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Monimolite
A valid IMA mineral species - grandfathered - questionable
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About Monimolite
Formula:
Pb2Sb5+2O7
Formula as recorded in current (2024) IMA mineral list.
Colour:
Yellow, gray-green, dark brown
Lustre:
Adamantine, Greasy
Hardness:
4½ - 6
Specific Gravity:
5.94 - 7.29
Crystal System:
Isometric
Name:
From the Greek ÎŒÏÏ
ÄÎŒÎżÏ = "monimos" for "stable," in allusion to the difficulty with which it is decomposed chemically.
A secondary mineral occurring in calcite veins in iron and manganese deposits and in the oxidized zone of a polymetallic deposit.
The problematical species monimolite (IgelstroÌm 1865, Mason & Vitaliano 1953) is almost certainly identical with oxyplumboromĂ©ite, but needs re-examination. According to HĂ„lenius and Bosi (2013), monimolite should be discredited.
The problematical species monimolite (IgelstroÌm 1865, Mason & Vitaliano 1953) is almost certainly identical with oxyplumboromĂ©ite, but needs re-examination. According to HĂ„lenius and Bosi (2013), monimolite should be discredited.
Unique Identifiers
Mindat ID:
2757
Long-form identifier:
mindat:1:1:2757:7
IMA Classification of Monimolite
Approved, 'Grandfathered' (first described prior to 1959), Questionable
IMA Formula:
Pb2+2Sb5+2O7
Classification of Monimolite
4.DH.20
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
D : Metal: Oxygen = 1:2 and similar
H : With large (+- medium-sized) cations; sheets of edge-sharing octahedra
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
D : Metal: Oxygen = 1:2 and similar
H : With large (+- medium-sized) cations; sheets of edge-sharing octahedra
44.1.1.4
44 : ANTIMONATES
1 : A2X2O6(O,OH,F)
44 : ANTIMONATES
1 : A2X2O6(O,OH,F)
24.3.6
24 : Antimonates and Antimonites
3 : Antimonates of Ti and Pb
24 : Antimonates and Antimonites
3 : Antimonates of Ti and Pb
Mineral Symbols
As of 2021 there are now IMAâCNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Mml | IMAâCNMNC | Warr, L.N. (2021). IMAâCNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Monimolite
Adamantine, Greasy
Transparency:
Opaque
Colour:
Yellow, gray-green, dark brown
Streak:
Straw-yellow to cinnamon-brown
Hardness:
4½ - 6 on Mohs scale
Cleavage:
Poor/Indistinct
Indistinct on {111}.
Indistinct on {111}.
Fracture:
Splintery, Sub-Conchoidal
Density:
5.94 - 7.29 g/cm3 (Measured)
Optical Data of Monimolite
Type:
Isotropic
RI values:
n = 2.06
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
Comments:
May exhibit weak anisotropism.
Chemistry of Monimolite
Mindat Formula:
Pb2Sb5+2O7
Formula as recorded in current (2024) IMA mineral list.
Formula as recorded in current (2024) IMA mineral list.
Element Weights:
Elements listed:
Common Impurities:
Fe
Crystallography of Monimolite
Crystal System:
Isometric
Class (H-M):
m3m(4/m32/m) - Hexoctahedral
Cell Parameters:
a = 10.47 Å
Unit Cell V:
1,147.73 Ă
Âł (Calculated from Unit Cell)
Morphology:
Crystals are octahedra with {113}, or less commonly, cube-dominant, with {111} and {011}.
Comment:
Class is probable.
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Near-surface Processes | |
| 23 : Subaerial aqueous alteration by non-redox-sensitive fluids (see also #47) | |
| Stage 7: Great Oxidation Event | <2.4 |
| 47d : [Arsenates, antimonates, selenates, bismuthinates] | |
| 47h : [Near-surface oxidized, dehydrated minerals] |
Type Occurrence of Monimolite
Geological Setting of Type Material:
Calcite veins in an iron and manganese deposit.
