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Pharmacoalumite

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Formula:
KAl4(AsO4)3(OH)4 · 6.5H2O
Colour:
White, pale yellow
Lustre:
Sub-Vitreous, Waxy, Dull
Hardness:
Specific Gravity:
2.676 (Calculated)
Crystal System:
Isometric
Name:
Originally named 'Alumopharmacosiderite' in 1981 by Karl Schmetzer, Wolfgang Horn, and Hermann Bank in allusion to its composition, containing ALUMinium, and its relationship to Pharmacosiderite.

Renamed to Pharmacoalumite by Rumsey et al. 2010.
Pharmacoalumite Group. The Al analogue of pharmacosiderite. Chemically similar to filatovite and wrightite.

The type material was found on a museum specimen associated with other oxidized arsenates.


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Classification of PharmacoalumiteHide

Approved
Approval Year:
1980
8.DK.12

8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
K : With large and medium-sized cations, (OH, etc.):RO4 > 1:1 and < 2:1
42.8.1b.1

42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
8 : (AB)5(XO4)3Zq·xH2O
20.4.3

20 : Arsenates (also arsenates with phosphate, but without other anions)
4 : Arsenates of Group III metals (Al, rare earths)

Physical Properties of PharmacoalumiteHide

Sub-Vitreous, Waxy, Dull
Transparency:
Transparent, Translucent
Colour:
White, pale yellow
Streak:
White
Hardness:
2½ on Mohs scale
Comment:
By analogy with pharmacosiderite
Tenacity:
Brittle
Density:
2.676 g/cm3 (Calculated)

Optical Data of PharmacoalumiteHide

Type:
Isotropic
RI values:
n = 1.565
Max Birefringence:
δ = 0.000 - Isotropic minerals have no birefringence
Surface Relief:
Low
Pleochroism:
Non-pleochroic

Chemical Properties of PharmacoalumiteHide

Formula:
KAl4(AsO4)3(OH)4 · 6.5H2O

Crystallography of PharmacoalumiteHide

Crystal System:
Isometric
Class (H-M):
4 3m - Hextetrahedral
Space Group:
P4 3m
Setting:
P4 3m
Cell Parameters:
a = 7.745 Å
Unit Cell V:
464.58 ų (Calculated from Unit Cell)
Z:
1
Morphology:
As fine-grained polycrystalline aggregates. Often in cubic crystals.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
7.77 (100)
2.739 (60)
4.48 (50)
3.16 (50)
3.87 (40)
2.335 (40)
2.452 (30)
Comments:
Values obtained on natural material from El Guanaco, Chile.

Type Occurrence of PharmacoalumiteHide

Place of Conservation of Type Material:
U.S. National Museum of Natural History, Washington, D.C., USA: #149527.
Geological Setting of Type Material:
With other oxidized arsenates in a polymetallic deposit.
Associated Minerals at Type Locality:

Synonyms of PharmacoalumiteHide

Other Language Names for PharmacoalumiteHide

Relationship of Pharmacoalumite to other SpeciesHide

Other Members of this group:
BariopharmacoalumiteBa0.5Al4(AsO4)3(OH)4 · 4H2OIso. 4 3m : P4 3m
Hydroniumpharmacoalumite(H3O)Al4(AsO4)3(OH)4·4.5H2OIso. 4 3m : P4 3m
NatropharmacoalumiteNaAl4(AsO4)3(OH)4 · 4H2OIso. 4 3m : P4 3m

Common AssociatesHide

Associated Minerals Based on Photo Data:
Olivenite4 photos of Pharmacoalumite associated with Olivenite on mindat.org.
Mansfieldite2 photos of Pharmacoalumite associated with Mansfieldite on mindat.org.
Ceruleite2 photos of Pharmacoalumite associated with Ceruleite on mindat.org.
Parnauite2 photos of Pharmacoalumite associated with Parnauite on mindat.org.
Conichalcite2 photos of Pharmacoalumite associated with Conichalcite on mindat.org.
Cyanotrichite1 photo of Pharmacoalumite associated with Cyanotrichite on mindat.org.
Maghrebite1 photo of Pharmacoalumite associated with Maghrebite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

