Aheylite Mineral Data

General Aheylite Information

Chemical Formula:

(Fe++,Zn)Al6(PO4)4(OH)8•4(H2O)

Composition:

Molecular Weight = 806.08 gm

Aluminum 20.08 % Al 37.95 % Al₂O₃

Zinc 3.24 % Zn 4.04 % ZnO

Iron 3.46 % Fe 4.46 % FeO

Phosphorus 15.37 % P 35.22 % P₂O₅

Hydrogen 2.06 % H 18.44 % H₂O

Oxygen 55.77 % O

______ ______

100.00 % 100.10 % = TOTAL OXIDE

Empirical Formula:

Fe²⁺_0.5Zn_0.4Al₆(PO₄)_3.7(PO₃OH)_0.3(OH)₈ï¿½4.1(H₂O)

Environment:

Late stage hydrothermal mineral in a base-metal tin deposit.

IMA Status:

Approved IMA 1986

Locality:

Huanuni mine, Mina Flores Mountain, Huanuni district, Bolivia. Link to MinDat.org Location Data.

Name Origin:

Named for Allen V. Heyl (1918-), economic geologist, U. S. Geological Survey.

Name Pronunciation:

Aheylite

Aheylite Image

Images:

Aheylite

Comments: Colorless radiating spray of aheylite crystals.
Location: Huanuni, Bolivia. Scale: Picture size 3 mm.
© Thomas Witzke / Abraxas-Verlag

Aheylite Crystallography

Axial Ratios:

a:b:c =0.7477:1:0.7707

Cell Dimensions:

a = 7.4, b = 9.896, c = 7.627, Z = 1; alpha = 110.87°, beta = 115°, gamma = 69.96° V = 444.35 Den(Calc)= 3.01

Crystal System:

Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1

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

By Intensity(I/I_o): 3.67(1), 2.888(0.67), 6.146(0.43),

Physical Properties of Aheylite

Cleavage:

{???} Good

Color:

Blue green.

Density:

2.85

Diaphaneity:

Transparent

Fracture:

Hackly - Jagged, torn surfaces, (e.g. fractured metals).

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Habit:

Botryoidal - "Grape-like" rounded forms (e.g.. malachite).

Habit:

Felted - Occurs as minute crystalling aggregates with the form of felt material.

Hardness:

5-6 - Between Apatite and Orthoclase

Luster:

Vitreous - Dull

Streak:

greenish white

Optical Properties of Aheylite

Gladstone-Dale:

CI meas= -0.003 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.018 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2165,KPDmeas= 0.2211,KC= 0.2205
Ncalc = 1.63 - 1.64

Optical Data:

Biaxial (+), b=1.63

Calculated Properties of Aheylite

Electron Density:

Bulk Density (Electron Density)=2.86 gm/cc
note: Specific Gravity of Aheylite =2.85 gm/cc.

Fermion Index:

Fermion Index = 0.0023355915
Boson Index = 0.9976644085

Photoelectric:

PE_Aheylite= 3.92 barns/electron
U=PE_Aheylite x rElectron Density= 11.20 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Aheylite is Not Radioactive

Aheylite Classification

Dana Class:

42.09.03.05 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen

(42.09)where (A)3 (XO4)2 Zq ï¿½ x(H2O)

(42.09.03)Turquoise Group

42.09.03.01 Turquoise CuAl6(PO4)4(OH)8•4(H2O) P1 1

42.09.03.02 Coeruleolactite (Ca,Cu)Al6(PO4)4(OH)8•4-5(H2O) P1 1

42.09.03.03 Faustite (Zn,Cu)Al6(PO4)4(OH)8•4(H2O) P1 1

42.09.03.04 Chalcosiderite CuFe6(PO4)4(OH)8•4(H2O) P1 1

42.09.03.05 Aheylite (Fe,Zn)Al6(PO4)4(OH)8•4(H2O) P1 1

42.09.03.06 Planerite Al6(PO4)2(PO3OH)2(OH)8•4(H2O) P1 1

Strunz Class:

08.DD.15 08 - PHOSPHATES, ARSENATES, VANADATES

08.D - Phosphates, etc

08.DD -With only medium-sized cations, (OH, etc.):RO4 = 2:1

08.DD.15 Aheylite (Fe,Zn)Al6(PO4)4(OH)8•4(H2O) P1 1

08.DD.15 Chalcosiderite CuFe6(PO4)4(OH)8•4(H2O) P1 1

08.DD.15 Faustite (Zn,Cu)Al6(PO4)4(OH)8•4(H2O) P1 1

08.DD.15 Planerite Al6(PO4)2(PO3OH)2(OH)8•4(H2O) P1 1

08.DD.15 Turquoise CuAl6(PO4)4(OH)8•4(H2O) P1 1

Other Aheylite Information

References:

NAME( AntBidBlaNic4) PHYS. PROP.(37th List of New Min.,Min. Mag.,1996) OPTIC PROP.(AntBidBlaNic4)

See Also:

Links to other databases for Aheylite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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

Aheylite

(Fe++,Zn)Al6(PO4)4(OH)8•4(H2O)
Dana No: 42.09.03.05 Strunz No: 08.DD.15
Locality:

Notes:

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