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Pseudopomite
A valid IMA mineral species
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About Pseudopomite
Formula:
Ca3.5[V4+6V5+9O37(CO3)] · 29H2O
Colour:
very dark blue-green
Lustre:
Vitreous
Hardness:
2
Specific Gravity:
2.40
Crystal System:
Triclinic
Type Locality:
Closely related to pomite. The two are the first mineral species with carbonate-bearing heteropolyvanadate anions. Not a unique chemical combination (compare hanjiangite).
As pomite, the structure is based on [V4+xV5+15-xO37(CO3)](1+x)– heteropolyanion, which is novel among both natural and synthetic materials. Still, it has some similarities to [V4+8V5+7O36(CO3)]7– and [H8V4+15O36(CO3)]6– anions known in some synthetic materials.
As pomite, the structure is based on [V4+xV5+15-xO37(CO3)](1+x)– heteropolyanion, which is novel among both natural and synthetic materials. Still, it has some similarities to [V4+8V5+7O36(CO3)]7– and [H8V4+15O36(CO3)]6– anions known in some synthetic materials.
Unique Identifiers
Mindat ID:
55614
Long-form identifier:
mindat:1:1:55614:3
IMA Classification of Pseudopomite
Approved
IMA Formula:
Ca3.5[V4+6V5+9O37(CO3)]·32H2O
Approval year:
2021
Approval history:
IMA No. 2021-064
Classification of Pseudopomite
4.H0.
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
H : V[5,6] Vanadates
0 :
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
H : V[5,6] Vanadates
0 :
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 |
|---|---|---|
| Ppom | 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 Pseudopomite
Vitreous
Colour:
Very dark blue-green
Streak:
Blue-green
Hardness:
2 on Mohs scale
Comment:
ca.
Tenacity:
Brittle
Cleavage:
Imperfect/Fair
probable, on {100} and {001}
probable, on {100} and {001}
Fracture:
Irregular/Uneven
Density:
2.40(2) g/cm3 (Measured)
Chemistry of Pseudopomite
Mindat Formula:
Ca3.5[V4+6V5+9O37(CO3)] · 29H2O
Element Weights:
Crystallography of Pseudopomite
Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 12.291(2) Å, b = 12.620(1) Å, c = 20.917(3) Å
α = 77.381(6)°, β = 85.965(5)°, γ = 64.367(7)°
α = 77.381(6)°, β = 85.965(5)°, γ = 64.367(7)°
Ratio:
a:b:c = 0.974 : 1 : 1.657
Unit Cell V:
2,853.44 ų (Calculated from Unit Cell)
Z:
2
Comment:
structure determined
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 10.94 Å | (100) |
| 10.00 Å | (73) |
| 8.86 Å | (31) |
| 5.32 Å | (16) |
| 4.42 Å | (11) |
| 3.074 Å | (22) |
| 2.953 Å | (19) |
| 2.890 Å | (18) |
Type Occurrence of Pseudopomite
General Appearance of Type Material:
striated prisms and blades, up to ca. 1 mm in size
Place of Conservation of Type Material:
mineralogical collections of the Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, CA 90007, USA, catalogue no. 76155
Synonyms of Pseudopomite
Other Language Names for Pseudopomite
Dutch:Pseudopomiet
German:Pseudopomit
Related Minerals - Strunz-mindat Grouping
Other Information
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 Pseudopomite
mindat.org URL:
https://www.mindat.org/min-55614.html
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References for Pseudopomite
Reference List:
Miyawaki, Ritsuro, Hatert, Frédéric, Pasero, Marco, Mills, Stuart J. (2021) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) CNMNC Newsletter No 63. Mineralogical Magazine, 85 (6) 910-915 doi:10.1180/mgm.2021.74
Localities for Pseudopomite
Showing 1 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.
USA (TL) | |
| Miyawaki et al. (2021) +1 other reference |
Blue Streak Mine, Montrose County, Colorado, USA