8.DK.RichelsdorfiteCa2Cu5Sb(AsO4)4(OH)6Cl · 6H2OMon. 2/m
8.DK.10BariopharmacosideriteBa0.5Fe3+4(AsO4)3(OH)4 · 5H2OTet. 4 2m : P4 2m
8.DK.10PharmacosideriteKFe3+4(AsO4)3(OH)4 · 6-7H2OIso. 4 3m : P4 3m
8.DK.10Natropharmacosiderite(Na,K)Fe3+4(AsO4)3(OH)4 · 6-7H2OIso. 4 3m : P4 3m
8.DK.10Hydroniumpharmacosiderite(H3O)Fe4(AsO4)3(OH)4 · 4H2OIso. 4 3m : P4 3m
8.DK.12NatropharmacoalumiteNaAl4(AsO4)3(OH)4 · 4H2OIso. 4 3m : P4 3m
8.DK.12BariopharmacoalumiteBa0.5Al4(AsO4)3(OH)4 · 4H2OIso. 4 3m : P4 3m
8.DK.15BurangaiteNaFe2+Al5(PO4)4(OH)6 · 2H2OMon. 2/m : B2/b
8.DK.15DufréniteCa0.5Fe2+Fe3+5(PO4)4(OH)6 · 2H2OMon. 2/m : B2/b
8.DK.15NatrodufréniteNaFe2+Fe3+5(PO4)4(OH)6 · 2H2OMon.
8.DK.15MatioliiteNaMgAl5(PO4)4(OH)6 · 2H2OMon. 2/m : B2/b
8.DK.15GayiteNaMn2+Fe3+5(PO4)4(OH)6 · 2H2OMon. 2/m : B2/b
8.DK.20KidwelliteNaFe3+9+x(PO4)6(OH)11 · 3H2O, x = 0.33Mon. 2/m : P2/b
8.DK.25Bleasdaleite(Ca,Fe3+)2Cu5(Bi,Cu)(PO4)4(H2O,OH,Cl)13Mon.
8.DK.30Matulaite(Fe3+,Al)Al7(PO4)4(PO3OH)2(OH)8(H2O)8 · 8H2OMon.
8.DK.35KrasnoviteBa(Al,Mg)(PO4,CO3)(OH)2 · H2OOrth.

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

42.8.1b.2Barium-AlumopharmacosideriteBa0.5Al4(AsO4)3(OH)4 · 4H2O
42.8.1b.2NatropharmacoalumiteNaAl4(AsO4)3(OH)4 · 4H2OIso. 4 3m : P4 3m
42.8.1b.3Barium-zinc-alumopharmacosideriteBa0.5Al4(AsO4)3(OH)4 · 4H2OTet.
42.8.1b.3BariopharmacoalumiteBa0.5Al4(AsO4)3(OH)4 · 4H2OIso. 4 3m : P4 3m

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

20.4.1MansfielditeAlAsO4 · 2H2OOrth. mmm (2/m 2/m 2/m) : Pbca
20.4.2BulachiteAl2(AsO4)(OH)3 · 3H2OOrth.
20.4.4LuetheiteCu2Al2(AsO4)2(OH)4Mon. 2/m : P21/m
20.4.5ArsenogoyaziteSrAl3(AsO4)(AsO3OH)(OH)6Trig. 3m (3 2/m) : R3m
20.4.6ArsenocrandalliteCaAl3(AsO4)(AsO3OH)(OH)6Trig. 3m (3 2/m)
20.4.7Arsenoflorencite-(Ce)CeAl3(AsO4)2(OH)6Trig. 3m (3 2/m) : R3m
20.4.8Arsenoflorencite-(La)LaAl3(AsO4)2(OH)6Trig. 3m (3 2/m) : R3m
20.4.9Arsenoflorencite-(Nd)NdAl3(AsO4)2(OH)6Trig.
20.4.10Gerdtremmelite(Zn,Fe)(Al,Fe)2(AsO4)(OH)5Tric.
20.4.11Gasparite-(Ce)Ce(AsO4)
20.4.12Chernovite-(Y)Y(AsO4)Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
20.4.13Agardite-(Y)YCu6(AsO4)3(OH)6 · 3H2OHex. 6/m : P63/m
20.4.14Agardite-(La)LaCu6(AsO4)3(OH)6 · 3H2OHex. 6/m
20.4.15GoudeyiteAlCu6(AsO4)3(OH)6 · 3H2OHex.
20.4.16Retzian-(Ce)Mn2+2Ce(AsO4)(OH)4Orth. mmm (2/m 2/m 2/m) : Pban
20.4.17Retzian-(La)(Mn2+,Mg)2(La,Ce,Nd)(AsO4)(OH)4Orth. mmm (2/m 2/m 2/m) : Pban
20.4.18Retzian-(Nd)Mn2+2(Nd,Ce,La)(AsO4)(OH)4Orth. mmm (2/m 2/m 2/m) : Pban

Fluorescence of PharmacoalumiteHide

Not fluorescent.

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 PharmacoalumiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Schmetzer, K., Horn, W., Bank, H. (1981) Alumopharmacosiderite, KAl4[(OH)4|(AsO4)3].6.5 H2O, a new mineral. Neues Jahrbuch für Mineralogie, Monatshefte: 1981: 97-102. [in German]
Cabri L J, Fleischer M, Pabst A (1981) New mineral names. American Mineralogist: 66: 1099-1103.
Rumsey, M.S., Mills, S.J., Spratt, J. (2010) Natropharmacoalumite, NaAl4[(OH)4(AsO4)3].4H2O, a new mineral of the pharmacosiderite supergroup and the renaming of aluminopharmacosiderite to pharmacoalumite. Mineralogical Magazine: 74: 929-936.
Williams, P.A., Hatert, F., Pasero, M., Mills, S. (2010) IMA Commission on new minerals, nomenclature and classification (CNMNC) Newsletter 2. New minerals and nomenclature modifications approved in 2010. Mineralogical Magazine: 74: 375-377.

