Alvanite
A valid IMA mineral species
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About Alvanite
Formula:
ZnAl4(V5+O3)2(OH)12 · 2H2O
Colour:
Pale bluish green to bluish black.
Lustre:
Vitreous, Pearly
Hardness:
3 - 3½
Specific Gravity:
2.49
Crystal System:
Monoclinic
Name:
Named in allusion to its composition, containing ALuminium and VANadium.
Unique Identifiers
Mindat ID:
165
Long-form identifier:
mindat:1:1:165:2
GUID
(UUID V4):
(UUID V4):
f94bac86-04b8-4ecd-ab2b-9b62c08e5f83
IMA Classification of Alvanite
Classification of Alvanite
8.FE.05
8 : PHOSPHATES, ARSENATES, VANADATES
F : Polyphosphates, Polyarsenates, [4]-Polyvanadates
E : Ino-[4]-vanadates
8 : PHOSPHATES, ARSENATES, VANADATES
F : Polyphosphates, Polyarsenates, [4]-Polyvanadates
E : Ino-[4]-vanadates
42.13.13.1
42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
13 : Miscellaneous
42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
13 : Miscellaneous
21.3.2
21 : Vanadates (and vanadates with arsenate or phosphate)
3 : Vanadates of Al, rare earths, Pb, V or Bi
21 : Vanadates (and vanadates with arsenate or phosphate)
3 : Vanadates of Al, rare earths, Pb, V or Bi
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 |
---|---|---|
Alv | 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 Alvanite
Vitreous, Pearly
Transparency:
Translucent
Comment:
Pearly on cleavages.
Colour:
Pale bluish green to bluish black.
Streak:
White
Hardness:
3 - 3½ on Mohs scale
Cleavage:
Perfect
On {010}.
On {010}.
Fracture:
Micaceous
Density:
2.49 g/cm3 (Measured) 2.492 g/cm3 (Calculated)
Optical Data of Alvanite
Type:
Biaxial (-)
RI values:
nα = 1.658 nγ = 1.714
2V:
Measured: 80° to 85°
Max Birefringence:
δ = 0.056
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:
Moderate
Dispersion:
r < v, strong
Chemistry of Alvanite
Mindat Formula:
ZnAl4(V5+O3)2(OH)12 · 2H2O
Crystallography of Alvanite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/m
Cell Parameters:
a = 17.808 Å, b = 5.132 Å, c = 8.881 Å
β = 92.11°
β = 92.11°
Ratio:
a:b:c = 3.47 : 1 : 1.731
Unit Cell V:
811.09 ų (Calculated from Unit Cell)
Z:
2
Morphology:
In hexagonal platelets, micalike, with forms {001}, {010}, {100}, and {101}.
Twinning:
Polysynthetic, parallel to {010}.
Crystal Structure
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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) |
---|---|---|---|---|---|---|---|
0014847 | Alvanite | Pertlik F, Dunn P J (1990) Crystal structure of alvanite, (Zn,Ni)Al4(VO3)2(OH)12*2H2O, the first example of an unbranched zweier-single chain vanadate in nature Neues Jahrbuch fur Mineralogie, Monatshefte 1990 385-392 | 1990 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
4.46 Å | (100) |
8.91 Å | (90) |
7.85 Å | (80) |
5.02 Å | (50) |
1.973 Å | (40) |
3.287 Å | (35) |
2.957 Å | (35) |
Comments:
Kazakhstan. Data from Dunn et al. (1990).
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] |
Type Occurrence of Alvanite
Co-Type Localities:
General Appearance of Type Material:
Micalike platelets.
Place of Conservation of Type Material:
Mining Institute, St. Petersburg, 1249/2; A.E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia, 65614.
Geological Setting of Type Material:
In the oxidation zone of a vanadiferous clay-anthraxolite horizon.
Associated Minerals at Type Locality:
Other Language Names for Alvanite
Relationship of Alvanite to other Species
Structurally related to group(s):
Chalcoalumite Group | A group of metal(II)-Al-sulphates, with additional anions in some species. |
Related Minerals - Strunz-mindat Grouping
8.FE.05 | Ankinovichite | (Ni,Zn)Al4(V5+O3)2(OH)12 · 2.5H2O |
Other Information
Thermal Behaviour:
Heated in the closed tube, it yields much acid water and turns brown.
Notes:
Soluble in HCl and HNO3 only when heated.
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 Alvanite
mindat.org URL:
https://www.mindat.org/min-165.html
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References for Alvanite
Localities for Alvanite
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.
Kazakhstan (TL) | |
| Ankinovich (1959) +2 other references |
| Ankinovich (1959) +2 other references |
| Amer.Mineral. (1961) |
Bernard et al. (2004) |
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Kurumsak V Deposit, Aksumbe, Turkistan Region, Kazakhstan