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Phosphofibrite

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About PhosphofibriteHide

Formula:
(H2O,K)3.5Fe8(PO4)6(OH)7 · 5H2O
Previously given as K<0.5(Fe3+,Cu)8(PO4)6(OH)7·7H2O.
Colour:
Yellow to yellowish green
Lustre:
Vitreous
Hardness:
4
Crystal System:
Monoclinic
Name:
Name for the composition (phosphate) and the fibrous habit.

Classification of PhosphofibriteHide

Approved
Approval Year:
1982
8.DJ.20

8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
J : With large and medium-sized cations, (OH, etc.):RO4 = 1:1
42.13.14.3

42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
13 : Miscellaneous
19.2.14

19 : Phosphates
2 : Phosphates of Cu

Physical Properties of PhosphofibriteHide

Vitreous
Transparency:
Translucent
Colour:
Yellow to yellowish green
Hardness:

Optical Data of PhosphofibriteHide

Type:
Biaxial (-)
RI values:
nα = 1.755 nγ = 1.790
Max Birefringence:
δ = 0.035
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
distinct to strong

Chemical Properties of PhosphofibriteHide

Formula:
(H2O,K)3.5Fe8(PO4)6(OH)7 · 5H2O

Previously given as K<0.5(Fe3+,Cu)8(PO4)6(OH)7·7H2O.
IMA Formula:
(H2O,K)3.5Fe3+8(PO4)6(OH)7 · 5H2O

Crystallography of PhosphofibriteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Cell Parameters:
a = 29.02 Å, b = 5.20 Å, c = 19.72 Å
β = 107.04°
Ratio:
a:b:c = 5.581 : 1 : 3.792
Unit Cell V:
2,845.19 ų (Calculated from Unit Cell)
Z:
4
Comment:
Space group C2/c; refined from powder diffraction film data; originally assumed to be orthorhombic, space group Pbmn or Pnmn.

Type Occurrence of PhosphofibriteHide

Synonyms of PhosphofibriteHide

Other Language Names for PhosphofibriteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
2 photos of Phosphofibrite associated with LeucophosphiteKFe3+2(PO4)2(OH) · 2H2O
2 photos of Phosphofibrite associated with ZinclipscombiteZnFe3+2(PO4)2(OH)2

Related Minerals - Nickel-Strunz GroupingHide

8.DJ.05JohnwalkiteK(Mn2+,Fe2+,Fe3+)2(Nb5+,Ta5+)(PO4)2O2 · 2(H2O,OH)Orth.
8.DJ.05OlmsteaditeKFe2+2(Nb5+,Ta5+)(PO4)2O2 · 2H2OOrth.
8.DJ.10GatumbaiteCaAl2(PO4)2(OH)2 · H2OMon. 2/m : P2/m
8.DJ.15CamgasiteCaMg(AsO4)(OH) · 5H2OMon. 2/m : P21/m
8.DJ.20Meurigite-KKFe3+8(PO4)6(OH)7 · 6.5H2OMon. 2/m : B2/b
8.DJ.20Meurigite-NaNaFe3+8(PO4)6(OH)7 · 6.5H2OMon. 2/m : B2/b
8.DJ.25JungiteCa2Zn4Fe3+8(PO4)9(OH)9 · 16H2OOrth.
8.DJ.30WycheproofiteNaAlZr(PO4)2(OH) · H2OTric.
8.DJ.35ErcititeNa2Mn3+2(PO4)2(OH)2 · 4H2OMon.
8.DJ.40MrázekiteBi2Cu3(PO4)2O2(OH)2 · H2OMon. 2/m
8.DJ.45AttikaiteCa3Cu2Al2(AsO4)4(OH)4 · 2H2OOrth. mmm (2/m 2/m 2/m) : Pban

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

42.13.14.1Meurigite-KKFe3+8(PO4)6(OH)7 · 6.5H2OMon. 2/m : B2/b
42.13.14.2Meurigite-NaNaFe3+8(PO4)6(OH)7 · 6.5H2OMon. 2/m : B2/b

