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Walthierite

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Formula:
Ba0.5Al3(SO4)2(OH)6
Colour:
White, light yellow
Lustre:
Waxy, Earthy
Hardness:
3 - 4
Specific Gravity:
3.02 (Calculated)
Crystal System:
Trigonal
Name:
Named after Thomas Nash Walthier (1922/23) - 1990), geologist who played a significant role in the exploration of the El Indio and Tambo mining districts, Coquimbo region (Chile).

Not to be confused with waltherite (now walpurgite).
This page provides mineralogical data about Walthierite.


Hide all sections | Show all sections

Classification of WalthieriteHide

Approved
Approval Year:
1991
First Published:
1992
7.BC.10

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
B : Sulfates (selenates, etc.) with additional anions, without H2O
C : With medium-sized and large cations
30.2.4.7

30 : ANHYDROUS SULFATES CONTAINING HYDROXYL OR HALOGEN
2 : (AB)2(XO4)Zq

Physical Properties of WalthieriteHide

Waxy, Earthy
Transparency:
Transparent
Colour:
White, light yellow
Hardness:
3 - 4 on Mohs scale
Density:
3.02 g/cm3 (Calculated)

Optical Data of WalthieriteHide

Type:
Uniaxial (+)
RI values:
nω = 1.588 nε = 1.604
Max Birefringence:
δ = 0.016
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate

Chemical Properties of WalthieriteHide

Formula:
Ba0.5Al3(SO4)2(OH)6
IMA Formula:
Ba0.5Al3(SO4)2(OH)6

Crystallography of WalthieriteHide

Crystal System:
Trigonal

Type Occurrence of WalthieriteHide

Place of Conservation of Type Material:
National Museum of Natural History, Washington, D.C., USA, 170208, 170209.
Associated Minerals at Type Locality:

Synonyms of WalthieriteHide

Other Language Names for WalthieriteHide

German:Walthierit
Spanish:Walthierita

Relationship of Walthierite to other SpeciesHide

Other Members of this group:
AluniteKAl3(SO4)2(OH)6Trig. 3m : R3m
Ammonioalunite(NH4)Al3(SO4)2(OH)6Trig.
Ammoniojarosite(NH4)Fe3+3(SO4)2(OH)6Trig. 3m : R3m
ArgentojarositeAgFe3+3(SO4)2(OH)6Trig. 3m : R3m
Beaverite-(Cu)Pb(Fe3+2Cu)(SO4)2(OH)6Trig. 3m (3 2/m) : R3m
Beaverite-(Zn)Pb(Fe3+2Zn)(SO4)2(OH)6Trig. 3m (3 2/m) : R3m
DorallchariteTlFe3+3(SO4)2(OH)6Trig. 3m (3 2/m) : R3m
HuangiteCa0.5Al3(SO4)2(OH)6Trig.
Hydroniumjarosite(H3O)Fe3+3(SO4)2(OH)6Trig. 3m (3 2/m) : R3m
JarositeKFe3+ 3(SO4)2(OH)6Trig. 3m (3 2/m) : R3m
NatroaluniteNaAl3(SO4)2(OH)6Trig. 3m : R3m
Natroalunite-2c(Na,Ca0.5,K)Al3(SO4)2(OH)6Trig. 3m (3 2/m) : R3m
NatrojarositeNaFe3(SO4)2(OH)6Trig. 3m : R3m
OsarizawaitePb(Al2Cu2+)(SO4)2(OH)6Trig. 3m (3 2/m) : R3m
PlumbojarositePb0.5Fe3+3(SO4)2(OH)6Trig. 3m (3 2/m) : R3m
Schlossmacherite(H3O)Al3(SO4)2(OH)6Trig.

