Teruggite
A valid IMA mineral species
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About Teruggite
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
GUID
(UUID V4):
(UUID V4):
3b3508ba-42e8-413d-a8b0-c52b95dbd55b
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 |
---|---|---|
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
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
Low
Dispersion:
relatively weak
Chemistry of Teruggite
Mindat Formula:
Ca4Mg[AsO4]2[B6O7(OH)6]2 · 12H2O
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:
Reference:
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 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
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).
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.
All localities listed without proper references should be considered as questionable.
Argentina (TL) | |
| A Summary and Geological Comparison. ... +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