Teruggite
A valid IMA mineral species
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About Teruggite
Mario E. Teruggi
Formula:
Ca4Mg[AsO4]2[B6O7(OH)6]2 · 12H2O
Colour:
Colourless to white
Lustre:
Vitreous
Hardness:
2½
Specific Gravity:
2.149 - 2.20
Crystal System:
Monoclinic
Name:
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.
Unique Identifiers
Mindat ID:
3917
Long-form identifier:
mindat:1:1:3917:4
IMA Classification of Teruggite
Approved
IMA Formula:
Ca4Mg[AsB6O11(OH)6]2 · 14H2O
Approval year:
1968
First published:
1968
Classification of Teruggite
6.FA.25
6 : BORATES
F : Hexaborates
A : Neso-hexaborates
6 : BORATES
F : Hexaborates
A : Neso-hexaborates
27.1.6.1
27 : COMPOUND BORATES
1 : Miscellaneous
27 : COMPOUND BORATES
1 : Miscellaneous
10.2.3
10 : Borates with other anions
2 : Borates with phosphate or arsenate
10 : Borates with other anions
2 : Borates with phosphate or arsenate
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Tgg | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Teruggite
Vitreous
Transparency:
Transparent
Colour:
Colourless to white
Hardness:
2½ on Mohs scale
Tenacity:
Brittle
Cleavage:
Distinct/Good
On {001}, good; on {110}, fair.
On {001}, good; on {110}, fair.
Density:
2.149 - 2.20 g/cm3 (Measured) 2.192 g/cm3 (Calculated)
Optical Data of Teruggite
Type:
Biaxial (+)
RI values:
nα = 1.526(1) nβ = 1.528(1) nγ = 1.551(1)
2V:
Measured: 33° , Calculated: 34°
Max. Birefringence:
δ = 0.025
Based on recorded range of RI values above.
Based on recorded range of RI values above.
Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars.
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars.
Surface Relief:
Moderate
Dispersion:
relatively weak
Chemistry of Teruggite
Mindat Formula:
Ca4Mg[AsO4]2[B6O7(OH)6]2 · 12H2O
Element Weights:
Crystallography of Teruggite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Setting:
P21/a
Cell Parameters:
a = 15.675(13) Å, b = 19.920(14) Å, c = 6.255(4) Å
β = 99.33(7)°
β = 99.33(7)°
Ratio:
a:b:c = 0.787 : 1 : 0.314
Unit Cell V:
1,927.26 ų (Calculated from Unit Cell)
Z:
2
Crystal Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0000390 | Teruggite | Dal Negro A, Kumbasar I, Ungaretti L (1973) The crystal structure of teruggite American Mineralogist 58 1034-1043 |  | 1973 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 12.13 Å | (100b) |
| 2.785 Å | (30) |
| 9.98 Å | (22b) |
| 3.577 Å | (22b) |
| 4.65 Å | (21b) |
| 8.37 Å | (20b) |
| 4.571 Å | (17) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Near-surface Processes | |
| 25 : Evaporites (prebiotic) |
Type Occurrence of Teruggite
General Appearance of Type Material:
white cauliflower-shaped nodules
Place of Conservation of Type Material:
Harvard University, Cambridge, Massachusetts, 109056; National Museum of Natural History, Washington, D.C., USA, 145925.
Associated Minerals at Type Locality:
Synonyms of Teruggite
Other Language Names for Teruggite
Related Minerals - Strunz-mindat Grouping
| 6.FA.05 | Aksaite | Mg[B6O7(OH)6] · 2H2O |
| 6.FA.10 | Mcallisterite | Mg2[B6O7(OH)6]2 · 9H2O |
| 6.FA.15 | Admontite | MgB6O10 · 7H2O |
| 6.FA.20 | Rivadavite | Na6Mg[B6O7(OH)6]4 · 10H2O |
Other Information
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 Teruggite
mindat.org URL:
https://www.mindat.org/min-3917.html
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Please feel free to link to this page.
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References for Teruggite
Reference List:
Aristarain, L. F., Hurlbut, C. S. (1968) Teruggite, 4CaO·MgO·6B2O3·As2O5·18H2O, a new mineral from Jujuy, Argentina. American Mineralogist, 53 (11-12) 1815-1827
Localities for Teruggite
Showing 3 localities.
symbol to view information about a locality.
The Locality List
- 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).
All localities listed without proper references should be considered as questionable.
Argentina (TL) | |
| Aristarain et al. (1968) +3 other references |
Chile | |
| MinMag 66:253 |
Turkey | |
| American Mineralogist +5 other references |
Quick NavTopAbout TeruggiteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography Crystal StructureX-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesStrunz-MindatOther InformationInternet Links References Localities Locality List
Loma Blanca borate deposit, Coranzuli, Susques Department, Jujuy Province, Argentina