Humboldtine Group
A material that is NOT an approved mineral species
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About Humboldtine Group
Formula:
M2+(C2O4) · 2H2O
M = Fe, Mn, Mg, Zn
Several synthetic members are known (with M = Co, Ni, Zn).
Various space-group symmetries (monoclinic, orthorhombic and triclinic) have been reported for these M(II) oxalate dihydrates.
The natural members mainly crystallise in space group C2/c.
Various space-group symmetries (monoclinic, orthorhombic and triclinic) have been reported for these M(II) oxalate dihydrates.
The natural members mainly crystallise in space group C2/c.
Unique Identifiers
Mindat ID:
43258
Long-form identifier:
mindat:1:1:43258:8
GUID
(UUID V4):
(UUID V4):
46ea863e-9a27-4553-bccd-c6d30fdc58c9
Chemistry of Humboldtine Group
Mindat Formula:
M2+(C2O4) · 2H2O
M = Fe, Mn, Mg, Zn
M = Fe, Mn, Mg, Zn
Crystal Structure
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Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
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CIF File Best | x | y | z | a | b | c
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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) |
---|---|---|---|---|---|---|---|
0019940 | Humboldtine | Echigo T, Kimata M (2008) Single-crystal X-ray diffraction and spectroscopic studies on humboldtine and lindbergite: weak Jahn-Teller effect of Fe2+ ion Physics and Chemistry of Minerals 35 467-475 | 2008 | synthetic | 0 | 293 | |
0019963 | Lindbergite | Soleimannejad J, Aghabozorg H, Hooshmand S, Ghadermaz M, Gharamaleki J A (2007) The monoclinic polymorph of catena-poly [[diaquamanganese(II)]-mu-oxalato-4O1,O2:O1',O2'] Acta Crystallographica E63 m2389-m2390 | 2007 | synthetic | 0 | 293 | |
0019964 | Lindbergite | Deyrieux R, Berro C, Peneloux A (1973) Contribution a l'etude des oxalates de certains metaux bivalents. III. - Structure cristalline des oxalates dihydrates de manganese, de cobalt, de nickel et de zinc. Polymorphisme des oxalates dihydrates de cobalt et de nickel Bulletin de la Societe Chimique de France 1973 25-34 | 1973 | synthetic | 0 | 293 |
CIF Raw Data - click here to close
Relationship of Humboldtine Group to other Species
Group Members:
Andreybulakhite | Ni(C2O4) · 2H2O | Mon. 2/m : B2/b |
Glushinskite | Mg(C2O4) · 2H2O | Mon. 2/m : B2/b |
Humboldtine | Fe2+(C2O4) · 2H2O | Mon. 2/m |
Katsarosite | Zn(C2O4) · 2H2O | Mon. 2/m : B2/b |
Lindbergite | Mn2+(C2O4) · 2H2O | Mon. 2/m |
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 Humboldtine Group
mindat.org URL:
https://www.mindat.org/min-43258.html
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References for Humboldtine Group
Reference List:
Csordakúti Mine, Bicske-Csordakút, Bicskei District, Fejér County, Hungary