Fiemmeite
A valid IMA mineral species
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About Fiemmeite
Formula:
Cu2(C2O4)(OH)2 · 2H2O
Colour:
Sky blue
Lustre:
Vitreous, Waxy
Specific Gravity:
2.78
Crystal System:
Monoclinic
Name:
Named for the Fiemme Valley (Val di Fiemme), Italy, that includes the type locality.
New structure type.
Yet another Cu-bearing oxalate mineral (compare moolooite, middlebackite, wheatleyite, and antipinite).
Found at the type locality in coalified woods in Upper Permian Sandstone permeated by mineralizing solutions containing Cu, U, As, Pb and Zn. The oxalate anions have originated from diagenesis of the plant remains included in sandstones.
Yet another Cu-bearing oxalate mineral (compare moolooite, middlebackite, wheatleyite, and antipinite).
Found at the type locality in coalified woods in Upper Permian Sandstone permeated by mineralizing solutions containing Cu, U, As, Pb and Zn. The oxalate anions have originated from diagenesis of the plant remains included in sandstones.
Unique Identifiers
Mindat ID:
52907
Long-form identifier:
mindat:1:1:52907:9
GUID
(UUID V4):
(UUID V4):
56d10d9e-8d12-4043-8187-ec66dd035869
IMA Classification of Fiemmeite
Approved
Approval year:
2018
First published:
2018
Classification of Fiemmeite
10.AB.47
10 : ORGANIC COMPOUNDS
A : Salts of organic acids
B : Oxalates
10 : ORGANIC COMPOUNDS
A : Salts of organic acids
B : Oxalates
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 |
|---|---|---|
| Fmm | 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 Fiemmeite
Vitreous, Waxy
Transparency:
Transparent
Colour:
Sky blue
Streak:
Pale blue
Tenacity:
Brittle
Cleavage:
Perfect
Almost perfect parallel to {010} or {001}
Almost perfect parallel to {010} or {001}
Density:
2.78(1) g/cm3 (Measured) 2.802 g/cm3 (Calculated)
Chemistry of Fiemmeite
Mindat Formula:
Cu2(C2O4)(OH)2 · 2H2O
Elements listed:
Crystallography of Fiemmeite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Setting:
P21/c
Cell Parameters:
a = 3.4245(6) Å, b = 10.141(2) Å, c = 19.397(3) Å
β = 90.71(1)°
β = 90.71(1)°
Ratio:
a:b:c = 0.338 : 1 : 1.913
Unit Cell V:
673.56 ų (Calculated from Unit Cell)
Twinning:
None
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 9.71 Å | (55) |
| 7.02 Å | (28) |
| 5.079 Å | (100) |
| 4.501 Å | (50) |
| 3.072 Å | (58) |
| 2.891 Å | (20) |
| 2.730 Å | (15) |
| 2.686 Å | (25) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 10a: Neoproterozoic oxygenation/terrestrial biosphere | <0.6 |
| 50 : Coal and/or oil shale minerals | <0.36 |
| 53 : Other minerals with taphonomic origins | <0.4 |
Type Occurrence of Fiemmeite
General Appearance of Type Material:
Aggregates up to 1 mm across made of sky blue elongated platelets with maximum dimensions about 50 μm.
Place of Conservation of Type Material:
Mineralogical collections of MUSE – Museo delle Scienze di Trento, Corso del Lavoro e della Scienza 3, I-38122 Trento, Italy, sample n. 5249
Geological Setting of Type Material:
Uranium "roll front" type mineralization
Reference:
Demartin, F.; Campostrini, I.; Ferretti, P.; Rocchetti, I. (2018) Fiemmeite Cu2(C2O4)(OH)2∙2H2O, a New Mineral from Val di Fiemme, Trentino, Italy. Minerals 2018: 8: 248.
Synonyms of Fiemmeite
Common Associates
Related Minerals - Strunz-mindat Grouping
| 10.AB. | Deveroite-(Ce) | Ce2(C2O4)3 · 10H2O |
| 10.AB.X | Falottaite | MnC2O4 · 3H2O |
| 10.AB. | Uroxite | [(UO2)2(C2O4)(OH)2(H2O)2] · H2O |
| 10.AB. | Andreybulakhite | Ni(C2O4) · 2H2O |
| 10.AB. | Edwindavisite | Cu(C2O4)(NH3) |
| 10.AB.05 | Humboldtine | Fe2+(C2O4) · 2H2O |
| 10.AB.05 | Lindbergite | Mn2+(C2O4) · 2H2O |
| 10.AB.05 | Katsarosite | Zn(C2O4) · 2H2O |
| 10.AB.10 | Glushinskite | Mg(C2O4) · 2H2O |
| 10.AB.15 | Moolooite | Cu(C2O4) · nH2O |
| 10.AB.20 | Stepanovite | NaMgFe3+(C2O4)3 · 8-9H2O |
| 10.AB.25 | Minguzzite | K3Fe3+(C2O4)3 · 3H2O |
| 10.AB.30 | Wheatleyite | Na2Cu(C2O4)2 · 2H2O |
| 10.AB.35 | Zhemchuzhnikovite | NaMgAl(C2O4)3 · 8H2O |
| 10.AB.40 | Weddellite | Ca(C2O4) · (2.5-x)H2O |
| 10.AB.45 | Whewellite | Ca(C2O4) · H2O |
| 10.AB.50 | Caoxite | Ca(C2O4) · 3H2O |
| 10.AB.50 | Middlebackite | Cu2C2O4(OH)2 |
| 10.AB.52 | Metauroxite | (UO2)2(C2O4)(OH)2(H2O)2 |
| 10.AB.55 | Oxammite | (NH4)2(C2O4) · H2O |
| 10.AB.60 | Natroxalate | Na2(C2O4) |
| 10.AB.60 | Phoxite | (NH4)2Mg2(C2O4)(PO3OH)2(H2O)4 |
| 10.AB.60 | Carboferriphoxite | [(NH4)K(H2CO3)][Fe3+(HPO4)(H2PO4)(C2O4)] |
| 10.AB.60 | Ferriphoxite | [(NH4)2K(H2O)][Fe3+(HPO4)2(C2O4)] |
| 10.AB.65 | Coskrenite-(Ce) | (Ce,Nd,La)2(C2O4)(SO4)2 · 12H2O |
| 10.AB.70 | Levinsonite-(Y) | (Y,Nd,La)Al(C2O4)(SO4)2 · 12H2O |
| 10.AB.75 | Zugshunstite-(Ce) | (Ce,Nd,La)Al(C2O4)(SO4)2 · 12H2O |
| 10.AB.80 | Novgorodovaite | Ca2(C2O4)Cl2 · 2H2O |
Fluorescence of Fiemmeite
none
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 Fiemmeite
mindat.org URL:
https://www.mindat.org/min-52907.html
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References for Fiemmeite
Reference List:
Hålenius, U., Hatert, F., Pasero, M., Mills, S. J. (2018) CNMNC Newsletter No 43, New minerals and nomenclature modifications approved in 2018. Mineralogical Magazine, 82 (3) 779-785 doi:10.1180/mgm.2018.72p.780
Localities for Fiemmeite
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.
Italy (TL) | |
| Mineralogical Magazine +4 other references |
Quick NavTopAbout FiemmeiteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Chemistry Crystallography X-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsCommon AssociatesStrunz-MindatFluorescence Other InformationInternet Links References Localities Locality List
Val Gardena Sandstone exposure near San Lugano pass, Carano, Ville di Fiemme, Trento Province, Trentino-Alto Adige, Italy