Munirite
A valid IMA mineral species
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About Munirite
Dr. Munir Ahmad Khan
Formula:
NaVO3 · 1.9H2O
Colour:
Colourless; white, tinged apple-green
Lustre:
Pearly
Hardness:
1 - 2
Specific Gravity:
2.43
Crystal System:
Monoclinic
Name:
Named in 1983 by K.A. Butt and K. Mahmood in honor of Dr. Munir Ahmad Khan (20 May 1926, Kasur, Punjab, British India – 22 April 1999, Vienna, Austria), Chairman, Pakistan Atomic Energy Commission, who instituted the Mineral Research Laboratories in the Commission.
Type Locality:
Unique Identifiers
Mindat ID:
2810
Long-form identifier:
mindat:1:1:2810:9
Similar Names
| Muirite | A valid IMA mineral species | Ba10(Ca2Mn2+Ti)[Si8O24]O2Cl10 |
IMA Classification of Munirite
Approved
IMA Formula:
NaV5+O3(H2O)1.9
Approval year:
1982
First published:
1983
Classification of Munirite
4.HD.15
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
47.1.3.1
47 : VANADIUM OXYSALTS
1 : Normal Anhydrous Vanadium Oxysalts
47 : VANADIUM OXYSALTS
1 : Normal Anhydrous Vanadium Oxysalts
21.1.2
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 |
|---|---|---|
| Mni | 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 Munirite
Pearly
Transparency:
Translucent
Colour:
Colourless; white, tinged apple-green
Hardness:
1 - 2 on Mohs scale
Density:
2.43 g/cm3 (Measured) 2.44 g/cm3 (Calculated)
Optical Data of Munirite
Type:
Biaxial (-)
RI values:
nα = 1.692 nβ = 1.757 nγ = 1.800
2V:
Measured: 75° , Calculated: 74°
Max. Birefringence:
δ = 0.108
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. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
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. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
Surface Relief:
Very High (positive)
Relative to Canada balsam mounting medium (n ≈ 1.537).
Relative to Canada balsam mounting medium (n ≈ 1.537).
This shows the grain boundary and Becke line effect under plane-polarised
light, based on the contrast between this mineral's average refractive
index and the mounting medium. It does not take into account mineral
colouration.
In focus
Interference Figure:
This shows the idealized biaxial acute bisectrix (Bxa) interference figure
- the conoscopic view for a grain cut perpendicular to the acute bisectrix, using
this mineral's 2V. The two small white dots mark the melatopes - the points
where the two optic axes emerge - and are shown only when they fall within the
field of view. The coloured bands are isochromatics, and the dark bands are
isogyres.
Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.
Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.
Dispersion:
weak to distinct
Chemistry of Munirite
Mindat Formula:
NaVO3 · 1.9H2O
Element Weights:
Elements listed:
Crystallography of Munirite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Setting:
P21/a
Cell Parameters:
a = 16.72(2) Å, b = 3.636(3) Å, c = 8.015(6) Å
β = 111.0(1)°
β = 111.0(1)°
Ratio:
a:b:c = 4.598 : 1 : 2.204
Unit Cell V:
454.90 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Crystals, to 3 mm, in radiating to spherical fibrous aggregates
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
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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) |
|---|---|---|---|---|---|---|---|
| 0011948 | Munirite | Bjornberg A, Hedman B (1977) The crystal structure of NaVO3*1.89H2O Acta Chemica Scandinavica A31 579-584 | 1977 | synthetic | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 7.85 Å | (100) |
| 3.297 Å | (90) |
| 2.685 Å | (80) |
| 4.134 Å | (70) |
| 2.984 Å | (70) |
| 6.74 Å | (50) |
| 1.820 Å | (50) |
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] | |
| 47h : [Near-surface oxidized, dehydrated minerals] | |
| Stage 10b: Anthropogenic minerals | <10 Ka |
| 56 : Slag and smelter minerals (see also #51 and #55) |
Type Occurrence of Munirite
Place of Conservation of Type Material:
Hardrock Division, Atomic Energy Minerals Centre, Peshawar, Pakistan.
British Museum of Natural History.
British Museum of Natural History.
Synonyms of Munirite
Other Language Names for Munirite
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.20 | Metamunirite | NaVO3 |
| 4.HD.25 | Dickthomssenite | Mg(V2O6) · 7H2O |
| 4.HD.30 | Ansermetite | Mn2+(V2O6) · 4H2O |
Fluorescence of Munirite
None observed
Other Information
Notes:
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 Munirite
mindat.org URL:
https://www.mindat.org/min-2810.html
Please feel free to link to this page.
Please feel free to link to this page.
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Mineral Dealers:
References for Munirite
Reference List:
Dunn, Pete J., Fleischer, Michael, Francis, Carl A., Langley, Richard H., Kissin, Stephen A., Shigley, Hames E., Vanko, David A., Zilczer, Janet A. (1984) New mineral names. American Mineralogist, 69 (7-8) 810-815
Localities for Munirite
Showing 6 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.
Pakistan (TL) | |
| K.A. Butt (1983) |
South Africa | |
| Cairncross et al. (1998) |
USA | |
| Kampf et al. (2017) |
| Kampf et al. (2014) |
| Kampf et al. (2019) |
| Kampf et al. (2011) |
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Blue Streak Mine, Montrose County, Colorado, USA