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Bassoite

A valid IMA mineral species
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09117830017271951473620.jpg
Bassoite

Molinello Mine, Ne, Genoa, Liguria, Italy
09117830017271951473620.jpg
Bassoite

Molinello Mine, Ne, Genoa, Liguria, Italy
09117830017271951473620.jpg
Bassoite

Molinello Mine, Ne, Genoa, Liguria, Italy
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About BassoiteHide

06734940017271951487098.jpg
Riccardo Basso
Formula:
SrV3O7 · 4H2O
Colour:
Black
Lustre:
Sub-Metallic
Hardness:
4 - 4½
Specific Gravity:
2.940 (Calculated)
Crystal System:
Monoclinic
Name:
In honour of Riccardo Basso (b. 1947), full professor of Mineralogy and Crystallography at the University of Genova. He has "worked on the characterization of several new V-rich minerals from the Ligurian region and has determined the crystal structure of most of them."
This page provides mineralogical data about Bassoite.


Unique IdentifiersHide

Mindat ID:
42240
Long-form identifier:
mindat:1:1:42240:2

Similar NamesHide

BasiteA rock subtype
BazziteA valid IMA mineral species - grandfatheredBe3Sc2(Si6O18)
BeusiteA valid IMA mineral speciesMn2+Mn22+ (PO4)2
Beusite-(Ca)A valid IMA mineral speciesCaMn22+(PO4)2
BohseiteA valid IMA mineral speciesCa4Be3+xAl1-xSi9O25-x(OH)3+x
BosiiteA valid IMA mineral speciesNaFe33+(Al4Mg2)(Si6O18)(BO3)3(OH)3O
BosoiteA valid IMA mineral speciesSiO2 · nCxH2x+2
Bussyite-(Ce)A valid IMA mineral species(Ce,REE)3(Na,H2O)6MnSi9Be5(O,OH)30F4
Bussyite-(Y)A valid IMA mineral species(Y,REE,Ca)3(Na,Ca)6MnSi9Be5(O,OH,F)34

IMA Classification of BassoiteHide

Classification of BassoiteHide

Strunz-mindat (2026):
4.H0.

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
H : V[5,6] Vanadates
0 :

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference for Standard
BsoIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of BassoiteHide

Lustre:
Sub-Metallic
Transparency:
Opaque
Colour:
Black
Streak:
Black
Hardness:
4 - 4½ on Mohs scale
Hardness:
VHN100=142 - 165 kg/mm2 - Vickers
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
None observed
Density:
2.940 g/cm3 (Calculated)
Comment:
Based on empirical formula

Optical Data of BassoiteHide

Anisotropism:
Very weakly pleochroic
Bireflectance:
Weakly bireflectant
Reflectivity:
WavelengthR1 (%)R2 (%)
471nm18.5%19.0%
548nm17.2%17.8%
586nm16.8%17.5%
652nm16.2%16.8%


Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 19.0%.
R1 shown in black, R2 shown in red
Colour in reflected light:
Grey to a dark green
Internal Reflections:
Absent
Pleochroism:
Weak
Comments:
Very weak, grey to dark green

Chemistry of BassoiteHide

Mindat Formula:
SrV3O7 · 4H2O
Element Weights:
Element% weight
O41.459 %
V36.001 %
Sr20.641 %
H1.900 %

Calculated from ideal end-member formula.
Elements listed:
H, O, Sr, V - search for minerals with similar chemistry

Crystallography of BassoiteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/m
Cell Parameters:
a = 5.313(3) Å, b = 10.495(3) Å, c = 8.568(4) Å
β = 91.14(5)°
Ratio:
a:b:c = 0.506 : 1 : 0.816
Unit Cell V:
477.7 ÅÂģ
Z:
2

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0018516BassoiteBindi L, Carbone C, Cabella R, Lucchetti G (2011) Bassoite, SrV3O7*4H2O, a new mineral from Molinello mine, Val Graveglia, eastern Liguria, Italy Mineralogical Magazine 75 2677-26862011Molinello mine, Val Graveglia, Liguria, Italy0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
8.5663 Å(100)
6.6363 Å(14)
3.4399 Å(14)
3.4049 Å(17)
2.8339 Å(15)
2.7949 Å(11)
2.6550 Å(15)
2.6237 Å(11)
1.8666 Å(15)
Locality:
Molinello Mine, Ne, Genoa, Liguria, Italy
Reference:
Bindi, L., Carbone, C., Cabella, R., Lucchetti, G. (2011) Bassoite, SrV3O7·4H2O, a new mineral from Molinello mine, Val Graveglia, eastern Liguria, Italy. Mineralogical Magazine, 75 (5) 2677-2686 doi:10.1180/minmag.2011.075.5.2677

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 7: Great Oxidation Event<2.4
47a : [Near-surface hydration of prior minerals]
47e : [Vanadates, chromates, manganates]

Type Occurrence of BassoiteHide

Type Locality:
ⓘ Molinello Mine, Ne, Genoa, Liguria, Italy
General Appearance of Type Material:
Black euhedral to subhedral grains up to 400 Ξm across.
Place of Conservation of Type Material:
Holotype material: Dipartimento per lo Studio del Territorio e delle sue Risorse, Universita di Genova, Italy, catalogue number M0480.
Associated Minerals at Type Locality:
BrauniteQuartzRhodonite
Reference:
Bindi, L., Carbone, C., Cabella, R., Lucchetti, G. (2011) Bassoite, SrV3O7·4H2O, a new mineral from Molinello mine, Val Graveglia, eastern Liguria, Italy. Mineralogical Magazine, 75 (5) 2677-2686 doi:10.1180/minmag.2011.075.5.2677

Synonyms of BassoiteHide

Other Language Names for BassoiteHide

Dutch:Bassoiet
German:Bassoit

Related Minerals - Strunz-mindat GroupingHide

4.H0.PomiteCa3[V4+5V5+10O37(CO3)] · 37H2OTric. 1 : P1
4.H0.PseudopomiteCa3.5[V4+6V5+9O37(CO3)] · 29H2OTric. 1 : P1

Other InformationHide

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 BassoiteHide

References for BassoiteHide

Localities for BassoiteHide

Showing 1 localities.

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
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Locality ListHide

- 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.
Italy (TL)
 
  • Liguria
    • Genoa
      • Ne
Bindi et al. (2011) +1 other reference
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