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Aheylite

A valid IMA mineral species
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05539130014948705926792.jpg
Aheylite, etc.

Huanuni mine, Huanuni, Pantaleón Dalence Province, Oruro, Bolivia
07472990014950919729283.jpg
Aheylite

Huanuni mine, Huanuni, Pantaleón Dalence Province, Oruro, Bolivia
00367780014950919732150.jpg
Aheylite

Huanuni, Pantaleón Dalence Province, Oruro, Bolivia
05539130014948705926792.jpg
Aheylite, etc.

Huanuni mine, Huanuni, Pantaleón Dalence Province, Oruro, Bolivia
02423170014949191065812.jpg
Aheylite

Huanuni mine, Huanuni, Pantaleón Dalence Province, Oruro, Bolivia
00367780014950919732150.jpg
Aheylite

Huanuni, Pantaleón Dalence Province, Oruro, Bolivia
05539130014948705926792.jpg
Aheylite, etc.

Huanuni mine, Huanuni, Pantaleón Dalence Province, Oruro, Bolivia
07472990014950919729283.jpg
Aheylite

Huanuni mine, Huanuni, Pantaleón Dalence Province, Oruro, Bolivia
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About AheyliteHide

03674250016147263871919.jpg
Allen V.Heyl
Formula:
(Fe2+,Zn)Al6(PO4)4(OH)8 · 4H2O
Colour:
Very pale blue, pale green, to blue-green
Lustre:
Sub-Vitreous
Hardness:
5 - 5½
Specific Gravity:
3.22
Crystal System:
Triclinic
Member of:
Turquoise Group
Name:
Named in 1998 by Eugene E. Foord and Joseph E. Taggert in honor of Allen V. Heyl (1918-2008), economic geologist of the U. S. Geological Survey.
Isostructural with:
Turquoise
Light blue crystals in dense clusters.


Unique IdentifiersHide

Mindat ID:
60
Long-form identifier:
mindat:1:1:60:0
GUID
(UUID V4):
92b66abc-8c3e-46ad-bc6d-58c75f39e7a7

IMA Classification of AheyliteHide

Classification of AheyliteHide

Strunz-mindat (2024):
8.DD.15

8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
D : With only medium-sized cations, (OH, etc.):RO4= 2:1
Dana 8th ed.:
42.9.3.5

42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
9 : (AB)7(XO4)4Zq·xH2O
Hey's CIM Ref.:
19.6.11

19 : Phosphates
6 : Phosphates of Zn

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference
AheIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of AheyliteHide

Lustre:
Sub-Vitreous
Transparency:
Transparent
Colour:
Very pale blue, pale green, to blue-green
Streak:
greenish white
Hardness:
5 - 5½ on Mohs scale
Tenacity:
Brittle
Cleavage:
Perfect
{001}, also {010} good
Fracture:
Hackly
Density:
3.22 g/cm3 (Measured)    3.26 g/cm3 (Calculated)

Optical Data of AheyliteHide

Type:
Biaxial (+)
Dispersion:
r > v
Pleochroism:
Non-pleochroic
Comments:
Mean RI 1.63.
Individual indices could not be determined due to small grain size.

Chemistry of AheyliteHide

Mindat Formula:
(Fe2+,Zn)Al6(PO4)4(OH)8 · 4H2O
Elements listed:
Al, Fe, H, O, P, Zn - search for minerals with similar chemistry

Crystallography of AheyliteHide

Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 7.885 Å, b = 10.199 Å, c = 7.672 Å
α = 110.84°, β = 115.12°, γ = 67.51°
Ratio:
a:b:c = 0.773 : 1 : 0.752
Unit Cell V:
502.16 ų (Calculated from Unit Cell)
Z:
1
Morphology:
Dense clusters of crystals ideally displaying typical turquoise group morphology: short prismatic with large {001}, {010}, {1-10}, and {-1-11}.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
6.15 Å(40)
3.67 Å(100)
3.44 Å(40)
3.40 Å(30)
3.27 Å(40)
2.91 Å(30)
2.89 Å(70)
2.02 Å(30)

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 7: Great Oxidation Event<2.4
47a : [Near-surface hydration of prior minerals]
47c : [Carbonates, phosphates, borates, nitrates]

Type Occurrence of AheyliteHide

Type Locality:
ⓘ Huanuni mine, Huanuni, Pantaleón Dalence Province, Oruro, Bolivia
General Appearance of Type Material:
Isolated and aggregate clumps of hemispherical or spherical, radiating to interlocked masses of crystals that average 3 µm in maximum dimension.
Place of Conservation of Type Material:
No designated type material.
Geological Setting of Type Material:
A late stage hydrothermal mineral in a base-metal-tin deposit.
Associated Minerals at Type Locality:
WavelliteVivianiteVarisciteSphaleriteQuartz
PyriteCassiterite
Reference:
Foord, E.E., Taggart, J.E. (1998) A reexamination of the turquoise group; the mineral aheylite, planerite (redefined), turquoise and coeruleolactite. Mineralogical Magazine: 62: 93-111.
Download:
https://rruff.info/rruff_1.0/uploads/MM62_93.pdf