Associated Minerals at Type Locality:
Synonyms of Monimolite
Other Language Names for Monimolite
Spanish:Jujuyita
Monimolita
Monimolita
Common Associates
Associations Based on Photo Data:
Related Minerals - Strunz-mindat Grouping
| 4.DH. | Cesiokenopyrochlore | â»Nb2(O,OH)6(Cs,â») |
| 4.DH. | Roméite Group | A2(Sb5+)2O6Z |
| 4.DH. | Oxyplumboroméite | Pb2Sb2O6O |
| 4.DH. | Fluornatropyrochlore | (Na,Pb,Ca,REE,U)2Nb2O6F |
| 4.DH. | Hydroxykenomicrolite | (â»,Na,Sb3+)2Ta2O6(OH,Cs) |
| 4.DH. | 'Fluornatroroméite' | (Na,Ca)2Sb2(O,OH)6F |
| 4.DH. | Oxyyttrobetafite-(Y) | Y2Ti2O6O |
| 4.DH.05 | Thorutite | (Th,U,Ca)Ti2(O,OH)6 |
| 4.DH.05 | Orthobrannerite | U4+U6+Ti4O12(OH)2 |
| 4.DH.05 | Brannerite | UTi2O6 |
| 4.DH.10 | Kassite | CaTi2O4(OH)2 |
| 4.DH.10 | Lucasite-(La) | |
| 4.DH.10 | Lucasite-(Ce) | CeTi2(O,OH)6 |
| 4.DH.15 | 'Fluorhydropyrochlore' | |
| 4.DH.15 | Hydrokenoelsmoreite | â»2W2O6(H2O) |
| 4.DH.15 | 'Hydroxynatromicrolite' | (Na,Bi3+,â»)2Ta2O6(OH) |
| 4.DH.15 | Hydroplumboelsmoreite | (Pb,â»)(W,Fe3+)2O6 · H2O |
| 4.DH.15 | Hydropyrochlore | (H2O,â»)2Nb2(O,OH)6(H2O) |
| 4.DH.15 | 'Unnamed (Sb-analogue of Hydroxymanganopyrochlor)' | (Mn,Ca,Y)2(Sb,Ti)2O6(OH) |
| 4.DH.15 | Hydroxynatropyrochlore | (Na,Ca,Ce)2Nb2O6(OH) |
| 4.DH.15 | Hydrokenopyrochlore | (â»,x)2Nb2O6(H2O,Cs) |
| 4.DH.15 | Oxybismutomicrolite | (Bi1.33â»0.67)ÎŁ2Ta2O6O |
| 4.DH.15 | Kenomicrolite | â»2Ta2[O4(OH)2]â» |
| 4.DH.15 | Fluornatromicrolite | (Na1.5Bi0.5)Ta2O6F |
| 4.DH.15 | 'Oxynatropyrochlore' | (Na,Ca,U)2Nb2O6(O,OH) |
| 4.DH.15 | Hydroxycalciopyrochlore | (Ca,Na,U,â»)2(Nb,Ti)2O6(OH) |
| 4.DH.15 | Fluorcalciopyrochlore | (Ca,Na)2(Nb,Ti)2O6F |
| 4.DH.15 | Oxycalciopyrochlore | Ca2Nb2O6O |
| 4.DH.15 | 'Fluorstrontiopyrochlore' | (Sr,â»)2Nb2(O,OH)6F |
| 4.DH.15 | Oxyplumbopyrochlore | Pb2Nb2O6O |
| 4.DH.15 | 'Fluorplumbopyrochlore' | (Pb,Y,Th,U,Na,Ca)2-x(Nb,Ti)2O6F |
| 4.DH.15 | 'Bismutomicrolite (of Hogarth 1977)' | |
| 4.DH.15 | 'Bismutopyrochlore (of Chukanov et al.)' | (Bi,Ca,U,Pb)2-xNb2(O,OH)6(OH) |
| 4.DH.15 | 'Kenoplumbopyrochlore' | (Pb,â»)Nb2O6(â»,O) |
| 4.DH.15 | Hydroxyplumbopyrochlore | (Pb1.5â»0.5)Nb2O6(OH) |
| 4.DH.15 | 'Stibiomicrolite (of Groat et al.)' | |
| 4.DH.15 | 'Oxyyttropyrochlore-(Y)' | (Y,â»)2Nb2O6O |
| 4.DH.15 | 'Fluorkenopyrochlore' | (â»,Sr,Ce,Ca,Na)2(Nb,Ti)2O6F |
| 4.DH.15 | Hydroxycalciomicrolite | Ca1.5Ta2O6(OH) |
| 4.DH.15 | 'Strontiopyrochlore (of Hogarth 1977)' | (Sr,Ce,Ca)0.66(Nb,Fe)2(O,OH)7 |
| 4.DH.15 va | 'Alumotungstite' | â»2W2O6(H2O) |
| 4.DH.15 | 'Oxycalciobetafite' | Ca2(Ti,Nb)2O6O |
| 4.DH.15 | 'Oxyuranobetafite' | (U,Ca,â»)2(Ti,Nb)2O6O |
