Mineralogy Database

Wendwilsonite Mineral Data

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General Wendwilsonite Information

Help on Chemical  Formula: Chemical Formula: Ca2(Mg,Co)(AsO4)2•2(H2O)
Help on Composition: Composition: Molecular Weight = 426.99 gm
   Calcium    18.77 %  Ca   26.27 % CaO
   Magnesium   4.27 %  Mg    7.08 % MgO
   Cobalt      3.45 %  Co    4.39 % CoO
   Arsenic    35.09 %  As   53.83 % As2O5
   Hydrogen    0.94 %  H     8.44 % H2O
   Oxygen     37.47 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca2Mg0.75Co0.25(AsO4)2•2(H2O)
Help on Environment: Environment: Found with calcite on serpentine in franklinite-willemite ore.
Help on IMA Status: IMA Status: Approved IMA 1987
Help on Locality: Locality: Sterling Hill mine, Ogdensburg, New Jersy, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Wendell E. Wilson (1946-), mineralogist, editor, and publisher of the Mineralogical Record.
Help on Name Pronunciation: Name Pronunciation: Wendwilsonite Say WENDWILSONITE

Wendwilsonite Image

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Comments: Gemmy crystals of wendwilsonite to 4 mm.
Location: Bou Azzer, Anti-Atlas Mts., Morocco. Scale: Picture size .5 cm.
© John Veevaert

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  Wendwilsonite   Minrecordite

Comments: Wendell Wilson, publisher, editor-in-chief of the Mineralogical Record, and the person whom wendwilsonite was named after, kindly provided the mineral name pronunciations for minrecordite and wendwilsonite.
Location: Tucson Convention Center, 50th Tucson Gem and Mineral Show, February 14, 2004. Scale: NA.
© Dave Barthelmy

Wendwilsonite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.4496:1:0.4354
Help on Cell Dimensions: Cell Dimensions: a = 5.806, b = 12.912, c = 5.623, Z = 2; beta = 107.4° V = 402.25 Den(Calc)= 3.53
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): 2.994(1), 2.766(0.8), 3.226(0.6),

Physical Properties of Wendwilsonite

Help on Cleavage: Cleavage: {010} Perfect
Help on Color: Color: Light pink, Dark pink, Red.
Help on Density: Density: 3.52
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Hardness: Hardness: 3-4 - Calcite-Fluorite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: light pink

Optical Properties of Wendwilsonite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.035 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.032 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1992,KPDmeas= 0.1998,KC= 0.1931
Ncalc = 1.68
Help on Optical Data: Optical Data: Biaxial (+), a=1.694, b=1.703, g=1.713, bire=0.0190, 2V(Calc)=88, 2V(Meas)=87. Dispersion r < v.
Help on Pleochroism (x): Pleochroism (x): violet pink.
Help on Pleochroism (y): Pleochroism (y): rose pink.
Help on Pleochroism (z): Pleochroism (z): colorless.

Calculated Properties of Wendwilsonite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.40 gm/cc
note: Specific Gravity of Wendwilsonite =3.53 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0047038609
Boson Index = 0.9952961391
Help on Photoelectric: Photoelectric: PEWendwilsonite = 27.25 barns/electron
U=PEWendwilsonite x rElectron Density= 92.72 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Wendwilsonite is Not Radioactive

Wendwilsonite Classification

Help on  Dana Class: Dana Class: (40)Hydrated Phosphates, etc
  (40.02)where A++ (B++)2 (XO4) � x(H2O)
  (40.02.03)Roselite Subgroup (Monoclinic: P21/c) Roselite Ca2(Co,Mg)(AsO4)2•2(H2O) P 21/c 2/m Brandtite Ca2(Mn,Mg)(AsO4)2•2(H2O) P 21/c 2/m Zincroselite Ca2Zn(AsO4)2•2(H2O) P 21/c 2/m Wendwilsonite Ca2(Mg,Co)(AsO4)2•2(H2O) P 21/c 2/m Manganlotharmeyerite! Ca(Mn,Mg,)2(AsO4)2(OH,H2O)2 C 2/m 2/m
Help on  Strunz Class: Strunz Class: 08.CG.10 08 - PHOSPHATES, ARSENATES, VANADATES
  08.C - Phosphates without Additional Anions, with H2O
  08.CG -With large and medium-sized cations, RO4:H2O = 1:1
08.CG.10 Brandtite Ca2(Mn,Mg)(AsO4)2•2(H2O) P 21/c 2/m
08.CG.10 Roselite Ca2(Co,Mg)(AsO4)2•2(H2O) P 21/c 2/m
08.CG.10 Roselite-beta Ca2(Co,Mg)(AsO4)2•2(H2O) P 1 or P1 Tri
08.CG.10 Zincroselite Ca2Zn(AsO4)2•2(H2O) P 21/c 2/m
08.CG.10 Wendwilsonite Ca2(Mg,Co)(AsO4)2•2(H2O) P 21/c 2/m

Other Wendwilsonite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Am.Min.,Vol.72,p217-221,1987) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Wendwilsonite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Franklin Minerals(Dunn)
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info

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Dana No: Strunz No: 08.CG.10





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