Molybdomenite
A valid IMA mineral species - grandfathered
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About Molybdomenite
Formula:
PbSeO3
Colour:
Colorless to white, yellowish white.
Lustre:
Adamantine, Greasy, Pearly
Hardness:
3½
Specific Gravity:
7.07
Crystal System:
Monoclinic
Name:
From the Greek μόλυβδος for "lead" and μήυη for "moon", where the element selenium is named for the moon.
Type Locality:
Dimorph of:
Unique Identifiers
Mindat ID:
2733
Long-form identifier:
mindat:1:1:2733:1
GUID
(UUID V4):
(UUID V4):
b0e5fba6-55ca-4955-a93b-6e8b4b123e75
IMA Classification of Molybdomenite
Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
PbSe4+O3
Classification of Molybdomenite
4.JF.05
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
J : Arsenites, antimonites, bismuthites, sulfites, selenites, tellurites; iodates
F : Selenites without additional anions, without H2O
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
J : Arsenites, antimonites, bismuthites, sulfites, selenites, tellurites; iodates
F : Selenites without additional anions, without H2O
Dana 7th ed.:
34.1.1.1
34.1.1.1
34 : SELENITES, TELLURITES AND SULFITES
1 : A(XO3)
34 : SELENITES, TELLURITES AND SULFITES
1 : A(XO3)
28.1.5
28 : Selenites, Selenates, Tellurites, and Tellurates
1 : Selenites
28 : Selenites, Selenates, Tellurites, and Tellurates
1 : Selenites
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 |
---|---|---|
Mdm | 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 Molybdomenite
Adamantine, Greasy, Pearly
Transparency:
Transparent
Colour:
Colorless to white, yellowish white.
Hardness:
3½ on Mohs scale
Cleavage:
Distinct/Good
On {001} and {h0l}, good.
On {001} and {h0l}, good.
Density:
7.07 g/cm3 (Measured) 7.12 g/cm3 (Calculated)
Optical Data of Molybdomenite
Type:
Biaxial (-)
RI values:
nα = 2.120 nγ = 2.140
2V:
Measured: 80°
Max Birefringence:
δ = 0.020
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:
Moderate
Dispersion:
r < v
Chemistry of Molybdomenite
Mindat Formula:
PbSeO3
Elements listed:
Crystallography of Molybdomenite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/m
Setting:
P21/m
Cell Parameters:
a = 6.91 Å, b = 5.48 Å, c = 4.51 Å
β = 112.75°
β = 112.75°
Ratio:
a:b:c = 1.261 : 1 : 0.823
Unit Cell V:
157.49 ų (Calculated from Unit Cell)
Z:
2
Morphology:
bladed, tabular, to 2 mm, thin scaly, less commonly in needles, may be as crusts.
Crystal Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
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) |
---|---|---|---|---|---|---|---|
0014923 | Molybdomenite | Pasero M, Rotiroti N (2003) The crystal structure of molybdomenite, PbSeO3 Neues Jahrbuch fur Mineralogie, Monatshefte 2003 145-152 | 2003 | El Dragon mine, Potosi, Bolivia | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
2.756 Å | (10) |
3.32 Å | (9) |
3.43 Å | (7) |
3.17 Å | (7) |
4.15 Å | (6) |
2.090 Å | (6b) |
2.99 Å | (5) |
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 7: Great Oxidation Event | <2.4 |
47d : [Arsenates, antimonates, selenates, bismuthinates] | |
47h : [Near-surface oxidized, dehydrated minerals] |
Type Occurrence of Molybdomenite
Place of Conservation of Type Material:
Natural History Museum, Paris, France, 98293.
Geological Setting of Type Material:
oxidized zone of selenium-bearing hydrothermal base metal
deposits.
Associated Minerals at Type Locality:
Reference:
Bertrand E (1882) Sur la molybdoménite (sélénite de plomb), la cobaltoménite (sélénite de cobalt) et l´acide sélénieux de Cacheuta (La Plata). Bulletin de la Société Minéralogique de France 5, 90-92
Synonyms of Molybdomenite
Lead selenate (in part)
Other Language Names for Molybdomenite
French:Selenite de plomb
Russian:Молибдоменит
Simplified Chinese:白硒铅矿
Spanish:Molybdomenita
Traditional Chinese:白硒鉛礦
Common Associates
Associated Minerals Based on Photo Data:
11 photos of Molybdomenite associated with Krut'aite | CuSe2 |
8 photos of Molybdomenite associated with Chalcomenite | CuSeO3 · 2H2O |
6 photos of Molybdomenite associated with Olsacherite | Pb2(Se6+O4)(SO4) |
5 photos of Molybdomenite associated with Goethite | α-Fe3+O(OH) |
4 photos of Molybdomenite associated with Petříčekite | CuSe2 |
4 photos of Molybdomenite associated with Selenium | Se |
3 photos of Molybdomenite associated with Clausthalite | PbSe |
3 photos of Molybdomenite associated with Klockmannite | CuSe |
2 photos of Molybdomenite associated with Ahlfeldite | Ni(SeO3) · 2H2O |
1 photo of Molybdomenite associated with Malachite | Cu2(CO3)(OH)2 |
Related Minerals - Strunz-mindat Grouping
4.JF. | Paramolybdomenite | PbSeO3 |
Other Information
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 Molybdomenite
mindat.org URL:
https://www.mindat.org/min-2733.html
Please feel free to link to this page.
Please feel free to link to this page.
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References for Molybdomenite
Reference List:
Localities for Molybdomenite
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.
Argentina | |
| Paar et al. (2004) |
Marquez-Zavalia et al. (2021) | |
Recursos Minerales de la Republica ... +3 other references | |
| Sarp et al. (1987) |
| Grundmann et al. (2018) |
| Ahlfeld Friedrich and Angelelll ... +3 other references |
Bolivia | |
| doi:10.3390/min7050068 +3 other references |
| Petrov et al. (2001) |
Canada | |
| Richard Gunter Collection |
| J. A. Mandarino (1965) |
| In the collection of Brent Thorne. ... |
In the collection of Brent Thorne. ... | |
Collected and analyzed by Gunnar Farber. | |
Czech Republic | |
| Sejkora et al. (2004) +1 other reference |
Germany | |
| Wittern (2001) |
| Kersten (1839) |
Mexico | |
| Lapis 2001 (1) |
M. Kampf collection | |
Russia | |
| Serafimova et al. (1994) |
| Kalinin (2021) |
UK | |
| Technical Report TR-02-09 (March 2002) +1 other reference |
USA | |
| Eckel et al. (1997) |
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Virgen de Surumi mine, Pakajake Canyon, Colquechaca, Colquechaca Municipality, Chayanta Province, Potosí, Bolivia