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Bariopharmacoalumite

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About BariopharmacoalumiteHide

Formula:
Ba0.5Al4(AsO4)3(OH)4 · 4H2O
Colour:
Colourless to pale yellow
Lustre:
Adamantine
Hardness:
Specific Gravity:
2.580 (Calculated)
Crystal System:
Isometric
Name:
Named in allusion to its composition, being the BARIum analogue of Pharmacoalumite, where the barium substitutes for potassium.
This page provides mineralogical data about Bariopharmacoalumite.


Classification of BariopharmacoalumiteHide

Approved
Approval Year:
2010
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.3

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

Physical Properties of BariopharmacoalumiteHide

Adamantine
Transparency:
Transparent, Translucent
Colour:
Colourless to pale yellow
Streak:
White
Hardness:
3½ on Mohs scale
Hardness:
VHN100=165.24 - 327.38 - Vickers
Comment:
Mohs hardness was estimated from Vickers data.
Tenacity:
Brittle
Cleavage:
Imperfect/Fair
on {001}
Fracture:
Irregular/Uneven
Density:
2.580 g/cm3 (Calculated)

Optical Data of BariopharmacoalumiteHide

Type:
Isotropic
RI values:
n = 1.573
Birefringence:
Isotropic minerals have no birefringence
Surface Relief:
Low
Comments:
Bariopharmacoalumite shows anomalous extinction, typical of members of the supergroup and deep blue internal reflections probably due to twinning.

Chemical Properties of BariopharmacoalumiteHide

Formula:
Ba0.5Al4(AsO4)3(OH)4 · 4H2O
IMA Formula:
Ba0.5Al4[(AsO4)3(OH)4] · 4H2O

Crystallography of BariopharmacoalumiteHide

Crystal System:
Isometric
Class (H-M):
4 3m - Hextetrahedral
Space Group:
P4 3m
Cell Parameters:
a = 7.742(4) Å
Unit Cell V:
464.2 ų
Z:
1
Morphology:
The only form observed is {001}.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
7.759 (100)
5.485 (27)
4.454 (18)
3.878 (27)
3.456 (14)
3.159 (16)
2.738 (16)
2.582 (10)
2.452 (12)

Type Occurrence of BariopharmacoalumiteHide

General Appearance of Type Material:
Radial growths of colourless to pale yellow interpenetrating cubes up to several millimetres across. Individual cubes are generally <0.1 mm in size and some exhibit stepped growth features. Some cubes are elongated, giving a rectangular outline.
Place of Conservation of Type Material:
Natural History Museum, London, England: BM 2010,82.
Geological Setting of Type Material:
Secondary mineral in a long fracture in conglomerate.
Associated Minerals at Type Locality:

Synonyms of BariopharmacoalumiteHide

Relationship of Bariopharmacoalumite to other SpeciesHide

Other Members of this group:
Hydroniumpharmacoalumite(H3O)Al4(AsO4)3(OH)4·4.5H2OIso. 4 3m : P4 3m
NatropharmacoalumiteNaAl4(AsO4)3(OH)4 · 4H2OIso. 4 3m : P4 3m
PharmacoalumiteKAl4(AsO4)3(OH)4 · 6.5H2OIso. 4 3m : P4 3m

Common AssociatesHide

Associated Minerals Based on Photo Data:
Olivenite3 photos of Bariopharmacoalumite associated with Olivenite on mindat.org.
Mansfieldite2 photos of Bariopharmacoalumite associated with Mansfieldite on mindat.org.
Arsenogorceixite1 photo of Bariopharmacoalumite associated with Arsenogorceixite on mindat.org.
Forêtite1 photo of Bariopharmacoalumite associated with Forêtite on mindat.org.
Parnauite1 photo of Bariopharmacoalumite associated with Parnauite on mindat.org.
Cyanotrichite1 photo of Bariopharmacoalumite associated with Cyanotrichite on mindat.org.
Scorodite1 photo of Bariopharmacoalumite associated with Scorodite 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.12PharmacoalumiteKAl4(AsO4)3(OH)4 · 6.5H2OIso. 4 3m : P4 3m
8.DK.12NatropharmacoalumiteNaAl4(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.1PharmacoalumiteKAl4(AsO4)3(OH)4 · 6.5H2OIso. 4 3m : P4 3m
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.

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 BariopharmacoalumiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Mills, S. J., Rumsey, M. S., Favreau, G., Spratt, J., Raudsepp, M. and Dini M. (2011): Bariopharmacoalumite, a new mineral species from Cap Garonne, France and Mina Grande, Chile. Mineral. Mag. 75, 135-144.

Internet Links for BariopharmacoalumiteHide

Localities for BariopharmacoalumiteHide

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.
Austria
 
  • Carinthia
    • Karawanken
      • Bad Eisenkappel (Bad Eisenkappl)
        • Rijavitzagraben (Jeravitzagraben; Remscheniggraben)
Carinthia II (2017)
Chile
 
  • Coquimbo Region
    • Elqui Province
      • La Serena
        • Arqueros Ag mining district
          • Marqueza
Mills, S. J., Rumsey, M. S., Favreau, G., Spratt, J., Raudsepp, M. and Dini M. (2011): Bariopharmacoalumite, a new mineral species from Cap Garonne, France and Mina Grande, Chile. Mineralogical Magazine 75, 135-144.
France (TL)
 
  • Provence-Alpes-Côte d'Azur
    • Var
      • Le Pradet
Mills, S. J., Rumsey, M. S., Favreau, G., Spratt, J., Raudsepp, M. and Dini M. (2011): Bariopharmacoalumite, a new mineral species from Cap Garonne, France and Mina Grande, Chile. Mineralogical Magazine 75, 135-144.; Sarp H., Chiappero P.-J., Favreau G. (1994) - Barium-zinc alumopharmacosiderite de la mine de Cap Garonne (Var, France). Archs. Sci. Genève 47 (1), pp. 45-50.
Georges Favreau collection (article in preparation)
Georges Favreau collection (article in preparation)
Germany
 
  • Baden-Württemberg
    • Black Forest
      • Calw
Walenta, K. (1966): Beiträge zur Kenntnis seltener Arsenatminerale unter besonderer Berücksichtigung von Vorkommen des Schwarzwalds. Tschermaks Mineral. Petrogr. Mitt. 11, 121-164; American Mineralogist: 70: 214
      • Lahr
        • Reichenbach
          • Weiler
Wittern: "Mineralfundorte in Deutschland", 2001
  • Saxony
    • Erzgebirge
Lapis 30(7/8):78-80 (2005)
Italy
 
  • Liguria
    • Genova Province
      • Ne
        • Graveglia Valley
          • Reppia
Mills, S.J., Rumsey, M.S., Favreau, G., Spratt, J., Raudsepp, M., Dini. M. (2011): Bariopharmacoalumite, a new mineral species from Cap Garonne, France and Mina Grande, Chile. Mineralogical Magazine, 75, 135-144.; Balestra, C., Bracco, R., Armellino, G., Leporatti, C., Callegari, A.M., Boiocchi, M., Costa, E., Ciriotti, M.E. (2012): Aggiornamenti di mineralogia sistematica ligure. Nuove specie della Val Graveglia. Micro 2/2012, 56-65.
Mineral and/or Locality  
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