Montroseite
A valid IMA mineral species - grandfathered
This page is currently not sponsored. Click here to sponsor this page.
About Montroseite
Formula:
(V3+,Fe3+)O(OH)
Colour:
Black to grayish black
Lustre:
Sub-Metallic
Hardness:
5½ - 6½
Specific Gravity:
4.0
Crystal System:
Orthorhombic
Member of:
Name:
Named by A.D. Weeks, E.A. Cisney, and A.M. Sherwood in 1951 for Montrose County, Colorado, that includes the type locality.
Unique Identifiers
Mindat ID:
2769
Long-form identifier:
mindat:1:1:2769:0
IMA Classification of Montroseite
Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
(V3+,Fe2+,V4+)O(OH)
First published:
1951
Classification of Montroseite
4.FD.10
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
F : Hydroxides (without V or U)
D : Hydroxides with OH, without H2O; chains of edge-sharing octahedra
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
F : Hydroxides (without V or U)
D : Hydroxides with OH, without H2O; chains of edge-sharing octahedra
6.1.1.4
6 : HYDROXIDES AND OXIDES CONTAINING HYDROXYL
1 : XO(OH)
6 : HYDROXIDES AND OXIDES CONTAINING HYDROXYL
1 : XO(OH)
7.12.1
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 for Standard |
|---|---|---|
| Mto | 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 Montroseite
Sub-Metallic
Transparency:
Opaque
Colour:
Black to grayish black
Streak:
Black
Hardness:
5½ - 6½ on Mohs scale
Tenacity:
Brittle
Cleavage:
Distinct/Good
{010} and {110}, good.
{010} and {110}, good.
Density:
4.0 g/cm3 (Measured) 4.11 g/cm3 (Calculated)
Optical Data of Montroseite
Type:
Biaxial
Pleochroism:
Strong
Comments:
black and red
Chemistry of Montroseite
Mindat Formula:
(V3+,Fe3+)O(OH)
Elements listed:
Common Impurities:
Al
Crystallography of Montroseite
Crystal System:
Orthorhombic
Class (H-M):
mmm(2/m2/m2/m) - Dipyramidal
Cell Parameters:
a = 4.82 Å, b = 9.48 Å, c = 2.93 Å
Ratio:
a:b:c = 0.508 : 1 : 0.309
Unit Cell V:
133.88 ų (Calculated from Unit Cell)
Z:
4
Comment:
Space Group: P bnm.
Crystal Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Show
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Display Options
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
View
CIF File Best | x | y | z | a | b | c
CIF File Best | x | y | z | a | b | c
Rotation
Stop | Start
Stop | Start
Labels
Console Off | On | Grey | Yellow
Console Off | On | Grey | Yellow
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) |
|---|---|---|---|---|---|---|---|
| 0000073 | Montroseite | Evans H T, Mrose M E (1955) A crystal chemical study of montroseite and paramontroseite. American Mineralogist 40 861-875 |  | 1955 | 0 | 293 | |
| 0000062 | Montroseite | Evans H T, Block S (1953) The crystal structure of montroseite, a vanadium member of the diaspore group American Mineralogist 38 1242-1250 | | 1953 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 4.31 Å | (s) |
| 2.644 Å | (s) |
| 3.38 Å | (m) |
| 2.495 Å | (m) |
| 2.217 Å | (m) |
| 1.512 Å | (m) |
| 2.423 Å | (w) |
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] | |
| Stage 10a: Neoproterozoic oxygenation/terrestrial biosphere | <0.6 |
| 50 : Coal and/or oil shale minerals | <0.36 |
Type Occurrence of Montroseite
Place of Conservation of Type Material:
National Museum of Natural History, Washington, D.C., USA, 106897, 106898.
Other Language Names for Montroseite
Relationship of Montroseite to other Species
Member of:
Other Members of Diaspore Group:
| Bracewellite | CrO(OH) | Orth. mmm(2/m2/m2/m) |
| Diaspore | AlO(OH) | Orth. mmm(2/m2/m2/m) |
| Goethite | Fe3+O(OH) | Orth. mmm(2/m2/m2/m) : Pnma |
| Groutite | Mn3+O(OH) | Orth. mmm(2/m2/m2/m) : Pnma |
| Tsumgallite | GaO(OH) | Orth. mmm(2/m2/m2/m) |
Common Associates
Associations Based on Photo Data:
| 17 photos of Montroseite associated with Corvusite | (Na,K,Ca,Mg)2(V5+,V4+,Fe2+)8O20 · 6-10H2O |
| 9 photos of Montroseite associated with Pascoite | Ca2Ca(V10O28) · 17H2O |
| 5 photos of Montroseite associated with 'Sandstone' | |
| 5 photos of Montroseite associated with Paramontroseite | V4+O2 |
| 5 photos of Montroseite associated with Uraninite | UO2 |
| 4 photos of Montroseite associated with Calcite | CaCO3 |
| 3 photos of Montroseite associated with Metarossite | Ca(V2O6) · 2H2O |
| 3 photos of Montroseite associated with Rossite | Ca(VO3)2 · 4H2O |
| 3 photos of Montroseite associated with Gypsum | CaSO4 · 2H2O |
| 3 photos of Montroseite associated with Schindlerite | {(NH4)4Na2(H2O)10}{V10O28} |
Related Minerals - Strunz-mindat Grouping
| 4.FD.05 | Spertiniite | Cu(OH)2 |
| 4.FD.10 | Diaspore | AlO(OH) |
| 4.FD.10 | Goethite | Fe3+O(OH) |
| 4.FD.10 | Tsumgallite | GaO(OH) |
| 4.FD.10 | Groutite | Mn3+O(OH) |
| 4.FD.10 | Bracewellite | CrO(OH) |
| 4.FD.10 | Guyanaite | CrO(OH) |
| 4.FD.15 | Manganite | Mn3+O(OH) |
| 4.FD.20 | Yttrotungstite-(Y) | YW2O7(OH) · H2O |
| 4.FD.20 | Yttrotungstite-(Ce) | CeW2O7(OH) · H2O |
| 4.FD.25 | Frankhawthorneite | Cu2Te6+O4(OH)2 |
| 4.FD.30 | 'Khinite-3T' | Pb2+Cu2+3Te6+O6(OH)2 |
| 4.FD.30 | Housleyite | Pb6CuTe6+4O18(OH)2 |
| 4.FD.30 | Khinite | Pb2+Cu2+3[Te6+O6](OH)2 |
Other Information
Special Storage/
Display Requirements:
Display Requirements:
Rapidly transforms topotactically to paramontroseite 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 Montroseite
mindat.org URL:
https://www.mindat.org/min-2769.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
External Links:
Mineral Dealers:
References for Montroseite
Reference List:
Hurlbut, C. S. Jr. (1951) Proceedings of the thirty-first annual meeting of the Mineralogical Society of America at Washington, D. C. American Mineralogist, 36 (3-4) 304-328 pp.326-327
Weeks, Alice D., Cisney, Evelyn A., Sherwood, and Alexander M. (1953) Montroseite, a new vanadium oxide from the Colorado Plateaus. American Mineralogist, 38 (11-12) 1235-1241
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 Montroseite
Showing 165 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.
Quick NavTopAbout MontroseiteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography Crystal StructureX-Ray Powder DiffractionGeological EnvironmentType Occurrence Other LanguagesRelationshipsCommon AssociatesStrunz-MindatOther InformationInternet Links References Localities Locality List
Uranium Mine No. 21, Dubno, Příbram District, Central Bohemian Region, Czech Republic