Sincosite (original) (raw)

A valid IMA mineral species - grandfathered

About SincositeHide

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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

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.

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:3671:5

cf6a8217-d55e-4760-b530-73d79381cfff

IMA Classification of SincositeHide

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Approved, 'Grandfathered' (first described prior to 1959)

IMA Formula:

Ca(VO)2(PO4)2 · 4H2O

Type description reference:

Classification of SincositeHide

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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

Mineral SymbolsHide

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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Physical Properties of SincositeHide

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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}.

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

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RI values:

_n_α = 1.670 - 1.675 _n_β = 1.690 _n_γ = 1.693 - 1.694 _n_ω = 1.680 _n_ε = 1.655

δ = 0.025

Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.

Comments:

E = X = Nearly colourless to pale yellow
O = Z = Grey-green

Comments:

Partially biaxial (-) if dehydrated.

Chemistry of SincositeHide

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Mindat Formula:

Ca(VO)2(PO4)2 · 5H2O

Crystallography of SincositeHide

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Polytype:

Formula:

Crystal System:

Class (H-M)

Space Group:

Space Group Setting:

Cell Parameters:

Ratio:

Unit Cell Volume (calc):

Z:

Crystal StructureHide

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X-Ray Powder DiffractionHide

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Powder Diffraction Data:

Geological EnvironmentHide

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Type Occurrence of SincositeHide

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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:

Reference:

Schaller, W.T. (1922) Sincosite, a new mineral. Journal of the Washington Academy of Sciences: 12: 195-195.

Other Language Names for SincositeHide

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Common AssociatesHide

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Associated Minerals Based on Photo Data:

Related Minerals - Strunz-mindat GroupingHide

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Other InformationHide

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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.

Internet Links for SincositeHide

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References for SincositeHide

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Reference List:

**Palache, Charles, Berman, Harry, Frondel, Clifford (1951) The System of Mineralogy (7th ed.) Vol. 2 - Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Ect. John Wiley and Sons, New York.**pp.1057-1058

Mumme, W.G., Grey, I.E., Gable, R.W., MacRae, C.M., Loomis, T. (2020) A first natural occurrence of triclinic sincosite, Ca(VO)2 PO4)2∙4H2O, from the South Rasmussen Ridge Mine, Idaho, USA. Neues Jahrbuch für Mineralogie-Abhandlungen: 261-268.

Localities for SincositeHide

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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

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- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and 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 (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.