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Aheylite

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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:
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:
Light blue crystals in dense clusters.


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Classification of AheyliteHide

Approved
Approval Year:
1984
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
42.9.3.5

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

19 : Phosphates
6 : Phosphates of Zn

Physical Properties of AheyliteHide

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

Chemical Properties of AheyliteHide

Formula:
(Fe2+,Zn)Al6(PO4)4(OH)8 · 4H2O
IMA Formula:
Fe2+Al6(PO4)4(OH)8 · 4H2O

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 (40)
3.67 (100)
3.44 (40)
3.40 (30)
3.27 (40)
2.91 (30)
2.89 (70)
2.02 (30)

Type Occurrence of AheyliteHide

Geological Setting of Type Material:
A late stage hydrothermal mineral in a base-metal-tin deposit
Associated Minerals at Type Locality:

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:
Other Members of this group:
ChalcosideriteCuFe3+6(PO4)4(OH)8 · 4H2OTric. 1 : P1
Faustite(Zn,Cu)Al6(PO4)4(OH)8 · 4H2OTric. 1 : P1
PlaneriteAl6(PO4)2(HPO4)2(OH)8 · 4 H2OTric. 1 : P1
TurquoiseCu(Al,Fe3+)6(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:
Cassiterite4 photos of Aheylite associated with Cassiterite on mindat.org.
Pyrite2 photos of Aheylite associated with Pyrite on mindat.org.
Quartz2 photos of Aheylite associated with Quartz on mindat.org.
Wavellite1 photo of Aheylite associated with Wavellite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

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.15Faustite(Zn,Cu)Al6(PO4)4(OH)8 · 4H2OTric. 1 : P1
8.DD.15PlaneriteAl6(PO4)2(HPO4)2(OH)8 · 4 H2OTric. 1 : P1
8.DD.15TurquoiseCu(Al,Fe3+)6(PO4)4(OH)8 · 4H2OTric. 1 : P1
8.DD.15AfmiteAl3(OH)4(H2O)3(PO4)(PO3OH) · H2OTric. 1 : P1
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.

Related Minerals - Dana Grouping (8th Ed.)Hide

42.9.3.1TurquoiseCu(Al,Fe3+)6(PO4)4(OH)8 · 4H2OTric. 1 : P1
42.9.3.2CoeruleolactiteTric. 1 : P1
42.9.3.3Faustite(Zn,Cu)Al6(PO4)4(OH)8 · 4H2OTric. 1 : P1
42.9.3.4ChalcosideriteCuFe3+6(PO4)4(OH)8 · 4H2OTric. 1 : P1
42.9.3.6PlaneriteAl6(PO4)2(HPO4)2(OH)8 · 4 H2OTric. 1 : P1
42.9.3.6AfmiteAl3(OH)4(H2O)3(PO4)(PO3OH) · H2OTric. 1 : P1

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

19.6.1TarbuttiteZn2(PO4)(OH)Tric. 1 : P1
19.6.2SpenceriteZn4(PO4)2(OH)2 · 3H2OMon. 2/m : P2/b
19.6.3HopeiteZn3(PO4)2 · 4H2OOrth. mmm (2/m 2/m 2/m) : Pnma
19.6.4ParahopeiteZn3(PO4)2 · 4H2OTric. 1 : P1
19.6.5Veszelyite(Cu,Zn)2Zn(PO4)2 · 2H2OMon. 2/m : P21/b
19.6.6Kipushite(Cu,Zn)5Zn(PO4)2(OH)6 · H2OMon.
19.6.7ScholziteCaZn2(PO4)2 · 2H2OOrth. mmm (2/m 2/m 2/m) : Pbcm
19.6.8ParascholziteCaZn2(PO4)2 · 2H2OMon.
19.6.9EhrleiteCa4Be3Zn2(PO4)6 · 9H2OTric. 1 : P1
19.6.10Faustite(Zn,Cu)Al6(PO4)4(OH)8 · 4H2OTric. 1 : P1
19.6.12JungiteCa2Zn4Fe3+8(PO4)9(OH)9 · 16H2OOrth.
19.6.13SchooneriteZnMn2+Fe2+2Fe3+(PO4)3(OH)2 · 9H2OOrth. mmm (2/m 2/m 2/m) : Pbam
19.6.14PhosphophylliteZn2Fe(PO4)2 · 4H2OMon. 2/m : P21/b

Fluorescence of AheyliteHide

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.

References for AheyliteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
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.

Internet Links 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 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Australia
 
  • Western Australia
    • Ashburton Shire
Nickel, E.H., Gartrell, B.J. (1993) Secondary Minerals of Ashburton Downs Western Australia, Mineralogical Record (May-June 1993) 24:3: 203-218.
Mineralogical Record 24,203-216,218.
Bolivia (TL)
 
  • Oruro Department
    • Dalence Province
      • Huanuni
[MinRec 32:472]
France
 
  • Auvergne-Rhône-Alpes
    • Allier
      • Ébreuil
        • Échassières
Le Règne Minéral, (33), 5-25.
UK
 
  • England
    • Cornwall
      • St Austell District
        • Treverbyn
          • Bugle
Goley, P. and Williams R. (1995) Cornish Mineral Reference Manual. Endsleigh Publications
Mineral and/or Locality  
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