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Dellagiustaite

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About DellagiustaiteHide

Formula:
V2+Al2O4
Colour:
black
Lustre:
Metallic
Hardness:
6½ - 7
Specific Gravity:
4.6 (Calculated)
Crystal System:
Isometric
Name:
Named in honor of Professor Antonio Della Giusta (University of Padova, Italy, born 1941), an expert on the crystal chemistry and cation order-disorder phenomena in spinel group minerals.
Structure determined. Interesting due to the occurrence of divalent vanadium (although likely not unique in this matter - compare sulvanite).


Classification of DellagiustaiteHide

Approved
Approval Year:
2018
First Published:
2018

Physical Properties of DellagiustaiteHide

Metallic
Transparency:
Opaque
Colour:
black
Streak:
black
Hardness:
6½ - 7 on Mohs scale
Tenacity:
Brittle
Cleavage:
None Observed
Parting:
Irregular and conchoidal
Fracture:
Irregular/Uneven, Splintery
Density:
4.6 g/cm3 (Calculated)

Optical Data of DellagiustaiteHide

Type:
Isotropic
Reflectivity:
471.1nmR=14%
548.3nmR=13.8%
586.6nmR=13.6%
652.3nmR=13.7%

Reflectance graph
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 14%.
Colour in reflected light:
Light grey

Chemical Properties of DellagiustaiteHide

Formula:
V2+Al2O4

Crystallography of DellagiustaiteHide

Crystal System:
Isometric
Class (H-M):
m3m (4/m 3 2/m) - Hexoctahedral
Space Group:
Fd3m
Setting:
Fd3m
Cell Parameters:
a = 8.1950(1) Å
Unit Cell V:
550.36 ų (Calculated from Unit Cell)

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
2.469Å(19)
2.047Å(58)
1.576Å(38)
1.447Å(100)
1.182Å(27)
1.023Å(87)
0.915Å(21)
0.836Å(35)
Comments:
From Type Description.

Type Occurrence of DellagiustaiteHide

General Appearance of Type Material:
Black crystals with idiomorphic morphology
Place of Conservation of Type Material:
Type material is deposited in the mineralogical collections of the Museo delle Collezioni di Mineralogia, Gemmologia, Petrologia e Giacimentologia, Dipartimento di Scienze della Terra “A. Desio”, Università di Milano, catalogue number MCMGPG-H2017-001
Associated Minerals at Type Locality:
Reference:
Cámara, F., Bindi, L., Pagano, A., Pagano, R., Gain, S.E.M., Griffin, W.L. (2019): Dellagiustaite: A Novel Natural Spinel Containing V2+. Minerals, 9, 4; https://doi.org/10.3390/min9010004

Synonyms of DellagiustaiteHide

Relationship of Dellagiustaite to other SpeciesHide

Other Members of this group:
ChromiteFe2+Cr3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
Cochromite(Co,Ni,Fe)(Cr,Al)2O4Iso. m3m (4/m 3 2/m) : Fd3m
CoulsoniteFe2+V3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
CuprospinelCu2+Fe3+2O4Iso.
Deltalumite(Al0.670.33)Al2O4Tet. 4 2m : P4m2
FrankliniteZn2+Fe3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
GahniteZnAl2O4Iso. m3m (4/m 3 2/m) : Fd3m
GalaxiteMn2+Al2O4Iso. m3m (4/m 3 2/m) : Fd3m
GuiteCo2+Co3+2O4Iso.
HausmanniteMn2+Mn3+2O4Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
HercyniteFe2+Al2O4Iso. m3m (4/m 3 2/m) : Fd3m
HetaeroliteZnMn2O4Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
JacobsiteMn2+Fe3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
Maghemite(Fe3+0.670.33)Fe3+2O4Iso. 4 3 2 : P41 3 2
MagnesiochromiteMgCr2O4Iso. m3m (4/m 3 2/m) : Fd3m
MagnesiocoulsoniteMgV2O4Iso.
MagnesioferriteMgFe3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
MagnetiteFe2+Fe3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
ManganochromiteMn2+Cr2O4Iso. m3m (4/m 3 2/m) : Fd3m
Nichromite(Ni,Co,Fe)(Cr,Fe,Al)2O4Iso. m3m (4/m 3 2/m) : Fd3m
SpinelMgAl2O4Iso. m3m (4/m 3 2/m) : Fd3m
ThermaerogeniteCuAl2O4Iso. m3m (4/m 3 2/m) : Fd3m
Titanomaghemite(Ti4+0.50.5)Fe2O4Iso. 4 3 2 : P43 3 2
TrevoriteNi2+Fe3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
VuorelaineniteMn2+V3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
XieiteFe2+Cr2O4Orth. mmm (2/m 2/m 2/m)
ZincochromiteZnCr2O4Iso.

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.

References for DellagiustaiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Cámara, F., Pagano, R., Pagano, A. and Bindi, L. (2018) Dellagiustaite, IMA 2017- 101. CNMNC Newsletter No. 42, April 2018, page 446; Mineralogical Magazine: 82: 445–451.
Cámara, F., Bindi, L., Pagano, A., Pagano, R., Gain, S.E.M., Griffin, W.L. (2019): Dellagiustaite: A Novel Natural Spinel Containing V2+. Minerals, 9, 4; https://doi.org/10.3390/min9010004

Internet Links for DellagiustaiteHide

Localities for DellagiustaiteHide

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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Argentina
 
  • San Luis Province
Cámara, F., Pagano, R., Pagano, A. and Bindi, L. (2018) Dellagiustaite, IMA 2017- 101. CNMNC Newsletter No. 42, April 2018, page 446; Mineralogical Magazine: 82: 445–451; Cámara, F., Bindi, L., Pagano, A., Pagano, R., Gain, S.E.M., Griffin, W.L. (2019): Dellagiustaite: A Novel Natural Spinel Containing V2+. Minerals, 9, 4; https://doi.org/10.3390/min9010004
Cámara, F., Bindi, L., Pagano, A., Pagano, R., Gain, S.E.M., Griffin, W.L. (2019): Dellagiustaite: A Novel Natural Spinel Containing V2+. Minerals, 9, 4; https://doi.org/10.3390/min9010004
Israel
 
  • Haifa District
    • Mount Carmel
Cámara, F., Bindi, L., Pagano, A., Pagano, R., Gain, S.E.M., Griffin, W.L. (2019): Dellagiustaite: A Novel Natural Spinel Containing V2+. Minerals, 9, 4; https://doi.org/10.3390/min9010004
 
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