Wendwilsonite Mineral Data

Wendwilsonite Mineral Data +

[Newest Minerals] [Minerals for Sale] [Educational Articles] [About Us] [Image Gallery]
John Betts - Fine Minerals
Classic minerals, out-of-print books & magazines, plus informative articles for collectors

General Wendwilsonite Information

Chemical Formula:

Ca2(Mg,Co)(AsO4)2·2(H2O)

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

Empirical Formula:

Ca₂Mg_0.75Co_0.25(AsO₄)₂·2(H₂O)

Environment:

Found with calcite on serpentine in franklinite-willemite ore.

IMA Status:

Approved IMA 1987

Locality:

Sterling Hill mine, Ogdensburg, New Jersy, USA. Link to MinDat.org Location Data.

Name Origin:

Named for Wendell E. Wilson (1946-), mineralogist, editor, and publisher of the Mineralogical Record.

Wendwilsonite Image

Images:

Wendwilsonite

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

Images:

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

Axial Ratios:

a:b:c =0.4496:1:0.4354

Cell Dimensions:

a = 5.806, b = 12.912, c = 5.623, Z = 2; beta = 107.4° V = 402.25 Den(Calc)= 3.53

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/c

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

By Intensity(I/I_o): 2.994(1), 2.766(0.8), 3.226(0.6),

Physical Properties of Wendwilsonite

Cleavage:

[010] Perfect

Color:

Light pink, Dark pink, Red.

Density:

3.52

Diaphaniety:

Transparent

Fracture:

Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Hardness:

3-4 - Calcite-Fluorite

Luminescence:

Non-fluorescent.

Luster:

Vitreous (Glassy)

Streak:

light pink

Optical Properties of Wendwilsonite

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

Optical Data:

Biaxial (+), a=1.694, b=1.703, g=1.713, bire=0.0190, 2V(Calc)=88, 2V(Meas)=87. Dispersion r < v.

Pleochroism (x):

violet pink.

Pleochroism (y):

rose pink.

Pleochroism (z):

colorless.

Calculated Properties of Wendwilsonite

Electron Density:

r_electron=3.40 gm/cc
note: r_{Wendwilsonite}=3.53 gm/cc.

Fermion Index

Fermion Index = 0.0047
Boson Index = 0.9953

Photoelectric:

PE_{Wendwilsonite}= 27.25 barns/electron
U=PE_{Wendwilsonite} x r_electron= 92.72 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Wendwilsonite is Not Radioactive

Wendwilsonite Classification

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

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

References:

NAME( Dana8) PHYS. PROP.(Am.Min.,Vol.72,p217-221,1987) OPTIC PROP.(Dana8)

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

Search for Wendwilsonite using:

[ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Wendwilsonite :

AA Mineral Specimens

B & L Fine Minerals

Crystal Vaults

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

John Betts Fine Minerals

Mason's Minerals

Mineral News

Mineral of the Month Club

MineralsWeb Fine Minerals

Rockshop.cz

T G Fine Minerals

Wrights Rock Shop

Translate Wendwilsonite Mineral Data :

Ask about Wendwilsonite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

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: