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.
Unique Identifiers
Mindat ID:
2680
Long-form identifier:
mindat:1:1:2680:8
GUID
(UUID V4):
(UUID V4):
92372424-2251-4d95-bf55-8db0a767f609
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 |
---|---|---|
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 = 1.850
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
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
Very High
Dispersion:
r > v distinct
Optical Extinction:
X = c; Y = a; Z = b; positive elongation
Chemistry of Metamunirite
Mindat Formula:
NaVO3
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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2x2x2 | 3x3x3 | 4x4x4
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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:
Reference:
Evans, H.T. (1991) Metamunirite, a new anhydrous sodium metavanadate from San Miguel County, Colorado. Mineralogical Magazine: 55: 509-513.
Synonyms of Metamunirite
Other Language Names for Metamunirite
Common Associates
Associated Minerals Based on Photo Data:
4 photos of Metamunirite associated with Schröckingerite | NaCa3(UO2)(CO3)3(SO4)F · 10H2O |
1 photo of Metamunirite associated with Zippeite | K3(UO2)4(SO4)2O3(OH) · 3H2O |
1 photo of Metamunirite associated with Corvusite | (Na,K,Ca,Mg)2(V5+,V4+,Fe2+)8O20 · 6-10H2O |
1 photo of Metamunirite associated with Pascoite Group | |
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
Localities for Metamunirite
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).
Struck out - Mineral was erroneously reported from this locality.
Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
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 |
| Patrick Haynes communication (2004) |
| Mineralogical Magazine (1991) +2 other references |
Mineralogical Magazine:55:509-513. +1 other reference | |
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, Slick Rock Mining District, San Miguel County, Colorado, USA