Faustite
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About Faustite
Formula:
(Zn,Cu)Al6(PO4)4(OH)8 · 4H2O
Colour:
Apple-green
Lustre:
Sub-Vitreous, Waxy, Dull
Hardness:
5½
Specific Gravity:
2.92
Crystal System:
Triclinic
Member of:
Name:
Named by Richard C. Erd, M. D. Foster, and P. D. Procter, in honor of Dr. George Tobias Faust (August 27, 1908 Philadelphia, Pennsylvania, USA - February 27, 1985 Morristown, New Jersey, USA), mineralogist and petrologist with the U.S. Geological Survey. He served as president of the Mineralogical Society of America. He described/codescribed the new minerals huntite, pecoraite, and schoenfliesite.
Isostructural with:
Turquoise Group. The zinc analogue of Turquoise.
Visit gemdat.org for gemological information about Faustite.
Visit gemdat.org for gemological information about Faustite.
Classification of Faustite
Approved, 'Grandfathered' (first described prior to 1959)
First Published:
1953
7/D.15-50
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
8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
D : With only medium-sized cations, (OH, etc.):RO4= 2:1
42.9.3.3
42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
9 : (AB)7(XO4)4Zq·xH2O
42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
9 : (AB)7(XO4)4Zq·xH2O
19.6.10
19 : Phosphates
6 : Phosphates of Zn
19 : Phosphates
6 : Phosphates of Zn
Physical Properties of Faustite
Sub-Vitreous, Waxy, Dull
Transparency:
Translucent, Opaque
Colour:
Apple-green
Streak:
White to pale yellow-green
Hardness:
5½ on Mohs scale
Tenacity:
Brittle
Cleavage:
Poor/Indistinct
Fracture:
Conchoidal
Density:
2.92 g/cm3 (Measured) 2.99 g/cm3 (Calculated)
Optical Data of Faustite
Type:
Biaxial (+)
Dispersion:
weak
Chemical Properties of Faustite
Formula:
(Zn,Cu)Al6(PO4)4(OH)8 · 4H2O
IMA Formula:
ZnAl6(PO4)4(OH)8 · 4H2O
Crystallography of Faustite
Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Setting:
P1
Cell Parameters:
a = 7.44 Å, b = 9.89 Å, c = 7.67 Å
α = 107.75°, β = 115.65°, γ = 69.65°
α = 107.75°, β = 115.65°, γ = 69.65°
Ratio:
a:b:c = 0.752 : 1 : 0.776
Unit Cell V:
468.98 ų (Calculated from Unit Cell)
Z:
1
Morphology:
Fine grained massive, nuggets, veins.
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
6.70 | (70) |
6.14 | (70) |
3.68 | (100) |
3.44 | (60) |
3.28 | (60) |
2.92 | (60) |
2.89 | (80) |
2.05 | (70) |
Comments:
ICDD 6-216
Type Occurrence of Faustite
Reference:
Erd, R.C., Foster, M.D., Proctor, P.D. (1953) Faustite, a new mineral, the zinc analogue of turquois. American Mineralogist: 38: 964-972.
Other Language Names for Faustite
Varieties of Faustite
Cuprofaustite | A Cu-bearing faustite (turquoise group). Originally reported from Rhodope Mts, Bulgaria. |
Relationship of Faustite to other Species
Member of:
Other Members of this group:
Aheylite | (Fe2+,Zn)Al6(PO4)4(OH)8 · 4H2O | Tric. 1 : P1 |
Chalcosiderite | CuFe3+6(PO4)4(OH)8 · 4H2O | Tric. 1 : P1 |
Planerite | Al6(PO4)2(HPO4)2(OH)8 · 4 H2O | Tric. 1 : P1 |
Turquoise | Cu(Al,Fe3+)6(PO4)4(OH)8 · 4H2O | Tric. 1 : P1 |
UM1981-32-PO:FeH | Fe2+Fe3+6(PO4)4-x[PO3(OH)]x(OH)8·4H2O |
Common Associates
Associated Minerals Based on Photo Data:
Planerite | 9 photos of Faustite associated with Planerite on mindat.org. |
Siderite | 1 photo of Faustite associated with Siderite on mindat.org. |
Phosphophyllite | 1 photo of Faustite associated with Phosphophyllite on mindat.org. |
Quartz | 1 photo of Faustite associated with Quartz on mindat.org. |
Okenite | 1 photo of Faustite associated with Okenite on mindat.org. |
Related Minerals - Nickel-Strunz Grouping
8.DD.05 | Chenevixite | Cu2Fe3+2(AsO4)2(OH)4 | Mon. 2/m : P21/m |
8.DD.05 | Luetheite | Cu2Al2(AsO4)2(OH)4 | Mon. 2/m : P21/m |
8.DD.10 | Akrochordite | (Mn2+,Mg)5(AsO4)2(OH)4 · 4H2O | Mon. 2/m : P21/b |
8.DD.10 | Guanacoite | Cu2Mg3(AsO4)2(OH)4 · 4H2O | Mon. 2/m : P21/b |
8.DD.15 | Aheylite | (Fe2+,Zn)Al6(PO4)4(OH)8 · 4H2O | Tric. 1 : P1 |
8.DD.15 | Chalcosiderite | CuFe3+6(PO4)4(OH)8 · 4H2O | Tric. 1 : P1 |
8.DD.15 | Planerite | Al6(PO4)2(HPO4)2(OH)8 · 4 H2O | Tric. 1 : P1 |
8.DD.15 | Turquoise | Cu(Al,Fe3+)6(PO4)4(OH)8 · 4H2O | Tric. 1 : P1 |
8.DD.15 | Afmite | Al3(OH)4(H2O)3(PO4)(PO3OH) · H2O | Tric. 1 : P1 |
8.DD.20 | Childrenite | Fe2+Al(PO4)(OH)2 · H2O | Orth. mm2 : Ccc2 |
8.DD.20 | Eosphorite | Mn2+Al(PO4)(OH)2 · H2O | Orth. mmm (2/m 2/m 2/m) : Cmca |
8.DD.20 | Ernstite | (Mn2+,Fe3+)Al(PO4)(OH,O)2 · H2O | Mon. |
Related Minerals - Dana Grouping (8th Ed.)
42.9.3.1 | Turquoise | Cu(Al,Fe3+)6(PO4)4(OH)8 · 4H2O | Tric. 1 : P1 |
42.9.3.2 | Coeruleolactite | Tric. 1 : P1 | |
42.9.3.4 | Chalcosiderite | CuFe3+6(PO4)4(OH)8 · 4H2O | Tric. 1 : P1 |
42.9.3.5 | Aheylite | (Fe2+,Zn)Al6(PO4)4(OH)8 · 4H2O | Tric. 1 : P1 |
42.9.3.6 | Planerite | Al6(PO4)2(HPO4)2(OH)8 · 4 H2O | Tric. 1 : P1 |
42.9.3.6 | Afmite | Al3(OH)4(H2O)3(PO4)(PO3OH) · H2O | Tric. 1 : P1 |
Related Minerals - Hey's Chemical Index of Minerals Grouping
19.6.1 | Tarbuttite | Zn2(PO4)(OH) | Tric. 1 : P1 |
19.6.2 | Spencerite | Zn4(PO4)2(OH)2 · 3H2O | Mon. 2/m : P2/b |
19.6.3 | Hopeite | Zn3(PO4)2 · 4H2O | Orth. mmm (2/m 2/m 2/m) : Pnma |
19.6.4 | Parahopeite | Zn3(PO4)2 · 4H2O | Tric. 1 : P1 |
19.6.5 | Veszelyite | (Cu,Zn)2Zn(PO4)2 · 2H2O | Mon. 2/m : P21/b |
19.6.6 | Kipushite | (Cu,Zn)5Zn(PO4)2(OH)6 · H2O | Mon. |
19.6.7 | Scholzite | CaZn2(PO4)2 · 2H2O | Orth. mmm (2/m 2/m 2/m) : Pbcm |
19.6.8 | Parascholzite | CaZn2(PO4)2 · 2H2O | Mon. |
19.6.9 | Ehrleite | Ca4Be3Zn2(PO4)6 · 9H2O | Tric. 1 : P1 |
19.6.11 | Aheylite | (Fe2+,Zn)Al6(PO4)4(OH)8 · 4H2O | Tric. 1 : P1 |
19.6.12 | Jungite | Ca2Zn4Fe3+8(PO4)9(OH)9 · 16H2O | Orth. |
19.6.13 | Schoonerite | ZnMn2+Fe2+2Fe3+(PO4)3(OH)2 · 9H2O | Orth. mmm (2/m 2/m 2/m) : Pbam |
19.6.14 | Phosphophyllite | Zn2Fe(PO4)2 · 4H2O | Mon. 2/m : P21/b |
Fluorescence of Faustite
Not fluoescent
Other Information
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 Faustite
Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Erd, R.C., Foster, M.D., Proctor, P.D. (1953) Faustite, a new mineral, the zinc analogue of turquois. American Mineralogist: 38: 964-972.
