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Cassagnaite

A valid IMA mineral species
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05021270017271949589623.jpg
Cassagnaite

Cassagna Mine, Ne, Genoa, Liguria, Italy
01685090017271949592318.jpg
Cassagnaite

Cassagna Mine, Ne, Genoa, Liguria, Italy
05661910017271949599551.jpg
Cassagnaite

Cassagna Mine, Ne, Genoa, Liguria, Italy
05021270017271949589623.jpg
Cassagnaite

Cassagna Mine, Ne, Genoa, Liguria, Italy
01685090017271949592318.jpg
Cassagnaite

Cassagna Mine, Ne, Genoa, Liguria, Italy
05661910017271949599551.jpg
Cassagnaite

Cassagna Mine, Ne, Genoa, Liguria, Italy
05021270017271949589623.jpg
Cassagnaite

Cassagna Mine, Ne, Genoa, Liguria, Italy
01685090017271949592318.jpg
Cassagnaite

Cassagna Mine, Ne, Genoa, Liguria, Italy
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About CassagnaiteHide

08647830017271949591590.jpg
Cassagna

Cassagna Mine, Ne, Genoa, Liguria, Italy
Formula:
(Ca,Mn2+)4(Fe3+,Mn3+,Al)4(V3+,Mg,Al)2(Si3O10)(SiO4)2(OH,O)8
Colour:
Golden brown
Lustre:
Vitreous
Specific Gravity:
3.22 (Calculated)
Crystal System:
Orthorhombic
Name:
Named by R. Basso, C. Carbone, and A. Palenzona in 2008 after the type locality, the Cassagna Mine, Graveglia Valley, Ne, Genova Province, Liguria, Italy.
This page provides mineralogical data about Cassagnaite.


Unique IdentifiersHide

Mindat ID:
31591
Long-form identifier:
mindat:1:1:31591:7

IMA Classification of CassagnaiteHide

Classification of CassagnaiteHide

Strunz-mindat (2026):
9.BJ.65

9 : SILICATES (Germanates)
B : Sorosilicates
J : Sorosilicates with Si3O10, Si4O11, etc. anions; cations in octahedral [6] and greater coordination

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

Physical Properties of CassagnaiteHide

Lustre:
Vitreous
Transparency:
Transparent
Colour:
Golden brown
Streak:
Nearly white
Tenacity:
Brittle
Density:
3.22 g/cm3 (Calculated)

Chemistry of CassagnaiteHide

Mindat Formula:
(Ca,Mn2+)4(Fe3+,Mn3+,Al)4(V3+,Mg,Al)2(Si3O10)(SiO4)2(OH,O)8
Element Weights:
Element% weight
O39.616 %
Fe21.273 %
Ca15.267 %
Si13.373 %
V9.703 %
H0.768 %

Calculated from ideal end-member formula.
O
Fe
Ca
Si
V
H
Elements listed:
Al, Ca, Fe, H, Mg, Mn, O, Si, V - search for minerals with similar chemistry

Crystallography of CassagnaiteHide

Crystal System:
Orthorhombic
Class (H-M):
mmm(2/m2/m2/m) - Dipyramidal
Space Group:
Cmcm
Cell Parameters:
a = 6.066(1) Å, b = 8.908(1) Å, c = 18.995(2) Å
Ratio:
a:b:c = 0.681 : 1 : 2.132
Unit Cell V:
1,026.41 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Prism {011} and the pinacoids {001} and {100}.

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0007254CassagnaiteBasso R, Carbone C, Palenzona A (2008) Cassagnaite, a new, V-bearing silicate mineral from the Cassagna mine, northern Apennines, Italy European Journal of Mineralogy 20 95-1002008Cassagna mine, northern Apennines, Liguria, Italy0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
9.52 Å(100)
2.66 Å(70)
2.54 Å(65)
4.85 Å(50)
4.98 Å(45)
4.03 Å(40)
2.32 Å(40)

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
High-? alteration and/or metamorphism
32 : Ba/Mn/Pb/Zn deposits, including metamorphic deposits

