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Phosphovanadylite-Ca

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About Phosphovanadylite-CaHide

Formula:
Ca[V4+4P2O12(OH)4] · 12H2O
Colour:
bright greenish blue
Lustre:
Vitreous
Hardness:
2
Specific Gravity:
2.02
Crystal System:
Isometric
Name:
Ca analog of phosphovanadylite.
Ca analogue of phosphovanadylite-Ba.


Classification of Phosphovanadylite-CaHide

Approved
Approval Year:
2012
8.DM.20

8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
M : With large and medium-sized cations, (OH, etc.):RO4 > 2:1
42.13.15.2

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

Physical Properties of Phosphovanadylite-CaHide

Vitreous
Colour:
bright greenish blue
Comment:
On long-term exposure to sunlight, will gradually turn to green and then to black
Streak:
very pale greenish blue
Hardness:
Hardness Data:
Estimated
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Irregular/Uneven
Density:
2.02(3) g/cm3 (Measured)    2.038 g/cm3 (Calculated)

Optical Data of Phosphovanadylite-CaHide

Type:
Isotropic
RI values:
n = 1.559(2)
Birefringence:
Isotropic minerals have no birefringence
Surface Relief:
Low

Chemical Properties of Phosphovanadylite-CaHide

Formula:
Ca[V4+4P2O12(OH)4] · 12H2O
IMA Formula:
Ca[V4+4P2O12(OH)4] · 12H2O

Crystallography of Phosphovanadylite-CaHide

Crystal System:
Isometric
Class (H-M):
4 3m - Hextetrahedral
Space Group:
I4 3m
Setting:
I4 3m
Cell Parameters:
a = 15.441(11) Å
Unit Cell V:
3,681.51 ų (Calculated from Unit Cell)
Twinning:
interpenetration twins on {111}

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
11.04Å(97)
7.788Å(100)
4.487Å(14)
3.171Å(46)
2.749Å(32)
2.458Å(14)
2.343Å(15)
1.830Å(16)

Type Occurrence of Phosphovanadylite-CaHide

General Appearance of Type Material:
small cubes, intergrown into crusts.
Place of Conservation of Type Material:
Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, CA 90007, USA, catalogue numbers 63578, 63579, 63580, 63581 and 63582
Geological Setting of Type Material:
phosphorite beds
Associated Minerals at Type Locality:

Synonyms of Phosphovanadylite-CaHide

Common AssociatesHide

FluorapatiteCa5(PO4)3F
HydroxylapatiteCa5(PO4)3(OH)
PyriteFeS2
QuartzSiO2
SeleniumSe
SincositeCa(VO)2(PO4)2 · 5H2O
SphaleriteZnS
Associated Minerals Based on Photo Data:
9 photos of Phosphovanadylite-Ca associated with SincositeCa(VO)2(PO4)2 · 5H2O

Related Minerals - Nickel-Strunz GroupingHide

8.DM.Betpakdalite-CaMg[Ca2(H2O)17Mg(H2O)6][Mo8As2Fe3+3O36(OH)] Mon. 2/m : B2/m
8.DM.Betpakdalite-FeFe[Fe3+2 (H2O)15(OH)2Fe3+(H2O)6][Mo8As2Fe3+3 O37]Mon. 2/m : B2/m
8.DM.05MoriniteNaCa2Al2(PO4)2(OH)F4 · 2H2OMon. 2/m
8.DM.05EsperanzaiteNaCa2Al2(AsO4)2(OH)F4 · 2H2OMon.
8.DM.10TyroliteCa2Cu9(AsO4)4(CO3)(OH)8 · 11H2OMon. 2/m
8.DM.15Betpakdalite-CaCa[Ca2(H2O)17Ca(H2O)6][Mo6+8As5+2Fe3+3O36(OH)]Mon. 2/m : B2/m
8.DM.15Melkovite[Ca2(H2O)15Ca(H2O)6][Mo8P2Fe3+3O36(OH)]Mon. 2/m : B2/m
8.DM.15Betpakdalite-NaCa[Na2(H2O)17Ca(H2O)6][Mo6+8As5+2Fe3+3O34(OH)3]Mon. 2/m : B2/m
8.DM.20Phosphovanadylite-BaBa[V4+4P2O8(OH)8]·12H2OIso.
8.DM.25YukoniteCa3Fe3+(AsO4)2(OH)3 · 5H2OOrth. mm2
8.DM.30UdumineliteCa3Al8(PO4)2O12 · 2H2O
8.DM.35DelvauxiteCaFe4(PO4,SO4)2(OH)8 · 4-6H2O not confirmedAmor.
8.DM.40Santafeite(Na,Ca,Sr)12(Mn2+,Fe3+,Al,Mg)8Mn4+8(VO4)16(OH,O)20 · 8H2OOrth. mmm (2/m 2/m 2/m)

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

42.13.15.1Phosphovanadylite-BaBa[V4+4P2O8(OH)8]·12H2OIso.

Other InformationHide

Notes:
On long-term (about one year) exposure to sunlight, the mineral gradually turns from greenish blue to green and then black.

Dissolves slowly in cold, concentrated acids (HCl, H2SO4, and HNO3).
Special Storage/
Display Requirements:
Turns color on exposure to sunlight.
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 Phosphovanadylite-CaHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Kampf, A.R., Nash, B.P., Loomis, T.A. (2013) Phosphovanadylite-Ca, CaV4+4P2O8(OH)8 · 12H2O, the Ca analogue of phosphovanadylite-Ba. American Mineralogist 98, 439-441.
Am. Mineral. 98 (2013) 816. [Errata; the simplified formula is corrected]

Internet Links for Phosphovanadylite-CaHide

Localities for Phosphovanadylite-CaHide

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.
USA (TL)
 
  • Idaho
    • Caribou Co.
      • Soda Springs
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.
 
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