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About TeruggiteHide

Mario E. Teruggi
Ca4Mg[AsO4]2[B6O7(OH)6]2 · 12H2O
Colourless to white
Specific Gravity:
Crystal System:
Named in honor of Mario Egidio Teruggi (18 February 1919, Dolores, Argentina - 22 August 2002, La Plata, Argentina), professor of Geology, Universidad Nacional La Plata, Argentina. He made significant contributions to the sedimentology and petrology of Argentina. Pronounced tay-roo-gite.
This page provides mineralogical data about Teruggite.

Classification of TeruggiteHide

Approval Year:
First Published:

F : Hexaborates
A : Neso-hexaborates

1 : Miscellaneous

10 : Borates with other anions
2 : Borates with phosphate or arsenate

Physical Properties of TeruggiteHide

Colourless to white
2½ on Mohs scale
2.149 g/cm3 (Measured)    2.139 g/cm3 (Calculated)

Optical Data of TeruggiteHide

Biaxial (+)
RI values:
nα = 1.526 nβ = 1.528 nγ = 1.551
Measured: 33° , Calculated: 34°
Max Birefringence:
δ = 0.025
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
relatively weak

Chemical Properties of TeruggiteHide

Ca4Mg[AsO4]2[B6O7(OH)6]2 · 12H2O
IMA Formula:
Ca4Mg[AsB6O11(OH)6]2 · 14H2O

Crystallography of TeruggiteHide

Crystal System:
Cell Parameters:
a = 15.68 Å, b = 19.9 Å, c = 6.25 Å
β = 100.05°
a:b:c = 0.788 : 1 : 0.314
Unit Cell V:
1,920.28 ų (Calculated from Unit Cell)

Type Occurrence of TeruggiteHide

General Appearance of Type Material:
white cauliflower-shaped nodules
Aristarain, L.F., Hurlut, C.S. (1968) Teruggite, 4CaO·MgO·6B2O3·As2O5·18H2O, a new mineral from Jujuy, Argentina. American Mineralogist: 53: 1815-1827.

Synonyms of TeruggiteHide

Other Language Names for TeruggiteHide


Related Minerals - Nickel-Strunz GroupingHide

6.FA.05AksaiteMg[B6O7(OH)6] · 2H2OOrth. mmm (2/m 2/m 2/m) : Pbca
6.FA.10McallisteriteMg2[B6O7(OH)6]2 · 9H2OTrig. 3m (3 2/m) : R3c
6.FA.15AdmontiteMgB6O10 · 7H2OMon.
6.FA.20RivadaviteNa6Mg[B6O7(OH)6]4 · 10H2OMon. 2/m : P21/m

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

10.2.1LüneburgiteMg3[B2(OH)6](PO4)2 · 6H2OTric.
10.2.2CahniteCa2[B(OH)4](AsO4)Tet. 4 : P4
10.2.4SeamaniteMn2+3[B(OH)4](PO4)(OH)2Orth. mmm (2/m 2/m 2/m)

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 TeruggiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Aristarain, L.F., Hurlut, C.S. (1968) Teruggite, 4CaO·MgO·6B2O3·As2O5·18H2O, a new mineral from Jujuy, Argentina. American Mineralogist: 53: 1815-1827.
Negro, A.D., Kumbasar, I., Ungaretti, L. (1973) The crystal structure of teruggite. American Mineralogist: 58: 1034-1043.
Grice, J.D., Burns, P.C., Hawthorne, F.C. (1999) Borate minerals. II. A hierarchy of structures based upon the borate fundamental building block. The Canadian Mineralogist: 37: 731-762.
Grew, E.S., and Anovitz, L.M. (1996) BORON: Mineralogy, Petrology and Geochemistry, second edition, as revised (2002).

Internet Links for TeruggiteHide

Localities for TeruggiteHide

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 (TL)
  • Jujuy Province
    • Susques Department
      • Coranzuli
L.F. Aristarain, C.S. Hurlbut, Jr.: Amer. Mineral. 53:1815-1827 (1968); Alonso, R. N. (1999). On the origin of La Puna borates. Acta geológica hispánica, 34(2), 141-166.; CAHIT HELVACI & RICARDO N. ALONSO (2000) Borate Deposits of Turkey and Argentina; A Summary and Geological Comparison. Turkish Journal of Earth Sciences, 9:1-27.
  • Antofagasta
    • El Loa Province
MinMag 66:253
  • Kütahya Province
    • Emet
      • Emet Borate deposit
J.W. Anthony, R.A. Bideaux, K.W. Bladh, M.C. Nichols: Handbook of Mineralogy, Vol. V (2003); American Mineralogist; April 1979; v. 64; no. 3-4; p. 362-366
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