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Montroseite Mineral Data
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General Montroseite Information
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 Chemical Formula: |
(V+++,Fe+++,V++++)O(OH) |
| Composition: |
Molecular Weight = 85.42 gm |
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Vanadium 41.75 % V 52.64 % V2O3 / 10.65 % V2O5 |
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Iron 19.61 % Fe 25.23 % FeO |
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Hydrogen 1.18 % H 10.55 % H2O |
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Oxygen 37.46 % O |
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______ ______ |
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100.00 % 99.06 % = TOTAL OXIDE |
| Empirical Formula: |
V3+0.6Fe2+0.3V5+0.1O(OH) |
| Environment: |
In relatively unoxidized Colorado Plateau-type U-V ores in sandstones. |
| IMA Status: |
Valid Species (Pre-IMA) 1953 |
| Locality: |
Bitter Creek, Jo Dandy, Whitney, and Virgin mines, Uravan district, Montrose County, Colorado, USA. Link to MinDat.org Location Data. |
| Name Origin: |
Named after the locality. |
| Name Pronunciation: |
Montroseite + Pronunciation  |
| Synonym: |
ICSD 22302 |
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PDF 11-152 |
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Montroseite Image |
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Images:
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Montroseite Crystallography
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| Axial Ratios: |
a:b:c =0.5084:1:0.309 |
| Cell Dimensions: |
a = 4.82, b = 9.48, c = 2.93, Z = 4; V = 133.88 Den(Calc)= 4.24 |
| Crystal System: |
Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pbnm |
| X Ray Diffraction: |
By Intensity(I/Io): 2.644(1), 4.31(1), 3.38(0.8), |
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Physical Properties of Montroseite
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| Cleavage: |
{010} Good, {110} Good |
| Color: |
Black, Grayish black. |
| Density: |
4 |
| Diaphaneity: |
Opaque |
| Fracture: |
Brittle - Generally displayed by glasses and most non-metallic minerals. |
| Habit: |
Bladed - Aggregates of thin lath-like crystals (e.g. kyanite). |
| Habit: |
Microscopic Crystals - Crystals visible only with microscopes. |
| Hardness: |
5.5-6.5 - Knife Blade-Pyrite |
| Luster: |
Sub Metallic |
| Streak: |
black |
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Optical Properties of Montroseite
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| Optical Data: |
Biaxial (?) |
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NCalc= 2.13 - from Gladstone-Dale relationship (KC = 0.2664) where Ncalc=Dcalc*KC+1
NCalc= 2.07 - from Gladstone-Dale relationship (KC = 0.2664) where Ncalc=Dmeas*KC+1
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| Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Montroseite in Air
| λ |
R1 |
R2 |
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∑ R1(λ) |
∑ R2(λ) |
| 400 nm |
16.60 |
18.70 |
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| 420 nm |
15.80 |
18.00 |
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| 440 nm |
15.00 |
17.30 |
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| 460 nm |
14.60 |
17.00 |
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| 480 nm |
14.40 |
16.80 |
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| 500 nm |
14.30 |
16.60 |
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| 520 nm |
14.40 |
16.70 |
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| 540 nm |
14.60 |
16.80 |
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| 560 nm |
14.90 |
16.90 |
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| 580 nm |
15.10 |
17.10 |
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| 600 nm |
15.50 |
17.40 |
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| 620 nm |
15.80 |
17.80 |
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| 640 nm |
16.20 |
18.20 |
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| 660 nm |
16.60 |
18.70 |
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| 680 nm |
17.00 |
19.20 |
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| 700 nm |
17.50 |
19.80 |
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Calculated Relative Intensity Colors of Montroseite in Air
Relative
Intensity |
0% |
60% |
100% |
120% |
180% |
240% |
300% |
360% |
420% |
480% |
540% |
600% |
| R1 |
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| R2 |
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Calculated Properties of Montroseite
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| Electron Density: |
Bulk Density (Electron Density)=4.06 gm/cc
note: Specific Gravity of Montroseite =4.24 gm/cc.
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| Fermion Index: |
Fermion Index = 0.0053833499
Boson Index = 0.9946166501 |
| Photoelectric: |
PEMontroseite = 13.95 barns/electron
U=PEMontroseite x rElectron Density= 56.64 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Montroseite is Not Radioactive |
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Montroseite Classification
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| Dana Class: |
06.01.01.04 (06)Hydroxides and Oxides Containing Hydroxyl |
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(06.01)where X+++O OH |
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(06.01.01)Diaspore group (Orthorhombic, Pnma or Pnmd) |
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06.01.01.01 Diaspore AlO(OH) Pbnm 2/m 2/m 2/m |
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06.01.01.02 Goethite FeO(OH) Pbnm 2/m 2/m 2/m |
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06.01.01.03 Groutite MnO(OH) Pbnm 2/m 2/m 2/m |
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06.01.01.04 Montroseite (V,Fe,V)O(OH) Pbnm 2/m 2/m 2/m |
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06.01.01.05 Bracewellite CrO(OH) Pbnm 2/m 2/m 2/m |
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06.01.01.06 Tsumgallite! GaO(OH) Pbnm 2/m 2/m 2/m |
| Strunz Class: |
04.FD.10 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate |
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04.F - Hydroxides (without V or U) |
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04.FD -Hydroxides with OH, without H2O; chains of edge-sharing octahedra |
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04.FD.10 Bracewellite CrO(OH) Pbnm 2/m 2/m 2/m |
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04.FD.10 Diaspore AlO(OH) Pbnm 2/m 2/m 2/m |
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04.FD.10 Guyanaite CrO(OH) Pnnm 2/m 2/m 2/m |
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04.FD.10 Groutite MnO(OH) Pbnm 2/m 2/m 2/m |
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04.FD.10 Goethite FeO(OH) Pbnm 2/m 2/m 2/m |
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04.FD.10 Montroseite (V,Fe,V)O(OH) Pbnm 2/m 2/m 2/m |
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04.FD.10 Tsumgallite! GaO(OH) Pbnm 2/m 2/m 2/m |
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Other Montroseite Information
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| References: |
NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic3) |
| See Also: |
Links to other databases for Montroseite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST
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Print or Cut-and-Paste your Montroseite Specimen Label here :
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Montroseite
(V+++,Fe+++,V++++)O(OH)
Dana No: 06.01.01.04 Strunz No: 04.FD.10
Locality:
Notes:
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