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Teruggite

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Big Photo

Loma Blanca borate deposit, Coranzuli, Susques Department, Jujuy, Argentina
© 2007, JGW




Formula:
Ca
 
4
Mg[AsO
 
4
|B
 
6
O
 
7
(OH)
 
6
]
 
2
 · 12H
 
2
O
System:MonoclinicColour:Colourless to white
Hardness:2½
Name:Named after Mario E. Teruggi, professor of geology, universidad nacional La Plata (Argentina).
This page provides mineralogical data about Teruggite.

Classification of Teruggite

IMA status:Approved 1968
Strunz 8th edition ID:5/H.18-10
Strunz 9th edition ID:6.FA.10
Nickel-Strunz 10th (pending) edition ID:6.FA.25

6 : BORATES
F : Hexaborates
A : Neso-hexaborates
Dana 8th edition ID:27.1.6.1

27 : COMPOUND BORATES
1 : Miscellaneous
Hey's CIM Ref.:10.2.3

10 : Borates with other anions
2 : Borates with phosphate or arsenate
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Type Occurrence of Teruggite

Type Locality:Loma Blanca borate deposit, Coranzuli, Susques Department, Jujuy, Argentina
Year of Discovery:1968

Physical Properties of Teruggite

Lustre:Vitreous
Diaphaneity (Transparency):Transparent
Colour:Colourless to white
Hardness (Mohs):2½

Crystallography of Teruggite

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

Optical Data of Teruggite

Type:Biaxial (+)
RI values: nα = 1.526 nβ = 1.528 nγ = 1.551
2V:Measured: 33° , Calculated: 34°
Maximum Birefringence:δ = 0.025

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Low
Dispersion:relatively weak

Chemical Properties of Teruggite

Formula:
Ca
 
4
Mg[AsO
 
4
|B
 
6
O
 
7
(OH)
 
6
]
 
2
 · 12H
 
2
O
Essential elements:As, B, Ca, H, Mg, O
All elements listed in formula:As, B, Ca, H, Mg, O

Relationship of Teruggite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
6.FA.05Aksaite
Mg[B
 
6
O
 
7
(OH)
 
6
] · 2H
 
2
O
6.FA.10Mcallisterite
Mg
 
2
[B
 
6
O
 
7
(OH)
 
6
]
 
2
 · 9H
 
2
O
6.FA.15Admontite
Mg[B
 
6
O
 
7
(OH)
 
6
] · 4H
 
2
O
6.FA.20Rivadavite
Na
 
6
Mg[B
 
6
O
 
7
(OH)
 
6
]
 
4
 · 10H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
10.2.1Lüneburgite
Mg
 
3
[B
 
2
(OH)
 
6
](PO
 
4
)
 
2
 · 6H
 
2
O
10.2.2Cahnite
Ca
 
2
[B(OH)
 
4
](AsO
 
4
)
10.2.4Seamanite
Mn
2+
3
[B(OH)
 
4
](PO
 
4
)(OH)
 
2

Other Names for Teruggite

Synonyms:
IMA1968-007
Other Languages:
German:Teruggit
Russian:Теруггит
Spanish:Teruggita

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Teruggite

Reference List:

- +
American Mineralogist (1968): 53: 1815-1827.

American Mineralogist (1973): 5: 1034-1043.

Canadian Mineralogist (1999): 37: 31-762.

Grew, E.S., and Anovitz, L.M. (1996) BORON: Mineralogy, Petrology and Geochemistry, second edition, as revised (2002).

Internet Links for Teruggite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Teruggite details from Handbook of Mineralogy (PDF)
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    • Localities for Teruggite

    Hide Locality List
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Argentina
     
    • Jujuy
      • Susques Department
        • Coranzuli
    		L.F. Aristarain, C.S. Hurlbut, Jr.: Amer. Mineral. 53:1815-1827 (1968)
    Chile
     
    • Antofagasta Region
    		MinMag 66:253
    Turkey
     
    • Aegean Region
      • 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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