Fleischer, M. (1954) New mineral names. American Mineralogist: 39: 402-408.
Kolitsch, U. and Giester, G. (2000) The crystal structure of faustite and its copper analogue turquoise. Mineralogical Magazine: 64: 905-913.
Rossi, M., Rizzi, R., Vergara, A., Capitelli, F., Altomare, A., Bellatreccia, F., Saviano, M., Ghiara, R.M. (2017) Compositional variation of turquoise-group minerals from the historical collection of the Real Museo Mineralogico of the University of Naples. Mineralogical Magazine: 81: 1405-1429.
Internet Links for Faustite
mindat.org URL:
https://www.mindat.org/min-1623.html
Please feel free to link to this page.
Please feel free to link to this page.
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Localities for Faustite
Locality List
- 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.
All localities listed without proper references should be considered as questionable.
Australia | |
| David Shannon |
| Australian Min. 3:1 (1997) |
| Minerals of Iron Monarch, Glyn L. Francis |
| W.D.Birch & D.A.Henry 1993. Phosphate Minerals of Victoria. The Mineralogical Society of Victoria special publication No. 3 pp 67-77 |
Belgium | |
| http://perso.infonie.be/jose.dehove/photos/Waimes.htm (ID by Prof. Van Tassel) |
Bolivia | |
| SEM analyses by Gene Foord, U.S. Geological Survey, done as part of an unpublished study of the turquoise group (analyses copies courtesy of Brian Kosnar) |
| Alfredo Petrov collection |
| Hyrsl, J. & A. Petrov (2006): Famous Mineral Localities: Llallagua, Bolivia. Mineralogical Record. 37: 117-162 |
Bulgaria | |
| [var: Cuprofaustite] Hikov, A., N. Velinova, S. Georgieva, A. Kunov (2011) Aluminium-phosphate-sulphate (APS) minerals in Bulgaria: characteristics and possibility for preservation. - In: V Intern. Symp. “Mineral Diversity Research and Preservation”, 9-15 October 2009, Sofia, Working papers, 37-48. |
| Kunov, A. & Mandova, E. (1997): Supergene minerals of the Obichnik Au-Ag deposit (Eastern Rhodopes). Spisanie na Bulgarskoto Geologichesko Druzhestvo 58, 19-24. (in Bulgarian) |
China | |
| Zhaoxin Han, Lijun Luan, and Chaoyou Wang (2004): Journal of Earth Sciences and Environment 26(2), 24-25 |
| Damao Wu and Yansong Tan (1981): Geology and Prospecting 17(9), 34-36 |
Germany | |
| Wittern: "Mineralfundorte in Deutschland", 2001 |
| Weiss: "Mineralienfundstellen, Deutschland West", Weise (Munich), 1990 |
| T. Witzke & T. Giesler (1997): Neufunde aus Sachsen (VI): Churchit-(Y), Cyrilovit, Faustit, Kidwellit, Meurigit und Nickelhexahydrit aus der Lausitz.- Lapis 22, 9, 36-38 |
Hungary | |
| |
Japan | |
| Matsuyama et al. (1996) Chigaku Kenkyu (Geoscience Magazine), 44, 183-186. |
UK | |
| Golley & Williams (1995): Cornish Mineral Reference Manual, p. 27 |
USA | |
| NBMG Spec. Pub. 31 Minerals of Nevada |
| Amer.Min.(1953) 38, 964-972 |
| NBMG Spec. Pub. 31 Minerals of Nevada |
| NBMG Spec. Pub. 31 Minerals of Nevada |
| NBMG Spec. Pub. 31 Minerals of Nevada |
| Collected by Gerry Austin, in the collection of Alex Earl |
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Warchenne quarry, Waimes, Malmédy, Liège, Wallonia, Belgium