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Sincosite

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Ross Hannibal Mine (North Star Mine; Hannibal Mine; and Mikado Mine), Lead District, Lawrence Co., South Dakota, USA
© Brent Thorne

Show Sincosite Photos (20)
Formula:
CaV
 
2
(PO
 
4
)
 
2
O
 
2
·5H
 
2
O
System:TetragonalColour:Grass-green, yellow- to ...
Hardness:1 - 2
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 Sincosite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:7/E.03-10
Nickel-Strunz 10th (pending) edition ID:8.CJ.65

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

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

19 : Phosphates
10 : Phosphates of Pb, Th, V and Bi
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Type Occurrence of Sincosite

Type Locality:Sincos, Junín, Cerro de Pasco, Daniel Alcides Carrión Province, Pasco Department, Peru
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.
Year of Discovery:1922
Geological Setting of type material:Veinlets in Cretaceous black carbonaceous shale
Associated Minerals at type locality:
Gypsum

Physical Properties of Sincosite

Lustre:Vitreous, Pearly, Sub-Metallic, Dull
Diaphaneity (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 (Mohs):1 - 2
Tenacity:Brittle
Cleavage:Perfect
On (001) perfect, on {110} good, on {010} poor.
Density (measured):2.84 - 2.98 g/cm3
Density (calculated):2.97 g/cm3
Comment:Actual value for measured density is ~2.84 to 2.98.

Crystallography of Sincosite

Crystal System:Tetragonal
Class (H-M):4/mmm (4/m 2/m 2/m) - Ditetragonal Dipyramidal
Space Group:P42/nnm (P42/n 2/n 2/m)
Cell Parameters:a = 8.895Å, c = 12.727Å
Ratio:a:c = 1 : 1.431
Unit Cell Volume: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.

Optical Data of Sincosite

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°
Maximum Birefringence:δ = 0.025

Chart 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 Sincosite

Formula:
CaV
 
2
(PO
 
4
)
 
2
O
 
2
·5H
 
2
O
Essential elements:Ca, H, O, P, V
All elements listed in formula:Ca, H, O, P, V
Analyical Data:Close chemical and structural analog of layered uranyl phosphates, but with [VO]2+ groups instead of [UO2]2+ groups.
Relationship of Sincosite to other Species
Common Associates:
Minyulite
Related Minerals - Nickel-Strunz Grouping):
8.CJ.05Stercorite
NaNH
 
4
HPO
 
4
·4H
 
2
O
8.CJ.10Mundrabillaite
(NH
 
4
)
 
2
Ca(HPO
 
4
)
 
2
·H
 
2
O
8.CJ.10Swaknoite
(NH
 
4
)
 
2
Ca[HPO
 
4
]
 
2
 · H
 
2
O
8.CJ.15Nabaphite
NaBaPO
 
4
·9H
 
2
O
8.CJ.15Nastrophite
Na(Sr,Ba)PO
 
4
·9H
 
2
O
8.CJ.20Haidingerite
Ca[HAsO
 
4
] · H
 
2
O
8.CJ.25Vladimirite
Ca
 
5
[(HAsO
 
4
)
 
2
|(AsO
 
4
)
 
2
] · 5H
 
2
O
8.CJ.30Ferrarisite
Ca
 
5
[(HAsO
 
4
)
 
2
|(AsO
 
4
)
 
2
] · 9H
 
2
O
8.CJ.30Guérinite
Ca
 
5
[(HAsO
 
4
)
 
2
|(AsO
 
4
)
 
2
] · 9H
 
2
O
8.CJ.35Machatschkiite
(Ca,Na)
 
6
AsO
 
4
(AsO
 
3
OH)
 
3
(PO
 
4
,SO
 
4
)·15H
 
2
O
8.CJ.40Phaunouxite
Ca
 
3
[AsO
 
4
]
 
2
 · 11H
 
2
O
8.CJ.40Rauenthalite
Ca
 
3
[AsO
 
4
]
 
2
 · 10H
 
2
O
8.CJ.45Brockite
(Ca,Th,Ce)(PO
 
4
)·H
 
2
O
8.CJ.45Grayite
(Th,Pb,Ca)PO
 
4
·H
 
2
O
8.CJ.45Ningyoite
CaU(PO
 
4
)
 
2
·1-2H
 
2
O
8.CJ.45Rhabdophane-(Ce)
(Ce,La)PO
 
4
·H
 
2
O
8.CJ.45Rhabdophane-(La)
(La,Ce)PO
 
4
·H
 
2
O
8.CJ.45Rhabdophane-(Nd)
(Nd,Ce,La)PO
 
4
·H
 
2
O
8.CJ.45Tristramite
(Ca,U,Fe)(PO
 
4
,SO
 
4
)·2H
 
2
O
8.CJ.45Smirnovskite
(Th,Ca)PO
 
4
 ·nH
 
2
O
8.CJ.50Ardealite
Ca
 
2
[HPO
 
4
|SO
 
4
] · 4H
 
2
O
8.CJ.50Brushite
CaHPO
 
4
·2H
 
2
O
8.CJ.50Churchite-(Y)
YPO
 
4
·2H
 
2
O
8.CJ.50Pharmacolite
CaHAsO
 
4
·2H
 
2
O
8.CJ.50Churchite-(Nd)
NdPO
 
4
·2H
 
2
O
8.CJ.55Mcnearite
NaCa
 
5
[(HAsO
 
4
)
 
4
|AsO
 
4
] · 4H
 
2
O
8.CJ.60Dorfmanite
Na
 
2
(PO
 
3
OH)·2H
 
2
O
8.CJ.65Bariosincosite
Ba(V
4+
 
O)
 
2
(PO
 
4
)
 
2
·4H
 
2
O
8.CJ.70Catalanoite
Na
 
2
[HPO
 
4
] · 8H
 
2
O
Related Minerals - Hey's Index Grouping:
19.10.1
Oxypyromorphite
Pb
 
10
(PO
 
4
)
 
6
O
19.10.2Plumbogummite
PbAl
 
3
[(OH)
 
5
|(PO
 
4
)
 
2
] · H
 
2
O
19.10.3Kamitugaite
AlPb(UO
 
2
)
 
5
[(OH)
 
9
|(PO
 
4
,AsO
 
4
)
 
2
] · 5H
 
2
O
19.10.5Drugmanite
Pb(Fe
3+
 
,Al)
 
2
[OH|PO
 
4
]
 
2
19.10.6Brabantite
CaTh(PO
 
4
)
 
2
19.10.8Grayite
(Th,Pb,Ca)PO
 
4
·H
 
2
O
19.10.9Brockite
(Ca,Th,Ce)(PO
 
4
)·H
 
2
O
19.10.11Ximengite
BiPO
 
4
19.10.12Paulkellerite
(BiO)
 
2
Fe
3+
 
[(OH)
 
2
|PO
 
4
]
Other Names for Sincosite
German names:
Sincosit
Spanish names:
Sincosita
Other Information
Other Information:Readily soluble in dilute acids to a blue solution. Insoluble in water.
Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
References for Sincosite
Reference List: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.
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    Localities for Sincosite
    
	






    


    

    
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    (TL) indicates type locality.  ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.

    Germany
     
    

    • Thuringia
    

      • Gera
    

        • Ronneburg U deposit
    
    		T. Witzke et al. (2001) American Mineralogist 86, 1081-1086
    Peru
     
    

    • Pasco Department
    

      • Daniel Alcides Carrión Province
    

        • Cerro de Pasco
    

          • Junín
    
    		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
    

    • Nevada
    

      • Eureka Co.
    

        • Lynn District
    

          • Elko
    
    		MinRecord 26:467
    



        • Maggie Creek District
    
    		MinRec 26(5):449-469.
    

    • 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
    
    		[MinRecord 30:203]
    

    


    

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