Wattevillite Mineral Data + Say WATTEVILLITE

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General Wattevillite Information

Help on Chemical  Formula: Chemical Formula: Na2Ca(SO4)2•4(H2O) (?)
Help on Composition: 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
Help on Empirical Formula: Empirical Formula: Na2Ca(SO4)2•4(H2O)
Help on Environment: Environment: A questionable species. Associated with other sulfates in a pyritic lignite.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1879
Help on Locality: Locality: Einigkeit mine, Bauersberg, near Bischofsheim, Bavaria, Germany. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Oscar de Watteville of Paris, France.

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Wattevillite Crystallography

Help on Crystal System: Crystal System: OrthorhombicSpace Group: Unk
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 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 Wattevillite

Help on Color: Color: White.
Help on Density: Density: 1.81
Help on Habit: Habit: Acicular - Occurs as needle-like crystals.
Help on Habit: Habit: Microscopic Crystals - Crystals visible only with microscopes.
Help on Luster: Luster: Silky
Help on Streak: Streak: white

Optical Properties of Wattevillite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.139 (Poor) - where the CI = (1-KPDmeas/KC)
KPDmeas= 0.2484,KC= 0.2181
Help on Optical Data: 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 Wattevillite

Help on Electron Density: Electron Density:

relectron=1.84 gm/cc
note: rWattevillite =1.81 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.00179
Boson Index = 0.99821
Help on Photoelectric: Photoelectric:

PEWattevillite = 2.74 barns/electron
U=PEWattevillite x relectron= 5.04 barns/cc.

Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Wattevillite is Not Radioactive


Wattevillite Classification

Help on  Dana Class: Dana Class: (29)Hydrated Acid and Sulfates
  (29.3)where (A+)2 B (XO4)2 • x(H2O)
  (29.3.4)Dana Group Wattevillite Na2Ca(SO4)2•4(H2O)(?) Unk Ortho
Help on  Strunz Class: Strunz Class: VI/C.21-50 VI - Sulfates,Chromates,Molybdates and Tungstates
  VI/C - Water-bearing sulfates without unfamiliar anions. Cations of very big size
  VI/C.21 - Matteuccite - Mirabilite series
VI/C.21-10 Matteuccite NaHSO4•(H2O) Aa m
VI/C.21-20 Lecontite (NH4,K)Na(SO4)•2(H2O) P 212121 2 2 2
VI/C.21-30 Eugsterite Na4Ca(SO4)3•2(H2O) Unk. Mono
VI/C.21-40 Hydroglauberite Na4Ca(SO4)3•2(H2O) Unk. Ortho
VI/C.21-50 Wattevillite Na2Ca(SO4)2•4(H2O)(?) Unk Ortho
VI/C.21-60 Syngenite K2Ca(SO4)2•(H2O) P 21/m 2/m
VI/C.21-70 Koktaite (NH4)2Ca(SO4)2•(H2O) P 21/m 2/m
VI/C.21-80 Mirabilite Na2SO4•10(H2O) P 21/a 2/m

Other Wattevillite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Wattevillite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - Google Images
4 - Google Scholar
5 - Handbook of Mineralogy (MinSocAm)
6 - Handbook of Mineralogy (UofA)
7 - MinDAT
8 - MinMax(Deutsch)
9 - MinMax(English)
10 - Mineralienatlas (Deutsch)
11 - QUT Mineral Atlas
12 - Ruff.Info

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Na2Ca(SO4)2·4(H2O) (?)
Dana No: Strunz No: VI/C.21-50




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