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Natropharmacoalumite

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About NatropharmacoalumiteHide

Formula:
NaAl4(AsO4)3(OH)4 · 4H2O
Colour:
colorless
Lustre:
Adamantine, Vitreous
Hardness:
Specific Gravity:
2.564 (Calculated)
Crystal System:
Isometric
Name:
The new mineral is named natropharmacoalumite, and follows the already established prefix-based nomenclature of the pharmacosiderite supergroup. The name is in allusion to the cation dominance of Na and Al.
Isostructural with:

Classification of NatropharmacoalumiteHide

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.2

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

Physical Properties of NatropharmacoalumiteHide

Adamantine, Vitreous
Transparency:
Transparent
Colour:
colorless
Streak:
white
Hardness:
2½ on Mohs scale
Hardness:
VHN100=267 - Vickers
Tenacity:
Brittle
Cleavage:
Imperfect/Fair
imperfect cleavage on {100}.
Fracture:
Irregular/Uneven
Density:
2.564 g/cm3 (Calculated)

Optical Data of NatropharmacoalumiteHide

Type:
Isotropic
RI values:
n = 1.556
Birefringence:
Isotropic minerals have no birefringence
Surface Relief:
Low
Internal Reflections:
white
Comments:
assumed to be anomalously biaxial, anomalous birefringence is typical in members of the pharmacosiderite group

Chemical Properties of NatropharmacoalumiteHide

Formula:
NaAl4(AsO4)3(OH)4 · 4H2O

Crystallography of NatropharmacoalumiteHide

Crystal System:
Isometric
Class (H-M):
4 3m - Hextetrahedral
Space Group:
P4 3m
Setting:
P4 3m
Cell Parameters:
a = 7.7280(3) Å
Unit Cell V:
461.53 ų (Calculated from Unit Cell)
Z:
1

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
7.759 (100)
4.473 (40)
3.870 (50)
3.459 (6)
3.158 (6)
2.736 (6)
2.446 (9)
2.331 (12)

Type Occurrence of NatropharmacoalumiteHide

General Appearance of Type Material:
intergrown cubic crystals
Place of Conservation of Type Material:
Natural History Museum, London, England, catalog no. BM 2009,161
Geological Setting of Type Material:
Oxidation zone of a gold mine
Associated Minerals at Type Locality:

Synonyms of NatropharmacoalumiteHide

Relationship of Natropharmacoalumite 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
PharmacoalumiteKAl4(AsO4)3(OH)4 · 6.5H2OIso. 4 3m : P4 3m

Common AssociatesHide

Associated Minerals Based on Photo Data:
Natropharmacosiderite3 photos of Natropharmacoalumite associated with Natropharmacosiderite on mindat.org.
Goethite2 photos of Natropharmacoalumite associated with Goethite 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.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.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.3Barium-zinc-alumopharmacosideriteBa0.5Al4(AsO4)3(OH)4 · 4H2OTet.
42.8.1b.3BariopharmacoalumiteBa0.5Al4(AsO4)3(OH)4 · 4H2OIso. 4 3m : P4 3m

Fluorescence of NatropharmacoalumiteHide

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 NatropharmacoalumiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
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

Internet Links for NatropharmacoalumiteHide

Localities for NatropharmacoalumiteHide

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
 
  • Tarapacá Region
    • Iquique Province
      • Salar Grande
SEM-EDS by Joy Desor
Greece
 
  • Attikí Prefecture (Attica; Attika)
    • Lavrion District (Laurion; Laurium; Lavreotiki Municipality)
      • Lavrion District Mines
        • Agios Konstantinos [St Constantine] (Kamariza)
Möckel, S. (2000): Strashimirit und 11 weitere Neubestimmungen aus Lavrion (GR). Lapis 25 (7-8), 74.
Spain (TL)
 
  • Andalusia
    • Almería
      • Níjar
        • Rodalquilar
CNMNC Newsletter, June 2010, 578; Min.Mag, 74,577-579(2010); 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
Mineral and/or Locality  
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