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

19.2.1LibetheniteCu2(PO4)(OH)Orth. mmm (2/m 2/m 2/m) : Pnnm
19.2.2CornetiteCu3(PO4)(OH)3Orth. mmm (2/m 2/m 2/m) : Pbca
19.2.3ReichenbachiteCu5(PO4)2(OH)4Mon. 2/m
19.2.4LudjibaiteCu5(PO4)2(OH)4Tric. 1 : P1
19.2.5PseudomalachiteCu5(PO4)2(OH)4Mon. 2/m : P21/b
19.2.6NissoniteCu2Mg2(PO4)2(OH)2 · 5H2OMon.
19.2.7ZapataliteCu3Al4(PO4)3(OH)9 · 4H2OTet.
19.2.8TurquoiseCu(Al,Fe3+)6(PO4)4(OH)8 · 4H2OTric. 1 : P1
19.2.9SieleckiiteCu3Al4(PO4)2(OH)12 · 2H2OMon. 2/m : B2/m
19.2.10PlaneriteAl6(PO4)2(HPO4)2(OH)8 · 4 H2OTric. 1 : P1
19.2.11HentscheliteCuFe3+2(PO4)2(OH)2Mon.
19.2.13ChalcosideriteCuFe3+6(PO4)4(OH)8 · 4H2OTric. 1 : P1

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 PhosphofibriteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Walenta, K. & Dunn, P. J. (1984): Phosphofibrit, ein neues Eisenphosphat aus der Grube Clara im mittleren Schwarzwald (BRD). Chem. Erde, 43, 11-16. (in German).
American Mineralogist (1984): 69: 1192.
Kolitsch, U. (1999): Evidence for the identity of meurigite and phosphofibrite by transmission electron microscopy and X-ray powder diffraction. European Journal of Mineralogy: 11, Beih. no.1, 132.
Kampf, A. R., J.J. Pluth, & Y. Chen (2007): The crystal structure of meurigite. American Mineralogist 92, 1518-1524.
A. R. Kampf and U. Kolitsch (2008): The relationship between phosphofibrite and meurigite. M&M6, 6th Intern. Conf. on Mineralogy & Museums, Colorado School of Mines, Golden, Colorado, USA, September 7-9, 2008; Program and Abstract Volume, 26.
A. R. Kampf, P. M. Adams, U. Kolitsch and I. M. Steele (2009): Meurigite-Na, a new species, and the relationship between phosphofibrite and meurigite. Am. Mineral. 94, 720-727.

Internet Links for PhosphofibriteHide

Localities for PhosphofibriteHide

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.
Germany (TL)
 
  • Baden-Württemberg
    • Freiburg
      • Ortenaukreis
        • Oberwolfach
Chemie der Erde,(1984) 43, 11-16; Walenta, K. (1992): Die Mineralien des Schwarzwaldes. Chr. Weise Verlag, München, 336 pp. (in German); WALENTA, K. (1997): Neue Mineralfunde von der Grube Clara 7. Folge. - Lapis 22 (11), 37-47.
Spain
 
  • Extremadura
    • Badajoz
      • Oliva de Mérida
Calvo, M. (2015): Minerales y Minas de España. Vol. VII, Fosfatos, arseniatos y vanadatos. Escuela Técnica Superior de Ingenieros de Minas de Madrid - Fundación Gómez Pardo. 479 pp.
USA
 
  • Nevada
    • Eureka Co.
      • Carlin Trend
        • Maggie Creek Mining Subdistrict
NBMG Spec. Pub. 31 Minerals of Nevada
      • Lynn Mining District
        • Elko
Mineralogical Record 26:467
    • Humboldt Co.
      • Iron Point Mining District
        • Valmy
NBMG Spec. Pub. 31 Minerals of Nevada
  • New Mexico
    • Grant Co.
Northrup, Minerals of New Mexico, 3rd Rev. Ed., 1996
 
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