Metamunirite
A valid IMA mineral species
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About Metamunirite
Formula:
NaVO3
Colour:
Colourless
Specific Gravity:
2.877
Crystal System:
Orthorhombic
Name:
Named for its probable relationship to munirite.
Type Locality:
Unique Identifiers
Mindat ID:
2680
Long-form identifier:
mindat:1:1:2680:8
IMA Classification of Metamunirite
Approved
IMA Formula:
NaV5+O3
First published:
1991
Classification of Metamunirite
4.HD.20
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
H : V[5,6] Vanadates
D : Inovanadates
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
H : V[5,6] Vanadates
D : Inovanadates
47.1.3.2
47 : VANADIUM OXYSALTS
1 : Normal Anhydrous Vanadium Oxysalts
47 : VANADIUM OXYSALTS
1 : Normal Anhydrous Vanadium Oxysalts
21.1.1
21 : Vanadates (and vanadates with arsenate or phosphate)
1 : Vanadates of the alkalis and Cu
21 : Vanadates (and vanadates with arsenate or phosphate)
1 : Vanadates of the alkalis and Cu
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 |
|---|---|---|
| Mmni | 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 Metamunirite
Transparency:
Translucent
Colour:
Colourless
Comment:
Hardness = Very soft
Tenacity:
Fragile
Cleavage:
Perfect
{101} and {001}
{101} and {001}
Density:
2.877 g/cm3 (Measured) 2.926 g/cm3 (Calculated)
Comment:
Measured is synthetic material
Optical Data of Metamunirite
Type:
Biaxial (+)
RI values:
nα = 1.780(2) nβ = 1.800(2) nγ = 1.85
2V:
Measured: 30° to 40°
Birefringence:
Note that the calculated and illustrated birefringence is a minimum, based on nγ = 1.85; because nγ is reportedly >> 1.85, the actual observed birefringence will be higher.
Max. Birefringence:
δ = 0.070
Based on recorded range of RI values above.
Based on recorded range of RI values above.
Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars.
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars.
Surface Relief:
Moderate
Dispersion:
r > v distinct
Optical Extinction:
X = c; Y = a; Z = b; positive elongation
Chemistry of Metamunirite
Mindat Formula:
NaVO3
Element Weights:
Elements listed:
Crystallography of Metamunirite
Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:
Pnma
Setting:
Pnma
Cell Parameters:
a = 14.134(7) Å, b = 3.648(2) Å, c = 5.357(2) Å
Ratio:
a:b:c = 3.874 : 1 : 1.468
Unit Cell V:
276.21 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Needle-like crystals, which sometimes are broadened into narrow laths. Dominant crystal habit is {101}, with no clearly developed terminal faces.
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) |
|---|---|---|---|---|---|---|---|
| 0009802 | Metamunirite | Kato K, Takayama E (1984) Das entwaesserungsverhalten des natriummetavanadatdihydrats und die kristallstruktur des beta-natriummetavanadats Acta Crystallographica B40 102-105 |  | 1984 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 5.05 Å | (100) |
| 2.957 Å | (35) |
| 3.530 Å | (25) |
| 3.241 Å | (18) |
| 3.016 Å | (13) |
| 2.685 Å | (12) |
| 7.07 Å | (11) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 47e : [Vanadates, chromates, manganates] | |
| 47h : [Near-surface oxidized, dehydrated minerals] | |
| Stage 10b: Anthropogenic minerals | <10 Ka |
| 55 : Anthropogenic mine minerals | |
| 56 : Slag and smelter minerals (see also #51 and #55) |
Type Occurrence of Metamunirite
General Appearance of Type Material:
Clusters of radiating colourless needles up to 0.2 mm in length in cavities in sandstone.
Place of Conservation of Type Material:
National Museum of Natural History, Washington, D.C., USA, 168386.
Geological Setting of Type Material:
sandstone vanadium deposit
Associated Minerals at Type Locality:
Synonyms of Metamunirite
Other Language Names for Metamunirite
Common Associates
Associations Based on Photo Data:
| 11 photos of Metamunirite associated with Pascoite Group | |
| 10 photos of Metamunirite associated with Bluestreakite | K4Mg2(V4+2V5+8O28) · 14H2O |
| 4 photos of Metamunirite associated with Schröckingerite | NaCa3(UO2)(CO3)3(SO4)F · 10H2O |
| 1 photo of Metamunirite associated with Corvusite | (Na,K,Ca,Mg)2(V5+,V4+,Fe2+)8O20 · 6-10H2O |
| 1 photo of Metamunirite associated with Zippeite | K3(UO2)4(SO4)2O3(OH) · 3H2O |
| 1 photo of Metamunirite associated with 'Sandstone' | |
| 1 photo of Metamunirite associated with Metarossite | Ca(V2O6) · 2H2O |
Related Minerals - Strunz-mindat Grouping
| 4.HD. | Pseudodickthomssenite | Mg(VO3)2 · 8H2O |
| 4.HD.05 | Rossite | Ca(VO3)2 · 4H2O |
| 4.HD.10 | Metarossite | Ca(V2O6) · 2H2O |
| 4.HD.15 | Munirite | NaVO3 · 1.9H2O |
| 4.HD.25 | Dickthomssenite | Mg(V2O6) · 7H2O |
| 4.HD.30 | Ansermetite | Mn2+(V2O6) · 4H2O |
Other Information
Notes:
Readily 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 Metamunirite
mindat.org URL:
https://www.mindat.org/min-2680.html
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References for Metamunirite
Reference List:
Kato, K., Takayama, E. (1984) Das Entwässerungsverhalten des Natriummetavanadatdihydrats und die Kristallstruktur des β-Natriummetavanadats. Acta Crystallographica Section B Structural Science, 40 (2) 102-105 doi:10.1107/s0108768184001828
Evans, Howard T. (1991) Metamunirite, a new anhydrous sodium metavanadate from San Miguel County, Colorado. Mineralogical Magazine, 55 (381) 509-513 doi:10.1180/minmag.1991.055.381.02
Localities for Metamunirite
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.
China | |
| www.mining120.com (2016) |
Greece | |
| Koshlyakova et al. (2016) |
Spain | |
| Joan Abella i Creus and Joan Viñals i Olià (2012) |
USA | |
| Färber (n.d.) |
| Kampf et al. (2014) |
| In the collection of Alex Earl | |
| Evans (1991) +2 other references |
| Evans (1991) +1 other reference | |
| Patrick Haynes communication (2004) |
| Michael Shannon collection |
| Färber (n.d.) |
| Collected by Michael Cline |
| Collection of Chris Clemens | |
| Collected and EDS analyzed by Joy Desor. |
| Patrick Haynes communication (2004) |
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Burro Mine, San Miguel County, Colorado, USA