Volaschioite
A valid IMA mineral species
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About Volaschioite
Formula:
Fe4(SO4)O2(OH)6 · 2H2O
Colour:
Yellowish orange
Lustre:
Vitreous, Resinous
Specific Gravity:
3.03 (Calculated)
Crystal System:
Monoclinic
Name:
Named by C. Biagioni, E. Bonaccorsi, and P. Orlandi in 2011 after the ancient name of the type locality, Forno de Volaschio. Forno means furnace. Volaschio has two possible origins. The first is for a hospital, the Hospitale de Volaschio, from the 12th century. The second is that is it is for a man named Volasco who first worked iron at the deposit.
Pronounced volaskioait.
Pronounced volaskioait.
Type Locality:
This page provides mineralogical data about Volaschioite.
Unique Identifiers
Mindat ID:
40051
Long-form identifier:
mindat:1:1:40051:6
GUID
(UUID V4):
(UUID V4):
beed2682-3c62-4ea3-bb9a-807d523215f2
IMA Classification of Volaschioite
Classification of Volaschioite
7.DE.62
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
D : Sulfates (selenates, etc.) with additional anions, with H2O
E : With only medium-sized cations; unclassified
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
D : Sulfates (selenates, etc.) with additional anions, with H2O
E : With only medium-sized cations; unclassified
31.4.11.
31 : HYDRATED SULFATES CONTAINING HYDROXYL OR HALOGEN
4 : (AB)4(XO4)Zq·xH2O
31 : HYDRATED SULFATES CONTAINING HYDROXYL OR HALOGEN
4 : (AB)4(XO4)Zq·xH2O
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 |
|---|---|---|
| Vsh | 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 Volaschioite
Vitreous, Resinous
Transparency:
Transparent
Colour:
Yellowish orange
Streak:
Orange
Tenacity:
Brittle
Cleavage:
Perfect
Perfect on {100}
Perfect on {100}
Density:
3.03 g/cm3 (Calculated)
Optical Data of Volaschioite
Type:
Biaxial
Pleochroism:
Strong
Comments:
Red along [010], yellowish orange normal to that direction.
Chemistry of Volaschioite
Mindat Formula:
Fe4(SO4)O2(OH)6 · 2H2O
Elements listed:
Crystallography of Volaschioite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/m
Setting:
C2/m
Cell Parameters:
a = 16.085(2) Å, b = 3.054(1) Å, c = 10.929(2) Å
β = 93.78(1)°
β = 93.78(1)°
Ratio:
a:b:c = 5.267 : 1 : 3.579
Unit Cell V:
535.70 ų (Calculated from Unit Cell)
Morphology:
Type material: Bladed crystals elongated along [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) |
|---|---|---|---|---|---|---|---|
| 0018472 | Volaschioite | Biagioni C, Bonaccorsi E, Orlandi P (2011) Volaschioite, Fe3+4(SO4)O2(OH)6*2H20, a new mineral species from Fornovolasco, Apuan Alps, Tuscany, Italy The Canadian Mineralogist 49 605-614 | 2011 | Fornovolasco, Tuscany, Italy | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 8.03 Å | (s) |
| 4.37 Å | (m) |
| 3.989 Å | (m) |
| 3.343 Å | (mw) |
| 2.633 Å | (mw) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 47a : [Near-surface hydration of prior minerals] | |
| 47b : [Sulfates and sulfites] | |
| Stage 10b: Anthropogenic minerals | <10 Ka |
| 55 : Anthropogenic mine minerals |
Type Occurrence of Volaschioite
General Appearance of Type Material:
Radial clusters of transparent, yellowish-orange bladed crystals up to 0.1 mm long and <0.005 mm thick.
Place of Conservation of Type Material:
Museo di Storia Naturale e del Territorio, University of Pisa, Italy, catalogue no. 19300
Geological Setting of Type Material:
Oxidation product of pyrite in a magnetite-pyrite ore.
Associated Minerals at Type Locality:
Synonyms of Volaschioite
Related Minerals - Strunz-mindat Grouping
| 7.DE. | Cossaite | (Mg0.5,◻)Al6(SO4)6(HSO4)F6 · 36H2O |
| 7.DE. | Magnesioalterite | Mg2Fe3+4(SO4)4(C2O4)2(OH)4 · 17H2O |
| 7.DE. | Liangjunite | K2(Mo2O5)(SO4)2 · 3H2O |
| 7.DE. | Fabritzite | Zn9(SO4)2(OH)12Cl2 · 6H2O |
| 7.DE. | Downsite | K2(MoO3)3(SO4) · 4H2O |
| 7.DE.05 | Mangazeite | Al2(SO4)(OH)4 · 3H2O |
| 7.DE.10 | Carbonatecyanotrichite | Cu4Al2(CO3,SO4)(OH)12 · 2H2O |
| 7.DE.10 | Cyanotrichite | Cu4Al2(SO4)(OH)12 · 2H2O |
| 7.DE.10 | UKI-1975-(SO:AlCu) | (Cu, Al, SO4, H2O) |
| 7.DE.15 | Schwertmannite | Fe3+16(OH,SO4)12-13O16 · 10-12H2O |
| 7.DE.20 | Tlalocite | Cu10Zn6(Te6+O4)2(Te4+O3)(OH)25Cl · 27H2O |
| 7.DE.25 | Utahite | MgCu4Zn2Te6+3O14(OH)4 · 6H2O |
| 7.DE.35 | Coquandite | Sb6+xO8+x(SO4)(OH)x(H2O)1- x (x = 0.3) |
| 7.DE.40 | Osakaite | Zn4(SO4)(OH)6 · 5H2O |
| 7.DE.42 | Alterite | Zn2Fe3+4(SO4)4(C2O4)2(OH)4 · 17H2O |
| 7.DE.45 | Wilcoxite | MgAl(SO4)2F · 17H2O |
| 7.DE.45 | Barrotite | Cu9Al(HSiO4)2[(SO4)(HAsO4)0.5](OH)12 · 8H2O |
| 7.DE.47 | Tiberiobardiite | {Cu9Al[SiO3(OH)]2(OH)12(H2O)6}(SO4)1.5 · 10H2O |
| 7.DE.50 | Stanleyite | (V4+O)(SO4) · 6H2O |
| 7.DE.50 | Bouškaite | (MoO2)2O(SO3OH)2(H2O)4 |
| 7.DE.57 | Khangalasite | Fe(SO4)(OH) · 2H2O |
| 7.DE.60 | Hydrobasaluminite | Al4(SO4)(OH)10 · 12-36H2O |
| 7.DE.65 | Zaherite | Al12(SO4)5(OH)26 · 20H2O |
| 7.DE.75 | Camérolaite | Cu6Al3(OH)18(H2O)2[Sb(OH)6](SO4) |
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 Volaschioite
mindat.org URL:
https://www.mindat.org/min-40051.html
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References for Volaschioite
Reference List:
Williams, P. A., Hatert, F., Pasero, M., Mills, S. J. (2010) New minerals and nomenclature modifications approved in 2010. CNMNC Newsletter No 3. Mineralogical Magazine, 74 (3) 577-579 doi:10.1180/s0026461x00054979
Localities for Volaschioite
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 | |
| Motzigemba et al. (05/2020) |
Italy (TL) | |
| C. Biagioni (2010) +2 other references |
Poland | |
| Cu +2 other references |
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Schmiedestollen dump, Wittichen, Schenkenzell, Rottweil, Freiburg Region, Baden-Württemberg, Germany