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Luetheite

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About LuetheiteHide

Formula:
Cu2Al2(AsO4)2(OH)4
Colour:
blue, pale green (upon alteration).
Hardness:
3
Specific Gravity:
4.28
Crystal System:
Monoclinic
Name:
After Ronald D. Luethe (1944– ), geologist for Phelps Dodge Corporation, Douglas, Arizona, USA, who found the first material.
The aluminium analogue of Chenevixite. Chenevixite-Luetheite Series.


Classification of LuetheiteHide

Approved
Approval Year:
1976
8.DD.05

8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
D : With only medium-sized cations, (OH, etc.):RO4= 2:1
42.7.10.2

42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
7 : (AB)2(XO4)Zq·xH2O
20.4.4

20 : Arsenates (also arsenates with phosphate, but without other anions)
4 : Arsenates of Group III metals (Al, rare earths)

Physical Properties of LuetheiteHide

Transparency:
Translucent
Colour:
blue, pale green (upon alteration).
Comment:
May be tan
Streak:
white
Hardness:
Tenacity:
Brittle
Cleavage:
Distinct/Good
On {100}, fair to good.
Density:
4.28 g/cm3 (Measured)    4.4 g/cm3 (Calculated)

Optical Data of LuetheiteHide

Type:
Biaxial (+)
RI values:
nα = 1.752 nβ = 1.775 nγ = 1.796
2V:
Calculated: 88°
Max Birefringence:
δ = 0.044
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High
Dispersion:
r < v marked
Pleochroism:
Weak
Comments:
Faint in pale blues.

Chemical Properties of LuetheiteHide

Formula:
Cu2Al2(AsO4)2(OH)4
IMA Formula:
Cu2Al2(AsO4)2(OH)4 · H2O

Crystallography of LuetheiteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/m
Cell Parameters:
a = 14.743 Å, b = 5.093 Å, c = 5.598 Å
β = 101.49°
Ratio:
a:b:c = 2.895 : 1 : 1.099
Unit Cell V:
411.91 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Crystals thin blades exhibiting prominent {100} with {140} and {011}. Commonly in spherulitic aggregates.
Twinning:
Observed at a very fine scale.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
7.21 (7)
3.498 (10)
2.546 (3)
2.507 (5)
2.454 (3)
1.803 (5)
1.270 (4)

Type Occurrence of LuetheiteHide

General Appearance of Type Material:
Cavity fillings.
Geological Setting of Type Material:
Intensely altered volcanic rocks.
Associated Minerals at Type Locality:

Synonyms of LuetheiteHide

Other Language Names for LuetheiteHide

Relationship of Luetheite to other SpeciesHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Chalcosiderite2 photos of Luetheite associated with Chalcosiderite on mindat.org.
Pharmacosiderite1 photo of Luetheite associated with Pharmacosiderite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

8.DD.05ChenevixiteCu2Fe3+2(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.15Aheylite(Fe2+,Zn)Al6(PO4)4(OH)8 · 4H2OTric. 1 : P1
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

42.7.10.1ChenevixiteCu2Fe3+2(AsO4)2(OH)4Mon. 2/m : P21/m

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

20.4.1MansfielditeAlAsO4 · 2H2OOrth. mmm (2/m 2/m 2/m) : Pbca
20.4.2BulachiteAl2(AsO4)(OH)3 · 3H2OOrth.
20.4.3PharmacoalumiteKAl4(AsO4)3(OH)4 · 6.5H2OIso. 4 3m : P4 3m
20.4.5ArsenogoyaziteSrAl3(AsO4)(AsO3OH)(OH)6Trig. 3m (3 2/m) : R3m
20.4.6ArsenocrandalliteCaAl3(AsO4)(AsO3OH)(OH)6Trig. 3m (3 2/m)
20.4.7Arsenoflorencite-(Ce)CeAl3(AsO4)2(OH)6Trig. 3m (3 2/m) : R3m
20.4.8Arsenoflorencite-(La)LaAl3(AsO4)2(OH)6Trig. 3m (3 2/m) : R3m
20.4.9Arsenoflorencite-(Nd)NdAl3(AsO4)2(OH)6Trig.
20.4.10Gerdtremmelite(Zn,Fe)(Al,Fe)2(AsO4)(OH)5Tric.
20.4.11Gasparite-(Ce)Ce(AsO4)
20.4.12Chernovite-(Y)Y(AsO4)Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
20.4.13Agardite-(Y)YCu6(AsO4)3(OH)6 · 3H2OHex. 6/m : P63/m
20.4.14Agardite-(La)LaCu6(AsO4)3(OH)6 · 3H2OHex. 6/m
20.4.15GoudeyiteAlCu6(AsO4)3(OH)6 · 3H2OHex.
20.4.16Retzian-(Ce)Mn2+2Ce(AsO4)(OH)4Orth. mmm (2/m 2/m 2/m) : Pban
20.4.17Retzian-(La)(Mn2+,Mg)2(La,Ce,Nd)(AsO4)(OH)4Orth. mmm (2/m 2/m 2/m) : Pban
20.4.18Retzian-(Nd)Mn2+2(Nd,Ce,La)(AsO4)(OH)4Orth. mmm (2/m 2/m 2/m) : Pban

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 LuetheiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Williams, S. A. (1977): Luetheite, Cu2Al2(AsO4)2(OH)4.H2O, a new mineral from Arizona, compared with chenevixite. Mineralogical Magazine: 41: 27-32.
American Mineralogist (1977): 62: 1058.
Burns, P. C., Smith, J. V. and Steele, I. M. (2000): Arizona porphyry copper/hydrothermal deposits I. The structure of chenevixite and luetheite. Mineral. Mag., 64, 25-30.

Internet Links for LuetheiteHide

Localities for LuetheiteHide

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.
USA (TL)
 
  • Arizona
    • Santa Cruz Co.
      • Patagonia Mts
        • Harshaw District
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 281; Williams, S.A. (1977), Luetheite, Cu2Al2(AsO4)2(OH)4.H2O, a new mineral from Arizona compared with chenevixite, Mineralogical Magazine: 41: 27-42; Joe Ruiz, pers. comm. to Rolf Luetcke.
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 187.
[Nickel & Nichols, 1991 - "Mineral Reference Manual", p123; Mineralogical Magazine(1977) 41, 27-32]
  • Nevada
    • Pershing Co.
      • Antelope District
        • Majuba Hill Mine (Majuba Mine; Mylar Mine; Tin Mine; Nevada Bureau of Mines and Geology sample sites 2844 & 2846)
Jensen, M. (1993): Update on the mineralogy of the Majuba Hill mine, Pershing County. Mineralogical Record. 24, 171-180.
Mineral and/or Locality  
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