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Wendwilsonite

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Wendwilsonite

Bou Azer, Bou Azer District, Tazenakht, Ouarzazate Province, Drâa-Tafilalet Region, Morocco
Wendwilsonite

Bou Azer District, Tazenakht, Ouarzazate Province, Drâa-Tafilalet Region, Morocco
Wendwilsonite

Bou Azer District, Tazenakht, Ouarzazate Province, Drâa-Tafilalet Region, Morocco
Wendwilsonite

Bou Azer, Bou Azer District, Tazenakht, Ouarzazate Province, Drâa-Tafilalet Region, Morocco
Wendwilsonite

Bou Azer District, Tazenakht, Ouarzazate Province, Drâa-Tafilalet Region, Morocco
Wendwilsonite

Bou Azer District, Tazenakht, Ouarzazate Province, Drâa-Tafilalet Region, Morocco
Wendwilsonite

Bou Azer, Bou Azer District, Tazenakht, Ouarzazate Province, Drâa-Tafilalet Region, Morocco
Wendwilsonite

Bou Azer District, Tazenakht, Ouarzazate Province, Drâa-Tafilalet Region, Morocco
Wendell Wilson
Formula:
Ca2Mg(AsO4)2 · 2H2O
System:
Monoclinic
Colour:
Pale pink to red.
Lustre:
Vitreous
Hardness:
3 - 4
Member of:
Name:
Named in 1987 by Pete J. Dunn,, Bozidar Darko Sturman, Joseph A. Nelen in honor of Dr. Wendell E. Wilson, editor and publisher of the Mineralogical Record.
Isostructural with:
Brandtite
Roselite Group, Roselite-Wendwilsonite Series.

The magnesium analogue of Roselite.


Classification of Wendwilsonite

IMA status:
Approved
Approval Year:
1985
Strunz 8th ed.:
7/C.17-90
Nickel-Strunz 10th (pending) ed.:
8.CG.10

8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
G : With large and medium-sized cations, RO4:H2O = 1:1
Dana 8th ed.:
40.2.3.4

40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
2 : AB2(XO4)2·xH2O
Hey's CIM Ref.:
20.10.5

20 : Arsenates (also arsenates with phosphate, but without other anions)
10 : Arsenates of Co and Ni

Physical Properties of Wendwilsonite

Lustre:
Vitreous
Diaphaneity (Transparency):
Transparent, Translucent
Colour:
Pale pink to red.
Hardness (Mohs):
3 - 4
Density:
3.478 g/cm3 (Calculated)

Optical Data of Wendwilsonite

Type:
Biaxial (+)
RI values:
nα = 1.694 nβ = 1.703 nγ = 1.713
2V:
Measured: 87° , Calculated: 88°
Max Birefringence:
δ = 0.019
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
weak to distinct

Chemical Properties of Wendwilsonite

Formula:
Ca2Mg(AsO4)2 · 2H2O

Often contains some Co replacing Mg.
Elements listed in formula:
As, Ca, H, Mg, O - search for minerals with similar chemistry

Crystallography of Wendwilsonite

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Cell Parameters:
a = 5.806 Å, b = 12.923 Å, c = 5.628 Å
β = 107.49°
Ratio:
a:b:c = 0.449 : 1 : 0.436
Unit Cell Volume:
V 402.75 ų
Z:
2
X-Ray Powder Diffraction:
Image Loading

Radiation - Copper Kα
Data Set:
Data courtesy of RRUFF project at University of Arizona, used with permission.

Type Occurrence of Wendwilsonite

Co-type Localities:
Bou Azer District (Bou Azzer District), Tazenakht, Ouarzazate Province, Drâa-Tafilalet Region, Morocco
Sterling Mine, Sterling Hill, Ogdensburg, Franklin Mining District, Sussex Co., New Jersey, USA

Relationship of Wendwilsonite to other Species

Series:
Forms a series with Roselite (see here)
Member of:
Roselite Group
Other Members of Group:
BrandtiteCa2(Mn2+,Mg)(AsO4)2 · 2H2O
KröhnkiteNa2Cu(SO4)2 · 2H2O
RoseliteCa2(Co2+,Mg)(AsO4)2 · 2H2O
RruffiteCa2Cu(AsO4)2 · 2H2O
Unnamed (Fe2+-analogue of Brandtite)Ca2Fe2+(AsO4)2 · 2H2O
ZincroseliteCa2Zn(AsO4)2 · 2H2O
Related Minerals - Nickel-Strunz Grouping):
8.CG.05CassidyiteCa2Ni(PO4)2 · 2H2O
8.CG.05CollinsiteCa2Mg(PO4)2 · 2H2O
8.CG.05FairfielditeCa2Mn2+(PO4)2 · 2H2O
8.CG.05GaititeCa2Zn(AsO4)2 · 2H2O
8.CG.05MesseliteCa2Fe2+(PO4)2 · 2H2O
8.CG.05ParabrandtiteCa2Mn2+(AsO4)2 · 2H2O
8.CG.05β-RoseliteCa2Co(AsO4)2 · 2H2O
8.CG.05TalmessiteCa2Mg(AsO4)2 · 2H2O
8.CG.05HilliteCa2Zn(PO4)2 · 2H2O
8.CG.10BrandtiteCa2Mn2+(AsO4)2 · 2H2O
8.CG.10RoseliteCa2Co(AsO4)2 · 2H2O
8.CG.10ZincroseliteCa2Zn(AsO4)2 · 2H2O
8.CG.10RruffiteCa2Cu(AsO4)2 · 2H2O
8.CG.15FerrilotharmeyeriteCaZnFe3+(AsO4)2(OH) · H2O
8.CG.15LotharmeyeriteCaZn2(AsO4)2 · 2H2O
8.CG.15MawbyitePbFe23+(AsO4)2(OH)2
8.CG.15MounanaitePbFe23+(VO4)2(OH)2
8.CG.15ThometzekitePbCu22+(AsO4)2 · 2H2O
8.CG.15TsumcoritePbZn2(AsO4)2 · 2H2O
8.CG.15CobaltlotharmeyeriteCaCo2(AsO4)2 · 2H2O
8.CG.15CabalzariteCaMg2(AsO4)2 · 2H2O
8.CG.15KrettnichitePbMn23+(VO4)2(OH)2
8.CG.15CobalttsumcoritePbCo2(AsO4)2 · 2H2O
8.CG.15NickellotharmeyeriteCaNi2(AsO4)2 · 2H2O
8.CG.15ManganlotharmeyeriteCaMn23+(AsO4)2(OH)2
8.CG.15SchneebergiteBiCo2(AsO4)2(OH) · H2O
8.CG.15NickelschneebergiteBiNi2(AsO4)2(OH) · H2O
8.CG.20GartrellitePbCuFe3+(AsO4)2(OH) · H2O
8.CG.20HelmutwinkleritePbZn2(AsO4)2 · 2H2O
8.CG.20ZincgartrellitePbZn2(AsO4)2(H2O,OH)2
8.CG.20RappolditePbCo2(AsO4)2 · 2H2O
8.CG.20PhosphogartrellitePbCuFe3+(PO4)2(OH,H2O)2
8.CG.20LukrahniteCa(Cu,Zn)(Fe3+,Zn)(AsO4)2(OH,H2O)2
8.CG.25Pottsite(Pb3Bi)Bi(VO4)4 · H2O
8.CG.35NickeltalmessiteCa2Ni(AsO4)2 · 2H2O
Related Minerals - Hey's Index Grouping:
20.10.1ErythriteCo3(AsO4)2 · 8H2O
20.10.2CobaltaustiniteCaCoAsO4(OH)
20.10.3RoseliteCa2Co(AsO4)2 · 2H2O
20.10.4β-RoseliteCa2Co(AsO4)2 · 2H2O
20.10.6CobaltkoritnigiteCo(AsO3OH) · H2O
20.10.7AerugiteNi8.5(AsO4)2As5+O8
20.10.8XanthiositeNi3(AsO4)2
20.10.9AnnabergiteNi3(AsO4)2 · 8H2O
20.10.10SmolyaninoviteCo3Fe23+(AsO4)4 · 11H2O
20.10.11NickelaustiniteCaNiAsO4(OH)

Other Names for Wendwilsonite

Synonyms:

IMA1985-047

Name in Other Languages:

Other Information

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Wendwilsonite

Reference List:
Dunn, P. J., Sturman, B. D., Nelen, J. A. (1987): Wendwilsonite, the magnesium analogue of roselite, from Morocco, New Jersey, and Mexico, and new data on roselite. American Mineralogist, 72, 217-221.

Weiss, S., Lengauer, C.L., Parodi, G.C. (2002): Roselith, Wendwilsonit und kobalthaltiger Talmessit aus Bou Azzer, Marokko. Lapis 27 (1), 37-41; 58. (in German)

Kolitsch, U. & Fleck, M. (2006): Third update on compounds with kröhnkite-type chains: the crystal structure of wendwilsonite [Ca2Mg(AsO4)2·2H2O] and the new triclinic structure types of AgSc(CrO4)2·2H2O and M2Cu(Cr2O7)2·2H2O (M = Rb, Cs). European Journal of Mineralogy, 18, 471-482.

Internet Links for Wendwilsonite

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    Localities for Wendwilsonite

    This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
    (TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Azerbaijan
     
    • Daşkəsən District (Daskasan; Dashkyasan)
      • Dashkesan
    		Pekov, I. V., Vinogradova, R. A., Chukanov, N. V., & Kulikova, I. M. (2001). On magnesian and cobalt arsenates of the fairfieldite and roselite groups. Zapiski Vseross. Mineral. Obshch.(Proc. Russ. Miner. Soc.), 130(4), 10-23.
    Chile
     
    • Atacama Region
      • Copiapó Province
        • Tierra Amarilla
          • Pampa Larga district
    		samples analysed by Gerhard Mohn and Joy Desor
    • Tarapacá Region
      • El Tamarugal Province
        • Salar Grande
    		samples analysed by Anthony Kampf, Curator Emeritus of Mineral Sciences at NHM of LAC, California
    Germany
     
    • Saxony
      • Erzgebirge
    		J. Gröbner und U. Kolitsch (2005), Lapis 30 (7-8), 71-73; 81-82; Kolitsch & Fleck (2006), European Journal of Mineralogy, 18, 471-482.
    Morocco (TL)
     
    • Drâa-Tafilalet Region
      • Ouarzazate Province
        • Tazenakht
    		Dunn, P.J., et al (1987) American Mineralogist:72: 217-221.
            • Aghbar
    Favreau, G. and Dietrich, J. E. (2006). Die Mineralien von Bou Azzer. Lapis 31(7/8), 27-68; Meisser, N.; Brugger, J.; Krivovichev, S.; Armbruster, T.; Favreau, G. (2012): Description and crystal structure of maghrebite, MgAl2(AsO4)2(OH)2•8H2O, from Aghbar, Anti-Atlas, Morocco: first arsenate in the laueite mineral group. European Journal of Mineralogy 24, 717-726.
            • Bou Azer
    		Favreau, G. and Dietrich, J. E. (2006). Die Mineralien von Bou Azzer. Lapis 31(7/8), 27-68
    USA (TL)
     
    • New Jersey
      • Sussex Co.
        • Franklin Mining District
          • Ogdensburg
            • Sterling Hill
    		Dunn, P.J., et al: Am.Min.:72:217-221 (1987); Dunn(1995):Pt5:685.
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