Internet Links for PharmacoalumiteHide

Localities for PharmacoalumiteHide

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 (TL)
 
  • Antofagasta Region
    • Antofagasta Province
      • Santa Catalina
Neues Jahrb.,Mh.(1981) 97-102
No reference listed
  • Atacama Region
    • Copiapó Province
      • Tierra Amarilla
        • Pampa Larga district
Kampf, A. R., Mills, S. J., Housley, R. M., Rossman, G. R., Nash, B. P., Dini, M., & Jenkins, R. A. (2013). Joteite, Ca2CuAl [AsO4][AsO3 (OH)] 2 (OH) 2· 5H2O, a new arsenate with a sheet structure and unconnected acid arsenate groups. Mineralogical Magazine, 77(6), 2811-2823.
Jesse Crawford collection (mindat foto); Yang, H., Jenkins, R.A., Downs, R.T., Evans, S.H., Tait, K.T. (2011): Rruffite, Ca2Cu(AsO4)2·2H2O,a new member of the roselite group, from Tierra Amarilla, Chile. Canadian Mineralogist, 49, 877-884
France
 
  • Grand Est
    • Bas-Rhin
      • Villé Valley
Wittern, Journée: "Mineralien finden in den Vogesen", von Loga (Cologne), 1997
  • Provence-Alpes-Côte d'Azur
    • Var
      • Le Pradet
No reference listed
Germany
 
  • Saxony
    • Erzgebirge
      • Schneeberg District
Lapis 30(7/8):67-68 (2005)
Greece
 
  • Attikí Prefecture (Attica; Attika)
    • Lavrion District (Laurion; Laurium)
      • Lavrion District Mines
        • Agios Konstantinos [St Constantine] (Kamariza)
Möckel, S. (2000): Strashimirit und 11 weitere Neubestimmungen aus Lavrion (GR). Lapis 25 (7-8), 74.
Morocco
 
  • Drâa-Tafilalet Region
    • Ouarzazate Province
      • Tazenakht
        • Bou Azzer District (Bou Azer District)
          • Aghbar
Favreau, G. and Dietrich, J. E. (2006). Die Mineralien von Bou Azzer. Lapis 31(7/8), 27-68; Favreau, G., Dietrich, J. E., Meisser, N., Brugger, J., Ait Haddouch, L. & Maacha, L. (2007): Bou Azzer, Morocco. Mineralogical Record 38, 345-407
          • Bou Azer
N. Meisser, J. Brugger (2006): "Bouazzerit und Maghrebit, zwei neue Arsenatmineralien aus dem Revier Bou Azzer, Marokko", Lapis 31(7/8), 69-71; Favreau, G., Dietrich, J. E., Meisser, N., Brugger, J., Ait Haddouch, L. & Maacha, L. (2007): Bou Azzer, Morocco. Mineralogical Record 38, 345-407
          • Oumlil
Favreau, G. and Dietrich, J. E. (2006). Die Mineralien von Bou Azzer. Lapis 31(7/8), 27-68; Favreau, G., Dietrich, J. E., Meisser, N., Brugger, J., Ait Haddouch, L. & Maacha, L. (2007): Bou Azzer, Morocco. Mineralogical Record 38, 345-407
          • Tamdrost
Favreau, G., Dietrich, J. E., Meisser, N., Brugger, J., Ait Haddouch, L. & Maacha, L. (2007): Bou Azzer, Morocco. Mineralogical Record 38, 345-407
Favreau, G. and Dietrich, J. E. (2006). Die Mineralien von Bou Azzer. Lapis 31(7/8), 27-68
Spain
 
  • Andalusia
    • Almería
      • Cuevas del Almanzora (Cuevas de Vera)
        • Sierra Almagrera
          • Jaroso Ravine
Calvo, M. (2015). Minerales y Minas de España. Vol VII. Fosfatos, Arseniatos y Vanadatos. Escuela Técnica Superior de Ingenieros de Minas de Madrid. Fundación Gómez Pardo. 479 págs.
      • Níjar
        • Rodalquilar
PXRD-confirmed 9.2009 C. Rewitzer collection
UK
 
  • England
    • Cornwall
      • Mount's Bay District
        • St Hilary
Grey, I.E., Kampf, A.R., Price, J.R. and Macrae, C.M. (2015): Bettertonite, [Al6(AsO4)3(OH)9(H2O)5]·11H2O, a new mineral from the Penberthy Croft mine, St. Hilary, Cornwall, UK, with a structure based on polyoxometalate clusters. Mineralogical Magazine 49, 1849-1858.
USA
 
  • California
    • Sierra Co.
      • Loyalton
Mineralogical Record 24: 381
  • Utah
    • Tooele Co.
      • Deep Creek Mts
Rick Dalrymple Collection
          • Gold Hill
Luigi Chiappino specimen
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