Häggite
A valid IMA mineral species - grandfathered
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About Häggite
Formula:
V3+V4+O2(OH)3
For synthetic häggite, Wu et al. (2009) suggest the formula V4O6(OH)4.
Colour:
Black
Hardness:
4½
Specific Gravity:
3.51 (Calculated)
Crystal System:
Monoclinic
Name:
Named by H.T. Evans, Jr. and Mary E. Rose in 1958 in honor of Gunnar Hägg (14 December 1903, Stockholm, Sweden - 28 May 1986), chemist, crystallographer and professor of General and Inorganic Chemistry at the University of Uppsala, Sweden.
Type Locality:
This page provides mineralogical data about Häggite.
Unique Identifiers
Mindat ID:
1796
Long-form identifier:
mindat:1:1:1796:7
GUID
(UUID V4):
(UUID V4):
68ddd164-6fac-41a8-8c07-aacf2ae6490a
IMA Classification of Häggite
Approved, 'Grandfathered' (first described prior to 1959)
First published:
1958
Classification of Häggite
4.HE.25
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
H : V[5,6] Vanadates
E : Phyllovanadates
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
H : V[5,6] Vanadates
E : Phyllovanadates
6.4.3.1
6 : HYDROXIDES AND OXIDES CONTAINING HYDROXYL
4 : Miscellaneous
6 : HYDROXIDES AND OXIDES CONTAINING HYDROXYL
4 : Miscellaneous
7.12.4
7 : Oxides and Hydroxides
12 : Oxides of V, Nb and Ta
7 : Oxides and Hydroxides
12 : Oxides of V, Nb and Ta
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 |
---|---|---|
Hgg | 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 Häggite
Optical Data of Häggite
Type:
Biaxial
Anisotropism:
Very strong yellowish gray to bluish gray.
Reflectivity:
Wavelength | R |
---|---|
440nm | 11.7-11.0% |
460nm | 11.8-11.0% |
480nm | 12.0-11.0% |
500nm | 12.3-11.0% |
520nm | 12.3-11.0% |
540nm | 13.0-11.1% |
560nm | 13.4-11.2% |
580nm | 13.7-11.2% |
600nm | 14.0-11.2% |
620nm | 14.3-11.2% |
640nm | 14.6-11.2% |
660nm | 14.9-11.3% |
680nm | 15.2-11.5% |
700nm | 15.6-11.9% |
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 15.6-11.9%.
Colour in reflected light:
Gray to dark gray
Chemistry of Häggite
Mindat Formula:
V3+V4+O2(OH)3
For synthetic häggite, Wu et al. (2009) suggest the formula V4O6(OH)4.
For synthetic häggite, Wu et al. (2009) suggest the formula V4O6(OH)4.
Elements listed:
Crystallography of Häggite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/m
Setting:
C2/m
Cell Parameters:
a = 12.17(5) Å, b = 2.99(1) Å, c = 4.83(2) Å
β = 94.25(8)°
β = 94.25(8)°
Ratio:
a:b:c = 4.07 : 1 : 1.615
Unit Cell V:
175.27 ų (Calculated from Unit Cell)
Z:
2
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
4.80 Å | (100) |
4.05 Å | (50) |
3.51 Å | (12) |
3.02 Å | (25) |
2.44 Å | (25) |
1.959 Å | (18) |
1.815 Å | (12) |
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 7: Great Oxidation Event | <2.4 |
47a : [Near-surface hydration of prior minerals] | |
47e : [Vanadates, chromates, manganates] | |
47h : [Near-surface oxidized, dehydrated minerals] |
Geological Setting:
oxidized zone of Colorado Plateau-type U-V deposits.
Type Occurrence of Häggite
Place of Conservation of Type Material:
National Museum of Natural History, Washington, D.C., USA.
Associated Minerals at Type Locality:
Reference:
Evans, H.T., Mrose, M.E. (1958) The crystal structures of three new vanadium oxide minerals. Acta Crystallographica: 11: 56-58.
Synonyms of Häggite
Other Language Names for Häggite
Common Associates
Associated Minerals Based on Photo Data:
7 photos of Häggite associated with Tyuyamunite | Ca(UO2)2(VO4)2 · 5-8H2O |
5 photos of Häggite associated with Calcite | CaCO3 |
2 photos of Häggite associated with Hummerite | K2Mg2(V10O28) · 16H2O |
1 photo of Häggite associated with Gypsum | CaSO4 · 2H2O |
1 photo of Häggite associated with Grantsite | (Na,Ca)2+x(V5+,V4+)6O16 · 4H2O |
Related Minerals - Strunz-mindat Grouping
4.HE.05 | Melanovanadite | Ca(V5+,V4+)4O10 · 5H2O |
4.HE.10 | Shcherbinaite | V5+2O5 |
4.HE.15 | Hewettite | CaV6O16 · 9H2O |
4.HE.15 | Metahewettite | CaV6O16 · 3H2O |
4.HE.20 | Bariandite | Al0.6(V5+,V4+)8O20 · 9H2O |
4.HE.20 | Bokite | (Al,Fe)1.3(V5+,V4+,Fe3+)8O20 · 7.5H2O |
4.HE.20 | Corvusite | (Na,K,Ca,Mg)2(V5+,V4+,Fe2+)8O20 · 6-10H2O |
4.HE.20 | Fernandinite | (Ca,K)(V5+,V4+,Fe2+)8O20 · 10H2O |
4.HE.20 | Straczekite | (Ca,K,Ba)(V5+,V4+)8O20 · 3H2O |
4.HE.30 | Doloresite | V4+3O4(OH)4 |
4.HE.35 | Duttonite | V4+O(OH)2 |
4.HE.40 | Cavoite | CaV4+3O7 |
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 Häggite
mindat.org URL:
https://www.mindat.org/min-1796.html
Please feel free to link to this page.
Please feel free to link to this page.
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External Links:
Mineral Dealers:
References for Häggite
Reference List:
Localities for Häggite
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.
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Ambrosia Lake Mining Sub-district, McKinley County, New Mexico, USA