Pintadoite
A valid IMA mineral species - grandfathered - questionable
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About Pintadoite
Formula:
Ca2(V2O7) · 9H2O
Colour:
Light to dark green
Name:
After the locality in the Pintado Canyon (Cañon Pintado), Utah, USA. Pronounced peen-ta'-do-ite.
A secondary mineral occurring as efflorescences on sandstone in protected outcrops.
Unique Identifiers
Mindat ID:
3218
Long-form identifier:
mindat:1:1:3218:2
IMA Classification of Pintadoite
Approved, 'Grandfathered' (first described prior to 1959), Questionable
IMA Formula:
Ca2V5+2O7·9H2O
First published:
1914
Classification of Pintadoite
8.FC.15
8 : PHOSPHATES, ARSENATES, VANADATES
F : Polyphosphates, Polyarsenates, [4]-Polyvanadates
C : Polyphosphates, etc., with H2O only
8 : PHOSPHATES, ARSENATES, VANADATES
F : Polyphosphates, Polyarsenates, [4]-Polyvanadates
C : Polyphosphates, etc., with H2O only
47.4.3.1
47 : VANADIUM OXYSALTS
4 : Vanadium Bronzes
47 : VANADIUM OXYSALTS
4 : Vanadium Bronzes
21.2.5
21 : Vanadates (and vanadates with arsenate or phosphate)
2 : Vanadates of Mg, Ca, Sr or Ba
21 : Vanadates (and vanadates with arsenate or phosphate)
2 : Vanadates of Mg, Ca, Sr or Ba
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Ptd | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Pintadoite
Transparency:
Translucent
Colour:
Light to dark green
Optical Data of Pintadoite
Type:
Uniaxial
Pleochroism:
Weak
Comments:
In yellow-greens.
Chemistry of Pintadoite
Mindat Formula:
Ca2(V2O7) · 9H2O
Element Weights:
Elements listed:
Crystallography of Pintadoite
Morphology:
Occurs as crusts and stains. Twinned, lathlike crystals result from solution after dissolved in water.
Comment:
No crystallographic data
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 47a : [Near-surface hydration of prior minerals] | |
| 47e : [Vanadates, chromates, manganates] |
Type Occurrence of Pintadoite
General Appearance of Type Material:
Efflorescences
Place of Conservation of Type Material:
Harvard University, Cambridge, Massachusetts, USA: #98962. U.S. National Museum of Natural History, Washington, D.C., USA: #R5714, 93657.
Geological Setting of Type Material:
McElmo Sandstone.
Associated Minerals at Type Locality:
Other Language Names for Pintadoite
Common Associates
Associations Based on Photo Data:
| 7 photos of Pintadoite associated with Fernandinite | (Ca,K)(V5+,V4+,Fe2+)8O20 · 10H2O |
Related Minerals - Strunz-mindat Grouping
| 8.FC. | Donowensite | Ca(H2O)3Fe3+2(V2O7)2 |
| 8.FC.X | Hylbrownite | Na3Mg(P3O10) · 12H2O |
| 8.FC.05 | Fianelite | Mn2+2((V,As)2O7) · 2H2O |
| 8.FC.05 | Rüdlingerite | Mn2+2V5+As5+O7 · 2H2O |
| 8.FC.10 | Canaphite | Na2Ca(P2O7) · 4H2O |
| 8.FC.20 | 'Arnhemite' | (K,Na)4Mg2(P2O7)2 · 5H2O |
| 8.FC.25 | Wooldridgeite | Na2CaCu2+2(P2O7)2 · 10H2O |
| 8.FC.30 | Kanonerovite | Na3Mn2+(P3O10) · 12H2O |
| 8.FC.35 | Mesaite | CaMn2+5(V2O7)3 · 12H2O |
Other Information
Notes:
Slowly soluble 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 Pintadoite
mindat.org URL:
https://www.mindat.org/min-3218.html
Please feel free to link to this page.
Please feel free to link to this page.
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References for Pintadoite
Reference List:
Localities for Pintadoite
Showing 15 localities.
symbol to view information about a locality.
The Locality List
- 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).
All localities listed without proper references should be considered as questionable.
Canada | |
| Currie (1980) |
USA | |
| Scarborough (1981) |
| Galbraith (1959) |
| Scarborough (1981) |
| Galbraith (1959) +1 other reference | |
| Galbraith (1959) +1 other reference | |
| Scarborough (1981) |
| Eckel et al. (1997) |
| Thorne (n.d.) |
| Palache et al. (1944) |
| Min News (1987) |
| Castor et al. (2004) |
| DANA R. KELLEY AND PAUL F. KERR (1958) |
| Observed on the ore pile |
| Hess et al. (1914) |
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Slick Rock Mining District, Colorado, USA