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Sincosite

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About SincositeHide

Formula:
Ca(VO)2(PO4)2 · 5H2O
Colour:
Grass-green, yellow- to olive-green, brownish green, blue-green; light green, olive-green, brownish green, yellowish green, bluish green in transmitted light.
Lustre:
Vitreous, Pearly, Sub-Metallic, Dull
Hardness:
1 - 2
Specific Gravity:
2.84 - 2.98
Crystal System:
Tetragonal
Name:
Named after its discovery locality at Sincos, Junín, Cerro de Pasco, Alcides Carrión Province, Pasco Department, Peru.
This page provides mineralogical data about Sincosite.


Classification of SincositeHide

Approved, 'Grandfathered' (first described prior to 1959)
8.CJ.65

8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
J : With only large cations
42.11.19.1

42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
11 : (AB)3(XO4)2Zq·xH2O
19.10.10

19 : Phosphates
10 : Phosphates of Pb, Th, V and Bi

Physical Properties of SincositeHide

Vitreous, Pearly, Sub-Metallic, Dull
Transparency:
Transparent, Translucent
Comment:
Lustre pearly on basal cleavage; submetallic if partially dehydrated
Colour:
Grass-green, yellow- to olive-green, brownish green, blue-green; light green, olive-green, brownish green, yellowish green, bluish green in transmitted light.
Comment:
Typically zoned parallel to {001}.
Streak:
Green
Hardness:
1 - 2 on Mohs scale
Tenacity:
Brittle
Cleavage:
Perfect
On (001) perfect, on {110} good, on {010} poor.
Density:
2.84 - 2.98 g/cm3 (Measured)    2.97 g/cm3 (Calculated)
Comment:
Actual value for measured density is ~2.84 to 2.98.

Optical Data of SincositeHide

Type:
Uniaxial (-)
RI values:
nα = 1.670 - 1.675 nβ = 1.690 nγ = 1.693 - 1.694 nω = 1.680 nε = 1.655
2V:
Measured: 10° to 83°
Max Birefringence:
δ = 0.025
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Pleochroism:
Visible
Comments:
E = X = Nearly colourless to pale yellow
O = Z = Grey-green
Comments:
Partially biaxial (-) if dehydrated.

Chemical Properties of SincositeHide

Formula:
Ca(VO)2(PO4)2 · 5H2O
IMA Formula:
Ca(VO)2(PO4)2 · 4H2O

Crystallography of SincositeHide

Crystal System:
Tetragonal
Class (H-M):
4/mmm (4/m 2/m 2/m) - Ditetragonal Dipyramidal
Space Group:
P42/nnm
Cell Parameters:
a = 8.895 Å, c = 12.727 Å
Ratio:
a:c = 1 : 1.431
Unit Cell V:
1,006.97 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Crystals thin tabular, square to rectangular, with {001}, {010}, and {110}; striated on {001} parallel [100] and [110]; may be composite with many superposed plates in nearly parallel position. Forms rosettes, crudely radial and in scaly aggregates; botryoidal to nodular massive.
Twinning:
On {110}, rare.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
6.35 (100)
3.190 (80)
3.511 (60)
2.682 (50)
2.907 (40)
2.100 (40)
3.841 (25)

Type Occurrence of SincositeHide

Place of Conservation of Type Material:
National School of Mines, Paris, France. Harvard University, Cambridge, Massachusetts, USA: #99139, 101699. U.S. National Museum of Natural History, Washington, D.C., USA: #95096.
Geological Setting of Type Material:
Veinlets in Cretaceous black carbonaceous shale
Associated Minerals at Type Locality:

Other Language Names for SincositeHide

German:Sincosit
Spanish:Sincosita

Common AssociatesHide

MinyuliteKAl2(PO4)2(OH,F) · 4H2O
Associated Minerals Based on Photo Data:
Minyulite14 photos of Sincosite associated with Minyulite on mindat.org.
Phosphovanadylite-Ca9 photos of Sincosite associated with Phosphovanadylite-Ca on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

8.CJ.CaesiumpharmacosideriteCsFe4[(AsO4)3(OH)4]·4H2OIso. 4 3m : P4 3m
8.CJ.05StercoriteNa(NH4)HPO4 · 4H2OTric.
8.CJ.10Mundrabillaite(NH4)2Ca(HPO4)2 · H2OMon. m : Pm
8.CJ.10Swaknoite(NH4)2Ca(HPO4)2 · H2OOrth.
8.CJ.15NabaphiteNaBaPO4 · 9H2OIso.
8.CJ.15NastrophiteNa(Sr,Ba)PO4 · 9H2O
8.CJ.20HaidingeriteCaHAsO4 · H2OOrth. mmm (2/m 2/m 2/m) : Pbcn
8.CJ.25VladimiriteCa4(AsO4)2(AsO3OH) · 4H2OMon. 2/m : P21/b
8.CJ.30FerrarisiteCa5(AsO4)2(HAsO4)2 · 9H2OTric. 1 : P1
8.CJ.35Machatschkiite(Ca,Na)6(AsO4)(HAsO4)3(PO4,SO4) · 15H2OHex.
8.CJ.40PhaunouxiteCa3(AsO4)2 · 11H2OTric.
8.CJ.40RauenthaliteCa3(AsO4)2 · 10H2OTric. 1 : P1
8.CJ.45Brockite(Ca,Th,Ce)PO4 · H2OHex. 6 2 2 : P62 2 2
8.CJ.45Grayite(Th,Pb,Ca)(PO4) · H2OHex. 6 2 2 : P62 2 2
8.CJ.45Rhabdophane-(Ce)Ce(PO4) · H2OHex. 6 2 2 : P62 2 2
8.CJ.45Rhabdophane-(La)La(PO4) · H2OHex. 6 2 2 : P62 2 2
8.CJ.45Rhabdophane-(Nd)Nd(PO4) · H2OHex. 6 2 2 : P62 2 2
8.CJ.45Tristramite(Ca,U,Fe)(PO4,SO4) · 2H2OHex.
8.CJ.45Smirnovskite(Th,Ca)PO4 · nH2OHex. 6 2 2 : P62 2 2
8.CJ.50ArdealiteCa2(HPO4)(SO4) · 4H2OMon. m : Bb
8.CJ.50BrushiteCa(HPO4) · 2H2OMon. m : Bb
8.CJ.50Churchite-(Y)Y(PO4) · 2H2OMon. 2/m : B2/b
8.CJ.50PharmacoliteCa(HAsO4) · 2H2OMon. m
8.CJ.50Churchite-(Nd)Nd(PO4) · 2H2OMon.
8.CJ.55McneariteNaCa5(AsO4)(HAsO4)4 · 4H2OTric.
8.CJ.60DorfmaniteNa2HPO4 · 2H2OOrth.
8.CJ.65BariosincositeBa(VO)2(PO4)2 · 4H2OTet.
8.CJ.70CatalanoiteNa2(HPO4) · 8H2OOrth. mmm (2/m 2/m 2/m) : Ibca
8.CJ.75GuériniteCa5(AsO4)2(HAsO4)2 · 9H2OMon. 2/m : P21/b
8.CJ.85NingyoiteCaU(PO4)2 · 1-2H2OOrth.

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

42.11.19.3CoralloiteMn2+Mn3+2(AsO4)2(OH)2 · 4H2OTric. 1 : P1

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

19.10.1OxypyromorphitePb10(PO4)6O
19.10.2PlumbogummitePbAl3(PO4)(PO3OH)(OH)6Trig. 3m (3 2/m) : R3m
19.10.3KamitugaitePbAl[(UO2)5(PO4)2.38(AsO4)0.62O2(OH)2] · 11.5H2OTric. 1 : P1
19.10.5DrugmanitePb2(Fe3+,Al)(PO4)(PO3OH)(OH)2Mon. 2/m : P21/b
19.10.6BrabantiteCaTh(PO4)2Mon.
19.10.8Grayite(Th,Pb,Ca)(PO4) · H2OHex. 6 2 2 : P62 2 2
19.10.9Brockite(Ca,Th,Ce)PO4 · H2OHex. 6 2 2 : P62 2 2
19.10.11XimengiteBi(PO4)Trig.
19.10.12Paulkellerite(BiO)2Fe3+(PO4)(OH)2Mon. 2/m : B2/b

Other InformationHide

Notes:
Readily soluble in dilute acids to a blue solution. Insoluble in water.
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 SincositeHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Schaller W.T. (1922), Journal of the Washington Acadamy of Sciences: 12: 195.
American Mineralogist (1922): 7: 163-164.
Schaller (1924) American Journal of Science: 8: 462.
Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged, 1124 pp.: 1057-1058.
Shitov, V.A., E.V. Prozorovskaya, I.G. Smyslova, and L.G. Kuznetsova (1984) Sincosite – rare vanadium phosphate. Zap. Vses. Mineral. Obshch., 113, 56–59 (in Russian).
Zolensky, M.E. (1985) New data on sincosite. American Mineralogist, 70, 409–410.
Inorganic Chemistry (1992): 31: 4743-4748.
Anthony, J.W., Bideaux, R.A., Bladh, K.W. and Nichols, M.C., Eds. Handbook of Mineralogy, Mineralogical Society of America, Chantilly, VA 20151-1110, USA. http://www.handbookofmineralogy.org/ (2016)

Internet Links for SincositeHide

Localities for SincositeHide

ⓘ - 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
 
  • Thuringia
    • Gera
      • Ronneburg U deposit
T. Witzke et al. (2001) American Mineralogist 86, 1081-1086
Peru (TL)
 
  • Junín department
    • Jauja province
      • Sincos district
Progr. Abstr., Min. Soc. Amer., 29th Annual Meeting (1948) p. 6; Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 1058; J.W. Anthony, R.A. Bideaux, K.W. Bladh, M.C. Nichols: Handbook of Mineralogy, Vol. IV (2000).
USA
 
  • Arkansas
    • Garland Co.
      • Wilson Springs (Potash Sulfur Springs)
        • Union Carbide Mine
R&M 70:3 pp 154-170
  • Idaho
    • Bear Lake Co.
R&M 70:4 pp 242-263
    • Caribou Co.
      • Soda Springs
Min Rec (1999) 30:399-405
Kampf, A. R., Nash,P., and Loomis, T.A. (2013): Phosphovanadylite-Ca, Ca[V#4#+^4P^2O^8(OH)^8.12H^2O, the Ca analogue of phosphovanadylite-Ba. American Mineralogist 98,439-443.
  • Nevada
    • Eureka Co.
      • Carlin Trend
        • Maggie Creek Subdistrict
MinRec 26(5):449-469.
      • Lynn District
        • Elko
Mineralogical Record 26:467
  • New Mexico
    • Cibola Co.
Northrop, Minerals of New Mexico, 3rd. rev. ed. (1996)
NMBMMR Memoir 15 Geology and Technology of the Grants Uranium Region
  • South Dakota
    • Lawrence Co.
      • Lead District
[Mineralogical Record 30:203]
Mineral and/or Locality  
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