| 4.DH.15 | Fluorcalciomicrolite | (Ca,Na)2(Ta,Nb)2O6F |
| 4.DH.15 | Oxycalciomicrolite | Ca2Ta2O6O |
| 4.DH.15 | Oxystannomicrolite | Sn2Ta2O6O |
| 4.DH.15 | Kenoplumbomicrolite | (Pb,â»)2Ta2O6(â»,OH,O) |
| 4.DH.15 | Oxynatromicrolite | (Na,Ca,U)2(Ta,Nb)2O6(O,F) |
| 4.DH.15 | Oxystibiomicrolite | (Sb3+,Ca)2Ta2O6O |
| 4.DH.15 | 'Hydromicrolite' | (H2O,â»)2Ta2(O,OH)6(H2O) |
| 4.DH.15 | 'Plumbomicrolite (of Hogarth 1977)' | |
| 4.DH.15 | Hydrokenomicrolite | (â»,H2O)2Ta2(O,OH)6(H2O) |
| 4.DH.15 | Hydroxykenoelsmoreite | (â»,Pb)2(W,Fe3+,Al)2(O,OH)6(OH) |
| 4.DH.15 va | 'Yttromicrolite (of Hogarth)' | (Ca,Y3+,U,Na)2-x(Ta,Nb,Ti,Fe3+)2O7 |
| 4.DH.15 | Hydroxykenopyrochlore | (â»,Ce,Ba)2(Nb,Ti)2O6(OH,F) |
| 4.DH.15 | Hydroxymanganopyrochlore | (Mn2+,Th,Na,Ca,REE)2(Nb,Ti)2O6(OH) |
| 4.DH.20 | 'Cuproroméite' | Cu2Sb2(O,OH)7 |
| 4.DH.20 | Hydroxycalcioroméite | (Ca,Sb3+)2(Sb5+,Ti)2O6(OH) |
| 4.DH.20 | Bindheimite | Pb2Sb2O6O |
| 4.DH.20 | HydroxyferroromĂ©ite | (Fe2+1.5â»0.5)Sb5+2O6(OH) |
| 4.DH.20 | FluorcalcioromĂ©ite | (Ca,Na,â»)2Sb5+2(O,OH)6F |
| 4.DH.20 | OxycalcioromeÌite | Ca2Sb2O6O |
| 4.DH.20 | Stetefeldtite | Ag2Sb2(O,OH)7 |
| 4.DH.20 | Stibiconite | Sb3+Sb5+2O6(OH) |
| 4.DH.25 | Rosiaite | PbSb5+2O6 |
| 4.DH.30 | Stefanweissite | (Ca,REE)2Zr2(Nb,Ti)(Ti,Nb)2Fe2+O14 |
| 4.DH.30 | Zirconolite | CaZrTi2O7 |
| 4.DH.30 | Laachite | (Ca,Mn)2Zr2Nb2TiFeO14 |
| 4.DH.30 | Nöggerathite-(Ce) | (Ce,Ca)2Zr2(Nb,Ti)(Ti,Nb)2Fe2+O14 |
| 4.DH.35 | Liandratite | U(Nb,Ta)2O8 |
| 4.DH.35 | Petscheckite | UFe(Nb,Ta)2O8 |
| 4.DH.40 | Ingersonite | Ca3Mn2+Sb5+4O14 |
| 4.DH.45 | Pittongite | Na0.22(W,Fe3+)(O,OH)3 · 0.44H2O |
| 4.DH.50 | Tazzoliite | Ba4-xNaxTi2Nb3SiO17[PO2(OH)2]x(OH)(1-2x) |
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 Monimolite
mindat.org URL:
https://www.mindat.org/min-2757.html
Please feel free to link to this page.
Please feel free to link to this page.
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References for Monimolite
Reference List:
Mason, Brian, Vitaliano, Charles J. (1953) The mineralogy of the antimony oxides and antimonates. Mineralogical Magazine and Journal of the Mineralogical Society, 30 (221). 100-112 doi:10.1180/minmag.1953.030.221.03
Localities for Monimolite
Showing 6 localities.
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
â - 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.
Sweden | |
| Nordenskiöld (1877) +1 other reference |
| Ek (2003) | |
| Igelström (1865) +2 other references |
USA | |
| Hayes et al. (2019) |
| Bullock (1981) |
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Harstigen Mine, Pajsberg, Persberg ore district, Filipstad, VĂ€rmland County, Sweden