Wendwilsonite Mineral Data

Wendwilsonite Mineral Data +

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] [About.com] [All-The-Web] [HotBot] [Ixquick] [LookSmart] [MAMMA] [MSN.COM] [Netscape] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Wendwilsonite :
AA Mineral Specimens
A-Rocks Auction
Adams Minerals
B and L Minerals
Dakota Matrix
Dan Weinrich Fine Minerals
Dan Weinrich Auctions
e-Rocks Auctions
Excalibur Minerals
Exceptional Minerals
Fabre Minerals
Greenside Minerals
John Betts Fine Minerals
Masons Minerals
Mineral News
Mineral of the Month Club
MineralsWeb Fine Minerals
Minernet.it
Rockshop.cz Kalat Fine Minerals
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: