Paramontroseite
A valid IMA mineral species - grandfathered
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About Paramontroseite
Formula:
V4+O2
Colour:
Black to grayish black
Lustre:
Sub-Metallic
Specific Gravity:
4.09 (Calculated)
Crystal System:
Orthorhombic
Member of:
Name:
Named because in the type material, the mineral was found to form a paramorph after montroseite.
This page provides mineralogical data about Paramontroseite.
Unique Identifiers
Mindat ID:
3100
Long-form identifier:
mindat:1:1:3100:0
GUID
(UUID V4):
(UUID V4):
c11d303a-9847-409b-b733-9c34868c631d
IMA Classification of Paramontroseite
Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
VO2
Classification of Paramontroseite
4.DB.15a
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
D : Metal: Oxygen = 1:2 and similar
B : With medium-sized cations; chains of edge-sharing octahedra
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
D : Metal: Oxygen = 1:2 and similar
B : With medium-sized cations; chains of edge-sharing octahedra
4.4.11.1
4 : SIMPLE OXIDES
4 : AX2
4 : SIMPLE OXIDES
4 : AX2
7.12.3
7 : Oxides and Hydroxides
12 : Oxides of V, Nb and Ta
7 : Oxides and Hydroxides
12 : Oxides of V, Nb and Ta
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 |
|---|---|---|
| Pmto | 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 Paramontroseite
Sub-Metallic
Transparency:
Opaque
Colour:
Black to grayish black
Streak:
black
Comment:
Soft
Density:
4.09 g/cm3 (Calculated)
Optical Data of Paramontroseite
Type:
Biaxial
Chemistry of Paramontroseite
Mindat Formula:
V4+O2
Elements listed:
Chemical Analysis
Empirical formulas:
| Sample ID | Empirical Formula |
|---|---|
| 1 | V0.84Fe0.19Al0.03O2 |
Sample references:
Crystallography of Paramontroseite
Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Cell Parameters:
a = 4.9 Å, b = 9.42 Å, c = 2.91 Å
Ratio:
a:b:c = 0.52 : 1 : 0.309
Unit Cell V:
134.32 ų (Calculated from Unit Cell)
Comment:
Space Group: P bnm; cell data for Fe-bearing natural sample (Curetti & Pavese, 2023) is: a=4.8960(14), b=9.395(3), c=2.9163(5) Å; V=134.14(6) Å3
Crystal Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0000074 | Paramontroseite | Evans H T, Mrose M E (1955) A crystal chemical study of montroseite and paramontroseite. American Mineralogist 40 861-875 |  | 1955 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.39 Å | (100) |
| 2.645 Å | (50) |
| 4.35 Å | (35) |
| 2.213 Å | (35) |
| 1.426 Å | (35) |
| 2.479 Å | (25) |
| 2.179 Å | (25) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 47h : [Near-surface oxidized, dehydrated minerals] |
Type Occurrence of Paramontroseite
Place of Conservation of Type Material:
National Museum of Natural History, Washington, D.C., USA, 106897, 106898.
Geological Setting of Type Material:
pseudomorphs after montroseite crystals.
Associated Minerals at Type Locality:
Reference:
Evans, H.T., Mrose, M.E. (1955) A crystal study of montroseite and paramontroseite. American Mineralogist: 40: 861-875.
Other Language Names for Paramontroseite
Relationship of Paramontroseite to other Species
Member of:
Other Members of this group:
| Akhtenskite | ε-Mn4+O2 | Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc |
| Nsutite | (Mn4+,Mn2+)(O,OH)2 | Hex. |
| Ramsdellite | Mn4+O2 | Orth. mmm (2/m 2/m 2/m) |
Common Associates
Associated Minerals Based on Photo Data:
| 5 photos of Paramontroseite associated with Montroseite | (V3+,Fe3+)O(OH) |
| 2 photos of Paramontroseite associated with Pascoite | Ca2Ca(V10O28) · 17H2O |
| 2 photos of Paramontroseite associated with Corvusite | (Na,K,Ca,Mg)2(V5+,V4+,Fe2+)8O20 · 6-10H2O |
| 2 photos of Paramontroseite associated with Metarossite | Ca(V2O6) · 2H2O |
| 1 photo of Paramontroseite associated with Carnotite | K2(UO2)2(VO4)2 · 3H2O |
Related Minerals - Strunz-mindat Grouping
| 4.DB. | Nioboheftetjernite | ScNbO4 |
| 4.DB. | Shakhdaraite-(Y) | ScYNb2O8 |
| 4.DB. | Nioboixiolite-(Mn2+) | (Nb0.67Mn2+0.33)O2 |
| 4.DB. | Nioboixiolite-([]) | (Nb0.8◻0.2)4+O2 |
| 4.DB.05 | Argutite | GeO2 |
| 4.DB.05 | Cassiterite | SnO2 |
| 4.DB.05 | Plattnerite | PbO2 |
| 4.DB.05 | Pyrolusite | Mn4+O2 |
| 4.DB.05 | Rutile | TiO2 |
| 4.DB.05 | Tripuhyite | Fe3+Sb5+O4 |
| 4.DB.05 | Tugarinovite | MoO2 |
| 4.DB.05 | Varlamoffite | (Sn,Fe)(O,OH)2 |
| 4.DB.10 | Byströmite | MgSb2O6 |
| 4.DB.10 | Tapiolite-(Fe) | Fe2+Ta2O6 |
| 4.DB.10 | Tapiolite-(Mn) | Mn2+Ta2O6 |
| 4.DB.10 | Ordoñezite | ZnSb2O6 |
| 4.DB.10 | Tredouxite | NiSb2O6 |
| 4.DB.15b | Akhtenskite | ε-Mn4+O2 |
| 4.DB.15c | Nsutite | (Mn4+,Mn2+)(O,OH)2 |
| 4.DB.15a | Ramsdellite | Mn4+O2 |
| 4.DB.20 | Scrutinyite | α-PbO2 |
| 4.DB.25 | Ishikawaite | U4+Fe2+Nb2O8 |
| 4.DB.25 | Samarskite-(Y) | YFe3+Nb2O8 |
| 4.DB.25 | Srilankite | ZrTi2O6 |
| 4.DB.25 | Yttrocolumbite-(Y) | Y(U4+,Fe2+)Nb2O8 |
| 4.DB.25 | Calciosamarskite | (Ca,U4+)Fe3+(Nb,Ta,Ti)2O8 |
| 4.DB.25 | Samarskite-(Yb) | YbFe3+(Nb,Ta)2O8 |
| 4.DB.25 | Ixiolite-(Fe2+) | (Ta0.67Fe2+0.33)O2 |
| 4.DB.25 | Ixiolite-(Mn2+) | (Ta0.67Mn2+0.33)O2 |
| 4.DB.30 | Ferberite | FeWO4 |
| 4.DB.30 | Hübnerite | MnWO4 |
| 4.DB.30 | Sanmartinite | (Zn,Fe)WO4 |
| 4.DB.30 | Krasnoselskite | CoWO4 |
| 4.DB.30 | Heftetjernite | ScTaO4 |
| 4.DB.30 | Huanzalaite | MgWO4 |
| 4.DB.30 va | Wolframite Group | |
| 4.DB.30 | Rossovskyite | (Fe3+,Ta)(Nb,Ti)O4 |
| 4.DB.35 | Columbite-(Fe) | Fe2+Nb2O6 |
| 4.DB.35 | Tantalite-(Fe) | Fe2+Ta2O6 |
| 4.DB.35 | Columbite-(Mn) | Mn2+Nb2O6 |
| 4.DB.35 | Tantalite-(Mn) | Mn2+Ta2O6 |
| 4.DB.35 | Columbite-(Mg) | (Mg,Fe,Mn)(Nb,Ta)2O6 |
| 4.DB.35 | Qitianlingite | (Fe,Mn)2(Nb,Ta)2WO10 |
| 4.DB.35 | Tantalite-(Mg) | (Mg,Fe2+)(Ta,Nb)2O6 |
| 4.DB.35 | Tantalaeschynite-(Ce) | Ce(TiTa)O6 |
| 4.DB.40 | Ferrowodginite | Fe2+Sn4+Ta2O8 |
| 4.DB.40 | Lithiotantite | LiTa3O8 |
| 4.DB.40 | Lithiowodginite | LiTa3O8 |
| 4.DB.40 | Titanowodginite | Mn2+TiTa2O8 |
| 4.DB.40 | Wodginite | Mn2+Sn4+Ta2O8 |
| 4.DB.40 | Ferrotitanowodginite | Fe2+TiTa2O8 |
| 4.DB.40 | Tantalowodginite | (Mn2+0.5◻0.5)TaTa2O8 |
| 4.DB.40 | Wolframowodginite | Mn(Mn,Sn,Fe,Ta)(W,Ta,Nb)2O8 |
| 4.DB.45 | Tivanite | V3+TiO3(OH) |
| 4.DB.50 | Carmichaelite | (Ti,Cr,Fe)[O2-x(OH)x] |
| 4.DB.55 | Alumotantite | AlTaO4 |
| 4.DB.60 | Biehlite | ((Sb,As)O)2[MoO4] |
Other Information
Special Storage/
Display Requirements:
Display Requirements:
Rapidly transforms topotactically from montroseite in air.
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 Paramontroseite
mindat.org URL:
https://www.mindat.org/min-3100.html
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References for Paramontroseite
Reference List:
Evans, Howard T., Block, and Stanley (1953) The crystal structure of montroseite, a vanadium member of the diaspore group. American Mineralogist, 38 (11-12) 1242-1250
Localities for Paramontroseite
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.
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Monument No. 2 Mine, Monument No. 2 channel, Yazzie Mesa, Cane Valley Mining District, Apache County, Arizona, USA