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Despujolsite

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Formula:
Ca3Mn4+(SO4)2(OH)6 · 3H2O
Colour:
pale yellow to deep yellow-green
Lustre:
Vitreous
Hardness:
Specific Gravity:
2.46
Crystal System:
Hexagonal
Name:
In honour of Pierre Despujols (1888–1981), founder of the Moroccan Geologic Survey.
Hide all sections | Show all sections

Classification of DespujolsiteHide

Approved
Approval Year:
1968
7.DF.25

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
D : Sulfates (selenates, etc.) with additional anions, with H2O
F : With large and medium-sized cations
31.7.6.1

31 : HYDRATED SULFATES CONTAINING HYDROXYL OR HALOGEN
7 : (AB)2(XO4)Zq·xH2O
25.9.6

25 : Sulphates
9 : Sulphates of Mn

Physical Properties of DespujolsiteHide

Vitreous
Transparency:
Transparent
Colour:
pale yellow to deep yellow-green
Hardness:
2½ on Mohs scale
Tenacity:
Brittle
Fracture:
Conchoidal
Density:
2.46(2) g/cm3 (Measured)    2.52(2) g/cm3 (Calculated)

Optical Data of DespujolsiteHide

Type:
Uniaxial (+)
RI values:
nω = 1.656() nε = 1.682(2)
Max Birefringence:
δ = 0.026
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Pleochroism:
Weak
Comments:
O slightly paler yellow than E

Chemical Properties of DespujolsiteHide

Formula:
Ca3Mn4+(SO4)2(OH)6 · 3H2O

Crystallography of DespujolsiteHide

Crystal System:
Hexagonal
Class (H-M):
6 m2 - Ditrigonal Dipyramidal
Space Group:
P62c
Cell Parameters:
a = 8.5405(5) Å, c = 10.8094(9) Å
Ratio:
a:c = 1 : 1.266
Unit Cell V:
682.81 ų
Z:
2

Type Occurrence of DespujolsiteHide

General Appearance of Type Material:
Hexagonal prisms with {10_10} dominant, modified by {10_12} and {0001}.
Geological Setting of Type Material:
Hydrothermal mineral ion metamorphosed manganese deposits

Synonyms of DespujolsiteHide

Other Language Names for DespujolsiteHide

Relationship of Despujolsite to other SpeciesHide

Other Members of this group:
FleischeritePb3Ge(SO4)2(OH)6 · 3H2OHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
GenplesiteCa3Sn(SO4)2(OH)6·3H2OHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
MallestigitePb3Sb5+(SO4)(AsO4)(OH)6 · 3H2OHex. 6 : P63
SchaurteiteCa3Ge(SO4)2(OH)6 · 4H2OHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
Unnamed (Ba-Sb Silicate-Sulphate-Hydroxide-Hydrate)Ba3Sb5+[(Si,S)O3(OH)]2(OH,O)6 · 3H2O Trig. 3 : P3

Related Minerals - Nickel-Strunz GroupingHide

7.DF.05UklonskoviteNaMg(SO4)F · 2H2OMon.
7.DF.10KainiteKMg(SO4)Cl · 3H2OMon. 2/m : B2/m
7.DF.15NatrochalciteNaCu2(SO4)2(OH) · 2H2OMon. 2/m : B2/m
7.DF.20MetasideronatriteNa2Fe(SO4)2(OH) · H2OOrth. mmm (2/m 2/m 2/m)
7.DF.20SideronatriteNa2Fe(SO4)2(OH) · 3H2OOrth. 2 2 2 : P21 21 21
7.DF.25FleischeritePb3Ge(SO4)2(OH)6 · 3H2OHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
7.DF.25SchaurteiteCa3Ge(SO4)2(OH)6 · 4H2OHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
7.DF.25MallestigitePb3Sb5+(SO4)(AsO4)(OH)6 · 3H2OHex. 6 : P63
7.DF.30Slavíkite(H3O+)3Mg6Fe15(SO4)21(OH)18 · 98H2OTrig. 3 : R3
7.DF.35MetavoltineNa6K2FeFe6(SO4)12O2 · 18H2OTrig.
7.DF.40LannoniteMg2Ca4Al4(SO4)8F8 · 24H2O Tet. 4/m : I4/m
7.DF.40VlodavetsiteAlCa2(SO4)2F2Cl · 4H2OTet. 4/m : I4/m
7.DF.45PeretaiteCa(SbO)4(SO4)2(OH)2 · 2H2OMon. 2/m : B2/b
7.DF.50GordaiteNaZn4(SO4)(OH)6Cl · 6H2OTrig. 3 : P3
7.DF.55Clairite(NH4)2Fe3(SO4)4(OH)3 · 3H2OTric.
7.DF.60ArzruniteCu4Pb2(SO4)(OH)4Cl6 · 2H2O (?)Orth.
7.DF.65ElyitePb4Cu(SO4)O2(OH)4 · H2OMon. 2/m
7.DF.70YecoraiteFe3+3Bi5(Te6+O4)2(Te4+O3)O9 · 9H2O
7.DF.75RiomarinaiteBi(SO4)(OH) · H2OMon. 2/m
7.DF.80DukeiteBi3+24Cr6+8O57(OH)6 · 3H2OTrig. 3m : P3 1c
7.DF.85XocolatliteCa2Mn4+2(Te6+O6)2 · H2OMon. 2/m : P2/m

Related Minerals - Dana Grouping (8th Ed.)Hide

31.7.6.2SchaurteiteCa3Ge(SO4)2(OH)6 · 4H2OHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
31.7.6.3FleischeritePb3Ge(SO4)2(OH)6 · 3H2OHex. 6/mmm (6/m 2/m 2/m) : P63/mmc

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

25.9.1SzmikiteMnSO4 · H2OMon.
25.9.2JôkokuiteMnSO4 · 5H2OTric.
25.9.3MallarditeMnSO4 · 7H2OMon. 2/m : P2/m
25.9.4ManganolangbeiniteK2Mn2(SO4)3Iso. 2 3 : P21 3
25.9.5Chvaleticeite(Mn,Mg)SO4 · 6H2OMon. 2/m : B2/b
25.9.7ApjohniteMn2+Al2(SO4)4 · 22H2OMon.
25.9.8ShigaiteMn6Al3(OH)18[Na(H2O)6][SO4]2 · 6H2OTrig.
25.9.9Ilesite(Mn,Zn,Fe)SO4 · 4H2OMon. 2/m
25.9.10MooreiteMg92Mn2Zn4(SO4)2(OH)26 · 8H2OMon. 2/m : P2/b
25.9.11Torreyite(Mg,Mn2+)72Mn2+2Zn4(SO4)2(OH)22 · 8H2OMon. 2/m : P21/b
25.9.12Lawsonbauerite(Mn2+,Mg)9Zn4(SO4)2(OH)22 · 8H2OMon. 2/m : P21/b
25.9.13Dietrichite(Zn,Fe2+,Mn2+)Al2(SO4)4 · 22H2OMon. 2/m : P21/b

Other InformationHide

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 DespujolsiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Gaudefroy, C., Granger, M. M., Permingeat, F., & Protas, J. (1968). La despujolsite, une nouvelle espèce minérale. Bull. Soc. Fr. Minéral. Cristallogr, 91, 43-50.
abstract American Mineralogist: 54: 326.
Gaudefroy C, Granger M M, Permingeat F, Protas J (1968) La despujolsite, une nouvelle espèce minérale. Bulletin de la Société Française de Minéralogie et de Cristallographie 91, 43-50
Hawthorne F C (1994) Structural aspects of oxide and oxysalt crystals. Acta Crystallographica B50, 481-510
Barkley, M. C., Yang, H., Evans, S. H., Downs, R. T. and Origlieri, M. J. (2011): Redetermination of despujolsite, Ca3Mn4+(SO4)2(OH)6•3H2O. Acta Crystallogr. E67, i47-i48.

Internet Links for DespujolsiteHide

Localities for DespujolsiteHide

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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Australia
 
  • New South Wales
    • Argyle Co.
Vera Munro-Smith (2006) Cobalt Mineralisation in Selected Australian Deposits. PhD thesis, University of Western Sydney.
Bolivia
 
  • Potosí Department
    • Tomás Frías Province
Econ Geol (1997) 92:623-632; Dill, H.G. (1998): Mineralium Deposita 33, 359-378.
Bulgaria
 
  • Balkan Mts (Stara Planina)
Onac, B. P., & Forti, P. (2011). State of the art and challenges in cave minerals studies. Studia UBB Geologia, 56(1), 33-42.
Japan
 
  • Honshu Island
    • Chubu Region
      • Ishikawa Prefecture
        • Komatsu City
Brandon, K., Tazaki, K., & Okuno, M. (2009). Metal Uptake in Benthic Organisms and Argillaceous Sediments Affected by Mine Drainage in Ogoya, Ishikawa, Japan. Clay Science, 14(2), 65-79.
Morocco (TL)
 
  • Drâa-Tafilalet Region
    • Ouarzazate Province
Bull.Soc.fr.Min.Crist.(1968) 91, 43-50
Nicaragua
 
  • León Department
    • Telica Volcano
Hynek, B. M., McCollom, T. M., Marcucci, E. C., Brugman, K. K., & Rogers, K. L. (2013, March). Assessing environmental controls on acid-sulfate alteration at active volcanoes in Nicaragua: applications to relic hydrothermal systems on mars. In 44th Lunar and Planetary Science Conference, March (pp. 18-22).; Hynek, B. M., McCollom, T. M., Marcucci, E. C., Brugman, K., & Rogers, K. L. (2013). Assessment of environmental controls on acid‐sulfate alteration at active volcanoes in Nicaragua: Applications to relic hydrothermal systems on Mars. Journal of Geophysical Research: Planets, 118(10), 2083-2104.
South Africa
 
  • Northern Cape Province
    • Kalahari manganese field
      • Kuruman
        • N'Chwaning Mines
Cairncross photo ID 729306
Barkley M C, Yang H, Evans S H, Downs R T, Origlieri M J (2011) Redetermination of despujolsite, Ca3Mn4+(SO4)2(OH)6·3H2O. Acta Crystallographica E67, i47-i48; Cairncross, B., and Beukes, N. J., (2013) The Kalahari Manganese Field, the adventure continues ... Struik Nature Publishers, Cape Town, South Africa
USA
 
  • New Mexico
    • Socorro Co.
      • Ojo Caliente No. 2 District
NMBGMR Open-file Report - 535
Mineral and/or Locality  
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