), 2.89(0.5),2.95(0.5), 5.44(0.5), 2.67(0.4), 4.03(0.4), 5.1(0.4),

Physical Properties of Wattevilleite

Color:

White.

Density:

1.81

Habit:

Acicular - Occurs as needle-like crystals.

Habit:

Microscopic Crystals - Crystals visible only with microscopes.

Luster:

Silky

Streak:

white

Optical Properties of Wattevilleite

Gladstone-Dale:

CI meas= -0.139 (Poor) - where the CI = (1-KPDmeas/KC)
KPDmeas= 0.2484,KC= 0.2181
Ncalc = 1.39

Optical Data:

Biaxial (-), a=1.435, b=1.455, g=1.459, bire=0.0240, 2V(Calc)=46, 2V(Meas)=48. Dispersion dispersion not observed.

Calculated Properties of Wattevilleite

Electron Density:

Bulk Density (Electron Density)=1.84 gm/cc
note: Specific Gravity of Wattevilleite =1.81 gm/cc.

Fermion Index:

Fermion Index = 0.0017943435
Boson Index = 0.9982056565

Photoelectric:

PE_{Wattevilleite}= 2.74 barns/electron
U=PE_{Wattevilleite} x rElectron Density= 5.04 barns/cc.

Radioactivity:

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

Wattevilleite Classification

Dana Class:

29.03.04.01 (29)Hydrated Acid and Sulfates

(29.03)where (A+)2 B (XO4)2 · x(H2O)

(29.03.04)Dana Group

29.03.04.01 Wattevilleite Na2Ca(SO4)2•4(H2O)(?) Unk Ortho

Strunz Class:

07.CC.85 07 - SULFATES (SELENATES, TELLURATES)

07.C - Sulfates (selenates, etc.) without Additional Anions, with H2O

07.CC -With medium-sized and large cations

07.CC.85 Wattevilleite Na2Ca(SO4)2•4(H2O)(?) Unk Ortho

Other Wattevilleite Information

References:

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

See Also:

Links to other databases for Wattevilleite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - GeoScienceWorld
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
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 Wattevilleite Specimen Label here :

Wattevilleite

Na2Ca(SO4)2•4(H2O) (?)
Dana No: 29.03.04.01 Strunz No: 07.CC.85
Locality:

Notes: