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Calciodelrioite

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Formula:
Ca(VO3)2·4H2O
Stabilised by minor amounts of Sr.
System:
Monoclinic
Colour:
Colourless, tan to ...
Hardness:
Name:
As the new mineral is the Ca analogue of delrioite, it is named calciodelrioite.
Dimorph of:
Ca-dominant analogue of delrioite.
Calciodelrioite is dimorphous with rossite.

Classification of Calciodelrioite

Approved 2012
4.HG.

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
H : V[5,6] Vanadates
G : Unclassified V oxides
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http://www.mindat.org/min-43345.html
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Type Occurrence of Calciodelrioite

General Appearance of Type Material:
On fracture surfaces in corvusite- and montroseite-impregnated sandstone and forms as a result of the oxidative alteration of these phases
Place of Conservation of Type Material:
Natural History Museum of Los Angeles County, Los Angeles, CA 90007, USA, catalogue numbers 63837, 63838 and 63839.
Geological Setting of Type Material:
Uranium-vanadium sandstone deposits

Physical Properties of Calciodelrioite

Sub-Adamantine
Diaphaneity (Transparency):
Transparent
Colour:
Colourless, tan to brown, nearly black
Streak:
White
Hardness (Mohs):
Tenacity:
Brittle
Cleavage:
Perfect
on {001} and possibly one or more additional cleavages parallel to [100].
Fracture:
Irregular/Uneven, Splintery
Density:
2.451 g/cm3 (Calculated)

Crystallography of Calciodelrioite

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/b
Space Group Setting:
C2/c
Cell Parameters:
a = 14.6389(10) Å, b = 6.9591(4) Å, c = 17.052(2) Å
β = 102.568(9)°
Ratio:
a:b:c = 2.104 : 1 : 2.45
Unit Cell Volume:
V 1695.5 ų
Z:
8
Morphology:
Needles, bundles of needles and star bursts of broad blades composed of tightly intergrown needles. Crystals are elongate and striated parallel to <100>, exhibiting the prismatic forms {001} and {011} and having terminations possibly composed of the forms {100} and {61-1}.
Comment:
I2/a
X-Ray Powder Diffraction Data:
d-spacingIntensity
7.18(14)
6.450(100)
4.350(16)
3.489(18)
3.215(17)
3.027(50)
2.560(28)
1.786(18)

Optical Data of Calciodelrioite

Type:
Biaxial (-)
RI values:
nα = 1.733(3) nβ = 1.775(3) nγ = 1.825(3)
2V:
Measured: 87.3° , Calculated: 87°
Max Birefringence:
δ = 0.092
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Very High
Pleochroism:
Non-pleochroic

Chemical Properties of Calciodelrioite

Formula:
Ca(VO3)2·4H2O

Stabilised by minor amounts of Sr.
All elements listed in formula:
Analytical Data:
Electron-microprobe analyses of two samples, resulting in two empirical formulas (from type description)
Empirical Formula:
(Ca0.88Sr0.07Na0.04K0.011.00(V1.00O3)2(H2.01O)and (Ca0.76Sr0.21Na0.010.98(V1.00O3)2(H2.01O)44

Relationship of Calciodelrioite to other Species

4.HG.05FervaniteFe43+V45+O16 · 5H2O
4.HG.10HuemuliteNa4Mg(V10O28) · 24H2O
4.HG.15VanaliteNaAl8V10O38 · 30H2O
4.HG.20SimplotiteCaV44+O9 · 5H2O
4.HG.25VanoxiteV44+V25+O13 · 8H2O
4.HG.30NavajoiteFe3+V95+O24 · 12H2O
4.HG.35DelrioiteCaSr(V2O6)(OH)2 · 3H2O
4.HG.40MetadelrioiteCaSr(V2O6)(OH)2
4.HG.45Barnesite(Na,Ca)V6O16 · 3H2O
4.HG.50Hendersonite(Ca,Sr)1.3V6O16 · 6H2O
4.HG.55Grantsite(Na,Ca)2+x(V5+,V4+)6O16 · 4H2O
4.HG.60LenobliteV24+O4 · 2H2O
4.HG.65SatpaeviteAl12V24+V65+O37 · 30H2O

Other Names for Calciodelrioite

Name in Other Languages:

Other Information

Other Information:
Soluble in water
Special Storage/
Display Requirements:
Although calciodelrioite has a structure that is very similar to rossite, with which it is commonly associated, rossite is almost always partly to completely altered to the lower hydrate, metarossite, whereas calciodelrioite exhibits no evidence of such alteration.
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 Calciodelrioite

Reference List:
Kampf, A.R., Marty, J., Nash, B.,Plášil, J., Kasatkin, A.V. and Škoda, R. (2012): Calciodelrioite, IMA 2012-031. CNMNC Newsletter No. 14, October 2012, page 1285; Mineralogical Magazine, 76, 1281-1288

Kampf, A.R., Marty, J., Nash, B.P., Plášil, J., Kasatkin, A.V., Škoda, R. (2012): Calciodelrioite, Ca(VO3)2(H2O)4, the Ca analogue of delrioite, Sr(VO3)2(H2O)4. Mineralogical Magazine, 76, 2803-2817.

Internet Links for Calciodelrioite

Localities for Calciodelrioite

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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.
USA
 
  • Colorado
    • Montrose Co.
      • Bull Canyon District
Kampf, A.R., Hughes, J.M., Marty, J., Nash, B.P., Chen, Yu-S., Steele, I.M. (2014) Bluestreakite, K4Mg2(V4+2V5+8O28)·14H2O, a new mixed-valence decavanadate mineral from the Bluestreak Mine, Montrose County, Colorado: crystal structure and descriptive mineralogy. Canadian Mineralogist. 52:1007-1018; Kampf, A. R., Marty, J., Nash, B. P., Plášil, J., Kasatkin, A. V., & Škoda, R. (2012). Calciodelrioite, Ca (VO3) 2 (H2O) 4, the Ca analogue of delrioite, Sr (VO3) 2 (H2O) 4. Mineralogical Magazine, 76(7), 2803-2817.
    • San Miguel Co.
      • Slick Rock District
        • Gypsum Valley
Kampf, A.R., Hughes, J.M., Marty, J. & Nash, B. (2013) Wernerbaurite {[Ca(H2O)7]2(H2O)2(H3O)2}{V10O28}, and schindlerite, {[Na2(H2O)10](H3O)4}{V10O28}, the first hydronium-bearing decavanadate minerals. Canadian Mineralogist: 51: 297-312.
Kampf, A.R., Marty, J., Nash, B.,Plášil, J., Kasatkin, A.V. and Škoda, R. (2012): Calciodelrioite, IMA 2012-031. CNMNC Newsletter No. 14, October 2012, page 1285; Mineralogical Magazine, 76, 1281-1288
  • Utah
    • Grand Co.
      • Yellow Cat District (W. part of Thompsons District)
Kasatkin, A.V., Plášil, J., Marty, J., Belakovskiy, D.I., Lykova, I.S. (2014): Nestolaite, CaSeO3·H2O, a new mineral from the Little Eva mine, Grand County, Utah, USA. Mineralogical Magazine, 78, 497-505.
Mineral and/or Locality  
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