Type Occurrence of CassagnaiteHide

Type Locality:
ⓘ Cassagna Mine, Ne, Genoa, Liguria, Italy
General Appearance of Type Material:
Fracture fillings in braunite + quartz layered mineralizations. Very rare isolated prismatic to tabular crystals < 0.06 mm. A few crystal aggregates to 1 mm.
Place of Conservation of Type Material:
Dipartimento per lo Studio del Territorio e delle sue Risorse (Dip.Te.Ris), University of Genoa, Italy.
Geological Setting of Type Material:
Hydrothermal alteration of braunite-bearing layered mineralization and metacherts.
Associated Minerals at Type Locality:
BraunitePiemontiteQuartz
Reference:
Basso, Riccardo, Carbone, Cristina, Palenzona, Andrea (2008) Cassagnaite, a new, V-bearing silicate mineral from the Cassagna mine, northern Apennines, Italy. European Journal of Mineralogy, 20 (1) 95-100 doi:10.1127/0935-1221/2007/0019-1777

Synonyms of CassagnaiteHide

Other Language Names for CassagnaiteHide

German:Cassagnait
Simplified Chinese:羟硅钒铁钙石

Common AssociatesHide

Associations Based on Photo Data:
1 photo of Cassagnaite associated with Piemontite(CaCa)(AlAlMn3+)O[Si2O7][SiO4](OH)
1 photo of Cassagnaite associated with QuartzSiO2

Related Minerals - Strunz-mindat GroupingHide

9.BJ.ArsenmedaiteMn2+6 As5+Si5O18(OH)Mon. 2/m : P21/c
9.BJ.05OrientiteCa8Mn3+10(SiO4)3(Si3O10)3(OH)10 · 4H2O Orth. mmm(2/m2/m2/m)
9.BJ.10RosenhahniteHCa3[Si3O9(OH)]Tric. 1 : P1
9.BJ.15TrabzoniteCa4(Si3O9)(OH)2Orth. mm2 : Ama2
9.BJ.20Thalénite-(Y)Y3Si3O10FMon. 2/m : P21/c
9.BJ.25TiragalloiteMn2+4As5+Si3O12(OH)Mon. 2/m : P21/c
9.BJ.30MedaiteMn2+6V5+Si5O18(OH)Mon. 2/m : P21/c
9.BJ.35StrontioruiziteSr2Mn3+2Si4O11(OH)4 · 2H2OMon. 2 : B2
9.BJ.35RuiziteCa2Mn3+2[Si4O11(OH)2](OH)2 · 2H2OMon. 2
9.BJ.35Taniajacoite SrCaMn3+2Si4O11(OH)4 · 2H2OTric. 1
9.BJ.40Ardennite-(As)Mn2+4Al4(AlMg)(AsO4)(SiO4)2(Si3O10)(OH)6Orth. mmm(2/m2/m2/m)
9.BJ.40KannaniteCa4Al4(AlMg)(VO4)(SiO4)2(Si3O10)(OH)6Orth. mmm(2/m2/m2/m) : Pmmn
9.BJ.40AlpeiteCa4Mn3+2Al2(Mn3+Mg)(SiO4)2(Si3O10)(V5+O4)(OH)6Orth. mmm(2/m2/m2/m) : Pmmn
9.BJ.40Ardennite-(V)Mn2+4Al4(AlMg)(VO4)(SiO4)2(Si3O10)(OH)6Orth. mmm(2/m2/m2/m) : Pmmn
9.BJ.45KilchoaniteCa6(SiO4)(Si3O10)Orth. mmm(2/m2/m2/m)
9.BJ.50Prismatine(◻,Fe,Mg)(Mg,Al,Fe)5Al4Si2(Si,Al)2(B,Si,Al)(O,OH,F)22Orth. mmm(2/m2/m2/m) : Cmcm
9.BJ.50KornerupineMg3Al6(Si,Al,B)5O21(OH)Orth. mmm(2/m2/m2/m) : Cmcm
9.BJ.55ZunyiteAl13Si5O20(OH,F)18ClIso. 43m : F43m
9.BJ.60HubeiteCa2Mn2+Fe3+Si4O12(OH) · 2H2OTric. 1 : P1
9.BJ.70PavlovskyiteCa8(SiO4)2(Si3O10)Orth. mmm(2/m2/m2/m) : Pbcn

Fluorescence of CassagnaiteHide

In UV light:
Not fluorescent

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 CassagnaiteHide

References for CassagnaiteHide

Localities for CassagnaiteHide

Showing 3 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
Basso et al. (2008) +1 other reference
    • La Spezia Province
      • Borghetto di Vara
Castellaro-Kampf
Spain
 
  • Canary Islands
    • Santa Cruz de Tenerife Province
      • Tenerife
Dill et al. (2023)
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