Synonyms of AheyliteHide

Other Language Names for AheyliteHide

Czech:Aheylit
German:Aheylit
Italian:Aheylite
Latvian:Aheilīts
Spanish:Aheylita

Relationship of Aheylite to other SpeciesHide

Member of:
Turquoise Group
Other Members of this group:
ChalcosideriteCuFe3+6(PO4)4(OH)8 · 4H2OTric. 1 : P1
FaustiteZnAl6(PO4)4(OH)8 · 4H2OTric. 1 : P1
PlaneriteAl6(PO4)2(PO3OH)2(OH)8 · 4H2OTric. 1 : P1
TurquoiseCuAl6(PO4)4(OH)8 · 4H2OTric. 1 : P1
UM1981-32-PO:FeHFe2+Fe3+6(PO4)4-x[PO3(OH)]x(OH)8 · 4H2O

Common AssociatesHide

Associated Minerals Based on Photo Data:
5 photos of Aheylite associated with WavelliteAl3(PO4)2(OH,F)3 · 5H2O
4 photos of Aheylite associated with CassiteriteSnO2
2 photos of Aheylite associated with PyriteFeS2
2 photos of Aheylite associated with QuartzSiO2

Related Minerals - Strunz-mindat GroupingHide

8.DD.Bettertonite[Al6(AsO4)3(OH)9(H2O)5] · 11H2OMon. 2/m : P21/b
8.DD.Penberthycroftite[Al6(AsO4)3(OH)9(H2O)5] · 8H2OMon. 2/m : P21/b
8.DD.VargiteCu2Mn3(AsO4)2(OH)4(H2O)4Mon. 2/m : P21/b
8.DD.GaleaclolusiteAl6(AsO4)3(OH)9(H2O)4 · 8H2OOrth. mmm (2/m 2/m 2/m) : Pnma
8.DD.05ChenevixiteCu2Fe3+2(AsO4)2(OH)4Mon. 2/m : P21/m
8.DD.05LuetheiteCu2Al2(AsO4)2(OH)4Mon. 2/m : P21/m
8.DD.10Akrochordite(Mn2+,Mg)5(AsO4)2(OH)4 · 4H2OMon. 2/m : P21/b
8.DD.10GuanacoiteCu2Mg3(AsO4)2(OH)4 · 4H2OMon. 2/m : P21/b
8.DD.15ChalcosideriteCuFe3+6(PO4)4(OH)8 · 4H2OTric. 1 : P1
8.DD.15CoeruleolactiteTric. 1 : P1
8.DD.15FaustiteZnAl6(PO4)4(OH)8 · 4H2OTric. 1 : P1
8.DD.15PlaneriteAl6(PO4)2(PO3OH)2(OH)8 · 4H2OTric. 1 : P1
8.DD.15TurquoiseCuAl6(PO4)4(OH)8 · 4H2OTric. 1 : P1
8.DD.15AfmiteAl3(OH)4(H2O)3(PO4)(PO3OH) · H2OTric. 1 : P1
8.DD.15UM1981-32-PO:FeHFe2+Fe3+6(PO4)4-x[PO3(OH)]x(OH)8 · 4H2O
8.DD.20ChildreniteFe2+Al(PO4)(OH)2 · H2OOrth. mm2 : Ccc2
8.DD.20EosphoriteMn2+Al(PO4)(OH)2 · H2OOrth. mmm (2/m 2/m 2/m) : Cmca
8.DD.20Ernstite(Mn2+,Fe3+)Al(PO4)(OH,O)2 · H2OMon.
8.DD.20LefontiteFe2Al2Be(PO4)2(OH)6Orth. mmm (2/m 2/m 2/m) : Cmca
8.DD.25KobokoboiteAl6(PO4)4(OH)6 · 11H2O Tric.
8.DD.30SmamiteCa2Sb(OH)4[H(AsO4)2] · 6H2OTric. 1 : P1
8.DD.35GutsevichiteAl3(PO4)2(OH)3 · 8H2OIso.
8.DD.40Laubmannite (of Moore)(Fe3+,Fe2+,M)8+x(OH,H2O)9(H2O)2(PO4)5, M = Fe3+, Cu2+ or other metal cation, x ~ 0.1.Orth. mmm (2/m 2/m 2/m) : Pbcm

Fluorescence of AheyliteHide

In UV light:
Non-fluorescent

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.

Internet Links for AheyliteHide

References for AheyliteHide

Localities for AheyliteHide

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 references and 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 (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Australia
 
  • Western Australia
    • Ashburton Shire
Nickel et al. (1993)
Mineralogical Record 24
Bolivia (TL)
 
  • Oruro
    • Pantaleón Dalence Province
      • Huanuni
Wilson (2001) +1 other reference
France
 
  • Auvergne-Rhône-Alpes
    • Allier
      • Vichy
        • Échassières
          • Montmins mining district
Collected by Chollet Pascal - analysed ... +3 other references
Cuchet et al. (2000)
UK
 
  • England
    • Cornwall
      • Treverbyn
        • Bugle
Golley et al. (1995)
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