Nollmotzite
A valid IMA mineral species
This page is currently not sponsored. Click here to sponsor this page.
About Nollmotzite
Markus Noller and Reinhard Motzigemba
Formula:
Mg[U5+(U6+O2)2O4F3] · 4H2O
Colour:
Deep-violet–brown
Lustre:
Vitreous
Crystal System:
Monoclinic
Name:
Nollmotzite was named in honour of two German mineral collectors. Markus Noller (born 16 May 1977) discovered this new mineral as collector and photograph; Reinhard Motzigemba (born 14 November 1952) collected it 2016 as assumed "ianthinite" in the Clara mine, Black Forest Mountains, Germany. The name nollmotzite combines the first four letters of their surnames.
May be confused with ianthinite.
One of the very few mineral species with pentavalent uranium, alongside with richetite, wyartite, and shinkolobweite.
Crystal structure based upon β-U3O8 topology.
One of the very few mineral species with pentavalent uranium, alongside with richetite, wyartite, and shinkolobweite.
Crystal structure based upon β-U3O8 topology.
Unique Identifiers
Mindat ID:
52853
Long-form identifier:
mindat:1:1:52853:9
GUID
(UUID V4):
(UUID V4):
783a70f9-7a15-414c-9acd-8848e06887db
IMA Classification of Nollmotzite
Approved
Approval year:
2018
First published:
2018
Type description reference:
Classification of Nollmotzite
4.GB.95
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
G : Uranyl Hydroxides
B : With additional cations (K, Ca, Ba, Pb, etc.); with mainly UO2(O,OH)5 pentagonal polyhedra
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
G : Uranyl Hydroxides
B : With additional cations (K, Ca, Ba, Pb, etc.); with mainly UO2(O,OH)5 pentagonal polyhedra
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 |
|---|---|---|
| Nmz | 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 Nollmotzite
Vitreous
Transparency:
Transparent
Colour:
Deep-violet–brown
Tenacity:
Brittle
Cleavage:
Perfect
{001}
{001}
Optical Data of Nollmotzite
Type:
Biaxial (-)
RI values:
nα = 1.615(3) nβ = 1.750(5) nγ = 1.765(5)
2V:
Measured: 37° (1)
Max Birefringence:
δ = 0.150
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:
High
Dispersion:
Strong, r > v
Pleochroism:
Strong
Comments:
X = colorless, Y = red–brown, Z = deep violet (X << Y < Z)
Chemistry of Nollmotzite
Mindat Formula:
Mg[U5+(U6+O2)2O4F3] · 4H2O
Crystallography of Nollmotzite
Crystal System:
Monoclinic
Class (H-M):
m - Domatic
Space Group:
Bm
Setting:
Cm
Cell Parameters:
a = 7.1122(4) Å, b = 11.7733(7) Å, c = 8.2075(4) Å
β = 98.623(4)°
β = 98.623(4)°
Ratio:
a:b:c = 0.604 : 1 : 0.697
Unit Cell V:
676.98 ų
Z:
2
Morphology:
Thin prisms, elongated on [010], with chisel-like terminations. Crystals exhibit the forms (100), (-100), (001), (00-1), (120) and (-120).
Twinning:
Twinned by reticular merohedry
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 8.10 Å | (100) |
| 4.060 Å | (31) |
| 3.518 Å | (30) |
| 3.420 Å | (54) |
| 3.237 Å | (22) |
| 3.083 Å | (26) |
| 2.710 Å | (17) |
| 2.015 Å | (32) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 47f : [Uranyl (U⁶⁺) minerals] | |
| 47g : [Halogen-bearing surface weathering minerals] |
Type Occurrence of Nollmotzite
General Appearance of Type Material:
Thin prisms, deep-violet–brown, with chisel-like terminations up to about 0.3 mm in length.
Place of Conservation of Type Material:
Cotype material is deposited in the mineralogical collections of the Natural History Museum of Los Angeles County, 900 Exposition Blvd, Los Angeles, California, USA, catalogue numbers 66647, 66648 and 66649
Associated Minerals at Type Locality:
Reference:
Plášil, J., Kampf, A.R., Škoda, R. and Čejka, J. (2018) Nollmotzite, Mg[UV(UVIO2)2O4F3].4H2O, the first natural uranium oxide containing fluorine. Acta Crystallographica: B74: 372–369.
