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Barium-alumopharmacosiderite Mineral Data
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General Barium-alumopharmacosiderite Information
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 Chemical Formula: |
BaAl4(AsO4)3(OH)5•5(H2O) |
| Composition: |
Molecular Weight = 837.12 gm |
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Barium 16.40 % Ba 18.32 % BaO |
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Aluminum 12.89 % Al 24.36 % Al2O3 |
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Arsenic 26.85 % As 41.18 % As2O5 |
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Hydrogen 1.81 % H 16.14 % H2O |
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Oxygen 42.05 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
BaAl4(AsO4)3(OH)5•5(H2O) |
| IMA Status: |
Discredited IMA 1971 - Approved IMA 1966 |
| Locality: |
Link to MinDat.org Location Data. |
| Name Origin: |
Named in 1966 as the aluminum end member with barium pharmcosiderite. |
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Barium-alumopharmacosiderite Crystallography
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| Cell Dimensions: |
a = 7.7134, Z = 1; V = 458.92 Den(Calc)= 3.03 |
| Crystal System: |
Isometric - Hextetrahedral H-M Symbol (4 3m) Space Group: P 43m ? |
| X Ray Diffraction: |
By Intensity(I/Io): 7.8(1), 2.73(0.8), 3.16(0.7),3.87(0.7), 4.46(0.6), 2.32(0.5), 2.33(0.4), 2.44(0.4), |
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Physical Properties of Barium-alumopharmacosiderite
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| Color: |
Yellow. |
| Diaphaneity: |
Transparent to Translucent |
| Hardness: |
2-3 - Gypsum-Calcite |
| Luster: |
Vitreous (Glassy) |
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Optical Properties of Barium-alumopharmacosiderite
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| Optical Data: |
Uniaxial (?). |
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NCalc= 1.59 - from Gladstone-Dale relationship (KC = 0.1955) where Ncalc=Dcalc*KC+1
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Calculated Properties of Barium-alumopharmacosiderite
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| Electron Density: |
Bulk Density (Electron Density)=2.88 gm/cc
note: Specific Gravity of Barium-alumopharmacosiderite =3.03 gm/cc.
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| Fermion Index: |
Fermion Index = 0.02
Boson Index = 0.98 |
| Photoelectric: |
PEBarium-alumopharmacosiderite = 87.88 barns/electron
U=PEBarium-alumopharmacosiderite x rElectron Density= 253.20 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Barium-alumopharmacosiderite is Not Radioactive |
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Barium-alumopharmacosiderite Classification
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| Dana Class: |
42.08.01.04 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen |
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(42.08)where (AB)7 (XO4)4 Zq � x(H2O) |
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(42.08.01)Pharmacosiderite Group |
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42.08.01.01 Pharmacosiderite KFe4(AsO4)3(OH)4•6-7(H2O) I 43m 4 3m |
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42.08.01.02 Alumopharmacosiderite KAl4(AsO4)3(OH)4•6•5(H2O) P 43m 4 3m |
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42.08.01.03 Bariopharmacosiderite BaFe4(AsO4)3(OH)5•5(H2O) I 42m 4 2m |
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42.08.01.04 Barium-alumopharmacosiderite? BaAl4(AsO4)3(OH)5•5(H2O) P 43m ? 4 3m |
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42.08.01.05 Natropharmacosiderite (Na,K)2Fe4(AsO4)3(OH)5•7(H2O) P 43m 4 3m |
| Strunz Class: |
08.DK.10 08 - PHOSPHATES, ARSENATES, VANADATES |
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08.D - Phosphates, etc |
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08.DK -With large and medium-sized cations, (OH, etc.):RO4 > 1:1 and < 2:1 |
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08.DK.10 Alumopharmacosiderite KAl4(AsO4)3(OH)4•6•5(H2O) P 43m 4 3m |
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08.DK.10 Barium-alumopharmacosiderite? BaAl4(AsO4)3(OH)5•5(H2O) P 43m ? 4 3m |
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08.DK.10 Bariopharmacosiderite BaFe4(AsO4)3(OH)5•5(H2O) I 42m 4 2m |
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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 |
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08.DK.10 Pharmacosiderite KFe4(AsO4)3(OH)4•6-7(H2O) I 43m 4 3m |
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08.DK.10 Natropharmacosiderite (Na,K)2Fe4(AsO4)3(OH)5•7(H2O) P 43m 4 3m |
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Other Barium-alumopharmacosiderite Information
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| References: |
NAME( Dana8) PHYS. PROP.(Bull.Miner.,Vol.107-111,1984-1988) |
| See Also: |
Links to other databases for Barium-alumopharmacosiderite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info
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Print or Cut-and-Paste your Barium-alumopharmacosiderite Specimen Label here :
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Barium-alumopharmacosiderite
BaAl4(AsO4)3(OH)5•5(H2O)
Dana No: 42.08.01.04 Strunz No: 08.DK.10
Locality:
Notes:
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