Wendwilsonite Mineral Data + Say WENDWILSONITE

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.
 

Wendwilsonite Image

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Wendwilsonite

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 - PrismaticH-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 Diaphaniety: Diaphaniety: 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
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:

relectron=3.40 gm/cc
note: rWendwilsonite =3.53 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.0047
Boson Index = 0.9953
Help on Photoelectric: Photoelectric:

PEWendwilsonite = 27.25 barns/electron
U=PEWendwilsonite x relectron= 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: 40.2.3.4 (40)Hydrated Phosphates, etc
  (40.2)where A++ (B++)2 (XO4) · x(H2O)
  (40.2.3)Roselite Subgroup (Monoclinic: P21/c)
 
40.2.3.1 Roselite Ca2(Co,Mg)(AsO4)2·2(H2O) P 21/c 2/m
 
40.2.3.2 Brandtite Ca2(Mn,Mg)(AsO4)2·2(H2O) P 21/c 2/m
 
40.2.3.3 Zincroselite Ca2Zn(AsO4)2·2(H2O) P 21/c 2/m
 
40.2.3.4 Wendwilsonite Ca2(Mg,Co)(AsO4)2·2(H2O) P 21/c 2/m
 
40.2.3.5 Manganlotharmeyerite! Ca(Mn,Mg,)2(AsO4)2(OH,H2O)2 C 2/m 2/m
Help on  Strunz Class: Strunz Class: VII/C.17-90 VII - Phosphates, Arsenates and Vanadates
  VII/C - Water-bearing phosphates without unfamiliar anions, cations of medium and big size: Fe, Mn, Zn, Mg and Ca, (NH4)1+
  VII/C.17 - Collinsite - Wendwilsonite series
 
VII/C.17-10 Collinsite Ca2(Mg,Fe)(PO4)2·2(H2O) P1 1
 
VII/C.17-15 Hillite! Ca2(Zn,Mg)[PO4]2·2(H2O) P1 1
 
VII/C.17-20 Messelite Ca2(Fe,Mn)(PO4)2·2(H2O) P1 1
 
VII/C.17-30 Fairfieldite Ca2(Mn,Fe)(PO4)2·2(H2O) P1 1
 
VII/C.17-40 Cassidyite Ca2(Ni,Mg)(PO4)2·2(H2O) P1 1
 
VII/C.17-50 Talmessite Ca2Mg(AsO4)2·2(H2O) P1 1
 
VII/C.17-60 Gaitite Ca2Zn(AsO4)2·2(H2O) P1 1
 
VII/C.17-70 Parabrandtite Ca2Mn(AsO4)·2(H2O) P1,P 1 Tri
 
VII/C.17-80 Roselite-beta Ca2(Co,Mg)(AsO4)2·2(H2O) P 1 or P1 Tri
 
VII/C.17-90 Wendwilsonite Ca2(Mg,Co)(AsO4)2·2(H2O) P 21/c 2/m
 
VII/C.17-100 Roselite Ca2(Co,Mg)(AsO4)2·2(H2O) P 21/c 2/m
 
VII/C.17-110 Brandtite Ca2(Mn,Mg)(AsO4)2·2(H2O) P 21/c 2/m
 
VII/C.17-120 Zincroselite Ca2Zn(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 - Franklin Minerals(Dunn) 5 -Google Images 6 -Google Scholar 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 -École des Mines de Paris

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

Wendwilsonite

Ca2(Mg,Co)(AsO4)2·2(H2O)
Dana No: 40.2.3.4 Strunz No: VII/C.17-90
Locality:

 

Notes:

 

 
   
 
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