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Petersite-(Y)

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About Petersite-(Y)Hide

Formula:
(Y,Ce,Nd)Cu6(PO4)3(OH)6 · 3H2O
Colour:
yellowish green
Lustre:
Vitreous
Hardness:
3 - 4
Specific Gravity:
3.41
Crystal System:
Hexagonal
Member of:
Name:
Named in honor of brothers Thomas A. Peters (1947-), curator of minerals at the Paterson, New Jersey museum and Joseph Peters (1951-), curator of minerals at the American Museum of Natural History, New York, in recognition of their contributions to the mineralogy of New Jersey and their curatorial work.

Classification of Petersite-(Y)Hide

Approved
Approval Year:
1981
First Published:
1982
8.DL.15

8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
L : With large and medium-sized cations, (OH, etc.):RO4 = 2:1
42.5.2.1

42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
5 : (AB)7(XO4)3Zq·xH2O
19.4.10

19 : Phosphates
4 : Phosphates of Ca

Pronounciation of Petersite-(Y)Hide

Pronounciation:
PlayRecorded byCountry
Jolyon & Katya RalphUnited Kingdom

Physical Properties of Petersite-(Y)Hide

Vitreous
Colour:
yellowish green
Streak:
white
Hardness:
3 - 4 on Mohs scale
Cleavage:
None Observed
Density:
3.41 g/cm3 (Measured)    3.40 g/cm3 (Calculated)

Optical Data of Petersite-(Y)Hide

Type:
Uniaxial (+)
RI values:
nω = 1.666 nε = 1.747
Max Birefringence:
δ = 0.081
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
High
Pleochroism:
Strong
Comments:
E > O, with E = green, O = light yellowish green

Chemical Properties of Petersite-(Y)Hide

Formula:
(Y,Ce,Nd)Cu6(PO4)3(OH)6 · 3H2O
IMA Formula:
Cu6Y(PO4)3(OH)6 · 3H2O

Crystallography of Petersite-(Y)Hide

Crystal System:
Hexagonal
Morphology:
Prism {10-10} and the pinacoid {0001}

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
11.6 (100)
4.36 (50)
3.49 (40)
2.877 (40)
2.509 (30)
2.433 (60)
1.961 (20)
1.745 (20)

Type Occurrence of Petersite-(Y)Hide

General Appearance of Type Material:
Euhedral crystals in isolated sprays to 0.1 mm.
Place of Conservation of Type Material:
Smithsonian Institution, Washington, D.C., USA, #NMNH 148973.
Geological Setting of Type Material:
Secondary mineralization in extensively brecciated hornfels, 30-60 m from contact with diabase stock.
Reference:
Peacor, D.R., Dunn, P.J. (1982) Petersite, a REE and phosphate analog of mixite. American Mineralogst: 67: 1039-1042.

Synonyms of Petersite-(Y)Hide

Other Language Names for Petersite-(Y)Hide

German:Petersit
Spanish:Petersita

Relationship of Petersite-(Y) to other SpeciesHide

Member of:
Other Members of this group:
Agardite-(Ce)CeCu6(AsO4)3(OH)6 · 3H2OHex. 6/m : P63/m
Agardite-(Dy)(Dy,La)Cu6(AsO4)3(OH)6 · 3H2OHex.
Agardite-(La)LaCu6(AsO4)3(OH)6 · 3H2OHex. 6/m
Agardite-(Nd)NdCu6(AsO4)3(OH)6 · 3H2OHex. 6/m : P63/m
Agardite-(Y)YCu6(AsO4)3(OH)6 · 3H2OHex. 6/m : P63/m
CalciopetersiteCaCu6(PO4)2(PO3OH)(OH)6 · 3H2OHex. 6/m : P63/m
GoudeyiteAlCu6(AsO4)3(OH)6 · 3H2OHex.
MixiteBiCu6(AsO4)3(OH)6 · 3H2OHex. 6/m : P63/m
Petersite-(Ce)Cu6Ce(PO4)3(OH)6·3H2OHex. 6/m : P63/m
Petersite-(La)Cu6La(PO4)3(OH)6 · 3H2OHex. 6/m : P63/m
Plumboagardite(Pb,REE,Ca)Cu6(AsO4)3(OH)6 · 3H2OHex. 6/m : P63/m
ZálesíiteCaCu6(AsO4)2(AsO3OH)(OH)6 · 3H2OHex.

Common AssociatesHide

Associated Minerals Based on Photo Data:
Chrysocolla1 photo of Petersite-(Y) associated with Chrysocolla on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

8.DL.05FoggiteCaAl(PO4)(OH)2 · H2OOrth.
8.DL.10CyriloviteNaFe3+3(PO4)2(OH)4 · 2H2OTet. 4 2 2 : P41 21 2
8.DL.10Millisite(Na,K)CaAl6(PO4)4(OH)9 · 3H2OTet.
8.DL.10WarditeNaAl3(PO4)2(OH)4 · 2H2OTet. 4 2 2 : P41 21 2
8.DL.15Agardite-(Nd)NdCu6(AsO4)3(OH)6 · 3H2OHex. 6/m : P63/m
8.DL.15Agardite-(Y)YCu6(AsO4)3(OH)6 · 3H2OHex. 6/m : P63/m
8.DL.15Agardite-(Ce)CeCu6(AsO4)3(OH)6 · 3H2OHex. 6/m : P63/m
8.DL.15Agardite-(La)LaCu6(AsO4)3(OH)6 · 3H2OHex. 6/m
8.DL.15GoudeyiteAlCu6(AsO4)3(OH)6 · 3H2OHex.
8.DL.15MixiteBiCu6(AsO4)3(OH)6 · 3H2OHex. 6/m : P63/m
8.DL.15ZálesíiteCaCu6(AsO4)2(AsO3OH)(OH)6 · 3H2OHex.
8.DL.15Plumboagardite(Pb,REE,Ca)Cu6(AsO4)3(OH)6 · 3H2OHex. 6/m : P63/m
8.DL.15CalciopetersiteCaCu6(PO4)2(PO3OH)(OH)6 · 3H2OHex. 6/m : P63/m
8.DL.20CheremnykhitePb3Zn3(VO4)2(TeO6)Orth.
8.DL.20DugganitePb3Zn3(AsO4)2(TeO6)Trig. 3 2 : P3 2 1
8.DL.20KuksitePb3Zn3(PO4)2(TeO6)Trig. 3 2 : P3 2 1
8.DL.20WallkilldelliteCa2Mn2+3(AsO4)2(OH)4 · 9H2OHex.
8.DL.20Wallkilldellite-(Fe)(Ca,Cu)4Fe2+6(AsO4,SiO4)4(OH,O)8 · 18H2OHex.
8.DL.25AngastoniteCaMgAl2(PO4)2(OH)4 · 7H2OTric. 1 : P1

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

19.4.1MonetiteCa(HPO4)Tric. 1
19.4.2HydroxylapatiteCa5(PO4)3(OH)Hex. 6/m : P63/m
19.4.3BrushiteCa(HPO4) · 2H2OMon. m : Bb
19.4.4IsoclasiteCa2(PO4)(OH) · 2H2OMon.
19.4.5BuchwalditeNaCa(PO4)Orth. mm2 : Pmn21
19.4.6CanaphiteNa2Ca(P2O7) · 4H2OMon.
19.4.7Mundrabillaite(NH4)2Ca(HPO4)2 · H2OMon. m : Pm
19.4.8WhitlockiteCa9Mg(PO4)6(HPO4)Trig. 3m : R3c
19.4.9BrianiteNa2CaMg(PO4)2Mon. 2/m : P21/b

Fluorescence of Petersite-(Y)Hide

None observed

Other InformationHide

Notes:
Soluble in 1:1 HCl acid.
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 Petersite-(Y)Hide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Peacor, D.R., Dunn, P.J. (1982) Petersite, a REE and phosphate analog of mixite. American Mineralogst: 67: 1039-1042.
Olmi, F., Sabelli, C., Trosti Ferroni, R. (1991) A contribution to the crystal chemistry of mixite group minerals from Sardinia (Italy). Neues Jahrbuch für Mineralogie, Monatshefte: 1991: 487-499.

Internet Links for Petersite-(Y)Hide

Localities for Petersite-(Y)Hide

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.
Czech Republic
 
  • Olomouc Region
    • Javorník (Jauernig)
Sejkora, J., Pauliš, P., Škoda, R.: Uranové ložisko Zálesí v Rychlebských horách. Minerál, 2007, roč. 15, č. 4, s. 305-238.
Germany
 
  • Baden-Württemberg
    • Black Forest
      • Gengenbach
        • Haigerach valley
Wittern,A. (1995) Mineralien finden im Schwarzwald
      • Schapbach
        • Wildschapbach valley
K. Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
  • Saxony
    • Erzgebirge
      • Clausnitz - Sayda District
        • Sayda
Wittern: "Mineralfundorte in Deutschland", 2001
Italy
 
  • Sardinia
    • Carbonia-Iglesias Province
      • Domusnovas
        • Oridda
Olmi, F., Sabelli, C., Trosti Ferroni, R. (1991): A contribution to the crystal chemistry of mixite group minerals from Sardinia (Italy). Neues Jahrbuch für Mineralogie - Monatshefte, 1991, 487-499
Japan
 
  • Honshu Island
    • Kinki Region
      • Shiga Prefecture
        • Konan City
          • Ishibe
Okamoto, A., Miyawaki, R. & Nakai, I. (1988): Petersite from the Haiyama quarry, Shiga Prefecture, Japan. Geoscience Magazine 37, 191-194.
South Africa
 
  • Gauteng Province
    • Pretoria District (Tshwane District)
Atanasova, M., Cairncross, B. and Windisch, W.R. (2016) Microminerals of the Bushveld Complex, South Africa. Popular Geoscience Series 6, Council for Geoscience, Pretoria, South Africa
USA
 
  • Arizona
    • Yavapai Co.
      • Black Hills (Black Hill Range)
RRUFF Project Specimen ID: R050541
  • New Jersey
    • Hudson Co.
      • Secaucus
Nick Facciola (finder); Peacor & Dunn, 1982 Am. Min. 67 (1982), 1039
Mineral and/or Locality  
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