Synonyms of Nollmotzite
Common Associates
Associated Minerals Based on Photo Data:
Related Minerals - Strunz-mindat Grouping
| 4.GB.05 | Agrinierite | K2(Ca,Sr)[(UO2)3O3(OH)2]2 · 5H2O |
| 4.GB.05 | Compreignacite | K2(UO2)6O4(OH)6 · 7H2O |
| 4.GB.05 | Rameauite | K2Ca(UO2)6O6(OH)4 · 6H2O |
| 4.GB.10 | Becquerelite | Ca(UO2)6O4(OH)6 · 8H2O |
| 4.GB.10 | Billietite | Ba(UO2)6O4(OH)6 · 4-8H2O |
| 4.GB.10 | Protasite | Ba(UO2)3O3(OH)2 · 3H2O |
| 4.GB.15 | Richetite | (Fe3+,Mg)Pb 8.6(UO2)36O36(OH)24 · 41H2O |
| 4.GB.20 | Bauranoite | Ba(UO2)2(OH)6 · 1-2H2O |
| 4.GB.20 | Calciouranoite | (Ca,Ba,Pb)U2O7 · 5H2O |
| 4.GB.20 | Metacalciouranoite | (Ca,Ba,Pb,K2)U2O7 · 2H2O |
| 4.GB.25 | Fourmarierite | Pb(UO2)4O3(OH)4 · 4H2O |
| 4.GB.30 | Wölsendorfite | Pb7(UO2)14O19(OH)4 · 12H2O |
| 4.GB.35 | Masuyite | Pb(UO2)3O3(OH)2 · 3H2O |
| 4.GB.40 | Metavandendriesscheite | PbU7O22 · nH2O n < 12 |
| 4.GB.40 | Vandendriesscheite | PbU7O22 · 12H2O |
| 4.GB.45 | Vandenbrandeite | Cu(UO2)(OH)4 |
| 4.GB.50 | Sayrite | Pb2(UO2)5O6(OH)2 · 4H2O |
| 4.GB.55 | Curite | Pb3(H2O)2[(UO2)4O4(OH)3]2 |
| 4.GB.60 | Iriginite | (UO2)Mo2O7 · 3H2O |
| 4.GB.65 | Uranosphaerite | Bi(UO2)O2(OH) |
| 4.GB.70 | Holfertite | CaxU6+2-xTi(O8-xOH4x) · 3H2O |
| 4.GB.75 | Carlosbarbosaite | (UO2)2Nb2O6(OH)2 · 2H2O |
| 4.GB.80 | Gauthierite | KPb[(UO2)7O5(OH)7] · 8H2O |
| 4.GB.85 | Kroupaite | KPb0.5[(UO2)8O4(OH)10] · 10H2O |
| 4.GB.90 | Leesite | K(H2O)2[(UO2)4O2(OH)5] · 3H2O |
| 4.GB.95 | Shinkolobweite | Pb1.25[U5+(H2O)2(U6+O2)5O8(OH)2](H2O)5 |
Fluorescence of Nollmotzite
Non-fluorescent under longwave and shortwave ultraviolet radiation.
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 Nollmotzite
mindat.org URL:
https://www.mindat.org/min-52853.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
External Links:
Mineral Dealers:
References for Nollmotzite
Reference List:
Hålenius, U., Hatert, F., Pasero, M., Mills, S. J. (2018) CNMNC Newsletter no 42: New minerals and nomenclature modifications approved in 2018. Mineralogical Magazine, 82 (2) 445-451 doi:10.1180/mgm.2018.71p.446
Localities for Nollmotzite
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.
Germany (TL) | |
| Mineralogical Magazine: 82: 445–451 +2 other references |
Quick NavTopAbout NollmotziteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography X-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsCommon AssociatesStrunz-MindatFluorescence Other InformationInternet Links References Localities Locality List
Clara Mine, Oberwolfach, Ortenaukreis, Freiburg Region, Baden-Württemberg, Germany