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Alumopharmacosiderite Mineral Data

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General Alumopharmacosiderite Information

Help on Chemical  Formula: Chemical Formula: KAl4(AsO4)3(OH)4•6•5(H2O)
Help on Composition: Composition: Molecular Weight = 748.91 gm
   Potassium   5.22 %  K     6.29 % K2O
   Aluminum   14.41 %  Al   27.23 % Al2O3
   Arsenic    30.01 %  As   46.03 % As2O5
   Hydrogen    2.29 %  H    20.45 % H2O
   Oxygen     48.07 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: KAl4(AsO4)3(OH)4•6.5(H2O)
Help on Environment: Environment: With other oxidized arsenates on a museum specimen.
Help on IMA Status: IMA Status: Approved IMA 1981
Help on Locality: Locality: From the [Emma Louisa gold mine,] Guanaco district, about 100 km east-northeast of Taltal, Antofagasta, Chile. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: As the ALUMinum analog of "pharmacosiderite."
Help on Synonym: Synonym: ICSD 76972
  PDF 34-670
 

Alumopharmacosiderite Image

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  Alumopharmacosiderite   Olivenite

Comments: Minute white specks of alumopharmacosiderite, with tan olivenite and unknown orange material.
Location: Gold Hill, Gold Hill District (Clifton District), Deep Creek Mts, Tooele Co., Utah, USA. Scale: Picture Size 2 mm.
© Jeff Weissman / Photographic Guide to Mineral Species

Alumopharmacosiderite Crystallography

Help on Cell Dimensions: Cell Dimensions: a = 7.745, Z = 1; V = 464.58 Den(Calc)= 2.68
Help on Crystal System: Crystal System: Isometric - Hextetrahedral H-M Symbol (4 3m) Space Group: P 43m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 7.77(1), 2.739(0.6), 4.48(0.5),
 

Physical Properties of Alumopharmacosiderite

Help on Color: Color: White.
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Alumopharmacosiderite

Help on Gladstone-Dale: Gladstone-Dale: CI calc= 0.009 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2108,KC= 0.2128
Ncalc = 1.57
Help on Optical Data: Optical Data: Isotropic, n=1.565.
 

Calculated Properties of Alumopharmacosiderite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.63 gm/cc
note: Specific Gravity of Alumopharmacosiderite =2.68 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0002404233
Boson Index = 0.9997595767
Help on Photoelectric: Photoelectric: PEAlumopharmacosiderite = 20.85 barns/electron
U=PEAlumopharmacosiderite x relectron= 54.77 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 73.83 (Gamma Ray American Petroleum Institute Units)
Concentration of Alumopharmacosiderite per GRapi unit = 1.35 (%)

Estimated Radioactivity from Alumopharmacosiderite - barely detectable

 

Alumopharmacosiderite Classification

Help on  Dana Class: Dana Class: 42.08.01.02 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
  (42.08)where (AB)7 (XO4)4 Zq � x(H2O)
  (42.08.01)Pharmacosiderite Group
 
42.08.01.01 Pharmacosiderite KFe4(AsO4)3(OH)4•6-7(H2O) I 43m 4 3m
 
42.08.01.02 Alumopharmacosiderite KAl4(AsO4)3(OH)4•6•5(H2O) P 43m 4 3m
 
42.08.01.03 Bariopharmacosiderite BaFe4(AsO4)3(OH)5•5(H2O) I 42m 4 2m
 
42.08.01.04 Barium-alumopharmacosiderite? BaAl4(AsO4)3(OH)5•5(H2O) P 43m ? 4 3m
 
42.08.01.05 Natropharmacosiderite (Na,K)2Fe4(AsO4)3(OH)5•7(H2O) P 43m 4 3m
Help on  Strunz Class: Strunz Class: 08.DK.10 08 - PHOSPHATES, ARSENATES, VANADATES
  08.D - Phosphates, etc
  08.DK -With large and medium-sized cations, (OH, etc.):RO4 > 1:1 and < 2:1
 
08.DK.10 Alumopharmacosiderite KAl4(AsO4)3(OH)4•6•5(H2O) P 43m 4 3m
 
08.DK.10 Barium-alumopharmacosiderite? BaAl4(AsO4)3(OH)5•5(H2O) P 43m ? 4 3m
 
08.DK.10 Bariopharmacosiderite BaFe4(AsO4)3(OH)5•5(H2O) I 42m 4 2m
 
08.DK.10 Barium-zinc-alumopharmacosiderite* (Ba,K)0.5(Zn,Cu)0.5(Al,Fe)4(AsO4)3•5(H2O) I 42m 4 2m
 
08.DK.10 Pharmacosiderite KFe4(AsO4)3(OH)4•6-7(H2O) I 43m 4 3m
 
08.DK.10 Natropharmacosiderite (Na,K)2Fe4(AsO4)3(OH)5•7(H2O) P 43m 4 3m
 

Other Alumopharmacosiderite Information

Help on References: References: NAME( AntBidBlaNic4) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Alumopharmacosiderite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - Ecole des Mines de Paris
4 - GeoScienceWorld
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info

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Print or Cut-and-Paste your Alumopharmacosiderite Specimen Label here :

Alumopharmacosiderite

KAl4(AsO4)3(OH)4•6•5(H2O)
Dana No: 42.08.01.02 Strunz No: 08.DK.10
Locality:

 

Notes:

 

 
   
 


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