Related Minerals - Nickel-Strunz GroupingHide

7.BC.Adranosite-(Fe)(NH4)4NaFe3+2(SO4)4Cl(OH)2Tet. 4/mmm (4/m 2/m 2/m) : I41/acd
7.BC.Adranosite(NH4)4NaAl2(SO4)4Cl(OH)2Tet. 4/mmm (4/m 2/m 2/m) : I41/acd
7.BC.05D'AnsiteNa21Mg(SO4)10Cl3Iso.
7.BC.10AluniteKAl3(SO4)2(OH)6Trig. 3m : R3m
7.BC.10Ammonioalunite(NH4)Al3(SO4)2(OH)6Trig.
7.BC.10Ammoniojarosite(NH4)Fe3+3(SO4)2(OH)6Trig. 3m : R3m
7.BC.10ArgentojarositeAgFe3+3(SO4)2(OH)6Trig. 3m : R3m
7.BC.10Beaverite-(Cu)Pb(Fe3+2Cu)(SO4)2(OH)6Trig. 3m (3 2/m) : R3m
7.BC.10DorallchariteTlFe3+3(SO4)2(OH)6Trig. 3m (3 2/m) : R3m
7.BC.10HuangiteCa0.5Al3(SO4)2(OH)6Trig.
7.BC.10Hydroniumjarosite(H3O)Fe3+3(SO4)2(OH)6Trig. 3m (3 2/m) : R3m
7.BC.10JarositeKFe3+ 3(SO4)2(OH)6Trig. 3m (3 2/m) : R3m
7.BC.10Natroalunite-2c(Na,Ca0.5,K)Al3(SO4)2(OH)6Trig. 3m (3 2/m) : R3m
7.BC.10NatroaluniteNaAl3(SO4)2(OH)6Trig. 3m : R3m
7.BC.10NatrojarositeNaFe3(SO4)2(OH)6Trig. 3m : R3m
7.BC.10OsarizawaitePb(Al2Cu2+)(SO4)2(OH)6Trig. 3m (3 2/m) : R3m
7.BC.10PlumbojarositePb0.5Fe3+3(SO4)2(OH)6Trig. 3m (3 2/m) : R3m
7.BC.10Schlossmacherite(H3O)Al3(SO4)2(OH)6Trig.
7.BC.10Beaverite-(Zn)Pb(Fe3+2Zn)(SO4)2(OH)6Trig. 3m (3 2/m) : R3m
7.BC.15Ye'elimiteCa4Al6(SO4)O12Iso.
7.BC.20AtlasoviteK(BiO)Cu6Fe3+(SO4)5O3ClTet. 4/mmm (4/m 2/m 2/m) : P4/ncc
7.BC.20NabokoiteKCu7(SO4)5(Te4+O3)OClTet.
7.BC.25ChlorothioniteK2Cu(SO4)Cl2Orth. mmm (2/m 2/m 2/m) : Pnma
7.BC.30EuchlorineKNaCu3(SO4)3OMon.
7.BC.30FedotoviteK2Cu3(SO4)3OMon. 2/m : B2/b
7.BC.35KamchatkiteKCu3(SO4)2OClOrth. mmm (2/m 2/m 2/m) : Pnma
7.BC.40PiypiteK4Cu4O2(SO4)4 · (Na,Cu)ClTet.
7.BC.45KlyuchevskiteK3Cu3(Fe3+,Al)(SO4)4O2Mon.
7.BC.45AlumoklyuchevskiteK3Cu3(Al,Fe3+)(SO4)4O2Tric. 1 : P1
7.BC.50CaledonitePb5Cu2(SO4)3(CO3)(OH)6Orth. mm2 : Pmn21
7.BC.55WherryitePb7Cu2(SO4)4(SiO4)2(OH)2Mon. 2/m : B2/m
7.BC.60MammothitePb6Cu4AlSb5+O2(OH)16Cl4(SO4)2Mon. 2 : B2
7.BC.65LinaritePbCu(SO4)(OH)2Mon. 2/m : P21/m
7.BC.65SchmiederitePb2Cu2(Se6+O4)(Se4+O3)(OH)4Mon.
7.BC.65MunakataitePb2Cu2(Se4+O3)(SO4)(OH)4Mon. 2/m : P21/m
7.BC.70ChenitePb4Cu(SO4)2(OH)6Tric. 1 : P1
7.BC.75KrivovichevitePb3Al(OH)6(SO4)(OH)Trig. 3m : R3c
7.BC.80AnhydrokainiteKMg(SO4)Cl

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

30.2.4.1AluniteKAl3(SO4)2(OH)6Trig. 3m : R3m
30.2.4.3Schlossmacherite(H3O)Al3(SO4)2(OH)6Trig.
30.2.4.4OsarizawaitePb(Al2Cu2+)(SO4)2(OH)6Trig. 3m (3 2/m) : R3m
30.2.4.5Natroalunite-2c(Na,Ca0.5,K)Al3(SO4)2(OH)6Trig. 3m (3 2/m) : R3m
30.2.4.6Ammonioalunite(NH4)Al3(SO4)2(OH)6Trig.
30.2.4.8HuangiteCa0.5Al3(SO4)2(OH)6Trig.

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 WalthieriteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Li, G., Peacor, D.R., Essene, E.J., Brosnahan, D.R., Beane, R.E. (1992) Walthierite, Ba0.5◻0.5Al3(SO4)2(OH)6, and huangite, Ca0.5◻0.5Al3(SO4)2(OH)6, two new minerals of the alunite group from the Coquimbo region, Chile. American Mineralogist: 77: 1275-1284.
Mandarino, J.A. (1997) New Minerals 1990-1994. Mineralogical Record, Arizona.
Jambor, J.L. (1999) Nomenclature of the alunite supergroup. The Canadian Mineralogist: 37: 1323-1341.
Bayliss, P., Kolitsch, U., Nickel, E.H., Pring, A. (2010) Alunite supergroup: recommended nomenclature. Mineralogical Magazine: 74: 919-927.

Internet Links for WalthieriteHide

Localities for WalthieriteHide

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.
Chile
 
  • Atacama Region
    • Huasco Province
      • Alto del Carmen
Economic Geology; January 2005; v. 100; no. 1; p. 131-148
  • Coquimbo Region
    • Elqui Province
      • El Indio deposit
Deyell, C. L., Rye, R. O., Landis, G. P., & Bissig, T. (2005). Alunite and the role of magmatic fluids in the Tambo high-sulfidation deposit, El Indio–Pascua belt, Chile. Chemical Geology, 215(1), 185-218.
Amer.Min.(1992) 77, 1275-1284
http://www.lrz-muenchen.de/~mineralogische-sammlungen-dmg/analysen/winstanleyit.htm
Italy
 
  • Sardinia
    • Carbonia-Iglesias Province
      • Carbonia
        • Barbusi
Sauro, F., De Waele, J., Onac, B. P., Galli, E., Dublyansky, Y., Baldoni, E., & Sanna, L. (2014). Hypogenic speleogenesis in quartzite: the case of Corona'e Sa Craba Cave (SW Sardinia, Italy). Geomorphology, 211, 77-88.
Mineral and/or Locality  
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