Barium-zinc-alumopharmacosiderite Mineral Data

General Barium-zinc-alumopharmacosiderite Information

Chemical Formula:

(Ba,K)0.5(Zn,Cu)0.5(Al,Fe)4(AsO4)3•5(H2O)

Composition:

Molecular Weight = 689.30 gm

Potassium 0.28 % K 0.34 % K₂O

Barium 3.98 % Ba 4.45 % BaO

Aluminum 11.74 % Al 22.19 % Al₂O₃

Zinc 1.90 % Zn 2.36 % ZnO

Iron 8.10 % Fe 11.58 % Fe₂O₃

Copper 0.46 % Cu 0.58 % CuO

Arsenic 32.61 % As 50.02 % As₂O₅

Hydrogen 1.46 % H 13.07 % H₂O

Oxygen 39.46 % O

______ ______

100.00 % 104.58 % = TOTAL OXIDE

Empirical Formula:

0.5(Ba_0.4)0.5(K_0.1)0.5(Zn_0.4)0.5(Cu_0.1)Al₃Fe³⁺(AsO₄)₃ï¿½5(H₂O)

IMA Status:

Not Approved IMA

Locality:

Link to MinDat.org Location Data.

Name Origin:

Named as the Ba and Zn analog of pharmacosiderite.

Barium-zinc-alumopharmacosiderite Crystallography

Axial Ratios:

a:c = 1:1.01285

Cell Dimensions:

a = 15.476, c = 15.675, Z = 6; V = 3,754.27 Den(Calc)= 1.83

Crystal System:

Tetragonal - Scalenohedral H-M Symbol (4 2m) Space Group: I 42m

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 7.736(1), 7.824(1), 2.754(0.6),

Physical Properties of Barium-zinc-alumopharmacosiderite

Color:

Colorless, Yellow.

Density:

2.8

Diaphaneity:

Transparent

Hardness:

2.5 - Finger Nail

Luster:

Vitreous (Glassy)

Optical Properties of Barium-zinc-alumopharmacosiderite

Gladstone-Dale:

CI meas= 0.077 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= -0.413 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.3093,KPDmeas= 0.2021,KC= 0.2189
Ncalc = 1.4 - 1.61

Optical Data:

Uniaxial (-), e=1.56, w=1.572, bire=0.0120.

Calculated Properties of Barium-zinc-alumopharmacosiderite

Electron Density:

Bulk Density (Electron Density)=2.68 gm/cc
note: Specific Gravity of Barium-zinc-alumopharmacosiderite =2.80 gm/cc.

Fermion Index:

Fermion Index = 0.009788666
Boson Index = 0.990211334

Photoelectric:

PE_{Barium-zinc-alumopharmacosiderite}= 42.80 barns/electron
U=PE_{Barium-zinc-alumopharmacosiderite} x r_electron= 114.61 barns/cc.

Radioactivity:

GRapi = 3.92 (Gamma Ray American Petroleum Institute Units)
Concentration of Barium-zinc-alumopharmacosiderite per GRapi unit = 25.53 (%)

Estimated Radioactivity from Barium-zinc-alumopharmacosiderite - barely detectable

Barium-zinc-alumopharmacosiderite Classification

Dana Class:

37.00.00.00 (37)Phosphate Minerals

(37.00)Without Dana Classification Numbers

(37.00.00)Arsenate, Hydrated

37.00.00.00 Arnhemite* (K,Na)2Mg2(P2O7)•5(H2O) Unk Hex

37.00.00.00 Arsenowaylandite* BiAl3(AsO4)2(OH)6 R 3m 3 2/m

37.00.00.00 Auroantimonate* AuSbO3 Ortho ? Ortho

37.00.00.00 Barium-zinc-alumopharmacosiderite* (Ba,K)0.5(Zn,Cu)0.5(Al,Fe)4(AsO4)3•5(H2O) I 42m 4 2m

37.00.00.00 Chernovite-(Ce)* (Ce,Y)(AsO4) I 4₁/amd 4/m 2/m 2/m

37.00.00.00 Churchite-(Dy)* (Dy,Sm,Gd,Nd)(PO4)•2(H2O) Mono

37.00.00.00 Gengenbachite KFe3(H2PO4)2(HPO4)4•6H2OorKFe3H8(PO4)6•6H2O P 6₃mc 6mm

37.00.00.00 IMA2008-063 Pb[Zn0.25,[]0.75]Fe3H(AsO4)2(OH)6 C 2/c 2/m

37.00.00.00 IMA2009-005 (Y,Ca,REE)5[(Si,P)O4]3F P 6₃/m 6/m 2/m 2/m

37.00.00.00 IMA2009-016 Cu4H(AsO4)2(OH)3•H2O P1 1

37.00.00.00 Kerstenite? PbSeO4(?) P nma 2/m 2/m 2/m

37.00.00.00 Krasnoselskite* CoWO4 P 2/c 2/m

37.00.00.00 Laubmannite? Fe3Fe6(PO4)4(OH)12 Unk Ortho

37.00.00.00 Oxiberaunite* (Fe,Mn)Fe5(PO4)4O(OH)4•6(H2O) Mono

37.00.00.00 Parwanite (Na,K)(Mg,Ca)4Al8(PO4)8(CO3)(OH)7•30H2O P 2, Pm, P 2/m, P 2₁, Mono

37.00.00.00 Pyrocoproite* (Mg(K,Na))2P2O7 Unk Mono

37.00.00.00 Pyrophosphite* K2CaP2O7 P 2₁/n 2/m

37.00.00.00 Zinclavendulan? NaCa(Zn,Cu)5(AsO4)4Cl•4-5(H2O) Unk Ortho

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 Barium-zinc-alumopharmacosiderite Information

References:

PHYS. PROP.(37th List of New Min.,Min. Mag.,1996) OPTIC PROP.(37th List of New Min.,Min. Mag.,19)

See Also:

Links to other databases for Barium-zinc-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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Barium-zinc-alumopharmacosiderite

(Ba,K)0.5(Zn,Cu)0.5(Al,Fe)4(AsO4)3•5(H2O)
Dana No: 37.00.00.00 Strunz No: 08.DK.10
Locality:

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