Breyite
A valid IMA mineral species
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Gerhard P. Brey
Formula:
Ca3Si3O9
Colour:
Colorless
Lustre:
Vitreous
Specific Gravity:
3.072 (Calculated)
Crystal System:
Triclinic
Member of:
Name:
Named in honor of Gerhard Peter Brey, German mineralogist, petrologist, and professor at the Goethe-University of Frankfurt. He is an expert in the study of mineral inclusions in diamonds.
Type Locality:
Polymorph of:
Isostructural with:
Unique Identifiers
Mindat ID:
53167
Long-form identifier:
mindat:1:1:53167:6
IMA Classification of Breyite
Approved
First published:
2021
Classification of Breyite
9.CA.25
9 : SILICATES (Germanates)
C : Cyclosilicates
A : [Si3O9]6- 3-membered single rings (dreier-Einfachringe), without insular complex anions
9 : SILICATES (Germanates)
C : Cyclosilicates
A : [Si3O9]6- 3-membered single rings (dreier-Einfachringe), without insular complex anions
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 |
|---|---|---|
| Byi | 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 Breyite
Vitreous
Transparency:
Transparent
Colour:
Colorless
Cleavage:
None Observed
Parting:
None Observed
Density:
3.072 g/cm3 (Calculated)
Chemistry of Breyite
Mindat Formula:
Ca3Si3O9
Element Weights:
Elements listed:
Crystallography of Breyite
Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 6.6970(4) Å, b = 9.2986(7) Å, c = 6.6501(4) Å
α = 83.458(6)°, β = 76.226(6)°, γ = 69.581(7)°
α = 83.458(6)°, β = 76.226(6)°, γ = 69.581(7)°
Ratio:
a:b:c = 0.72 : 1 : 0.715
Unit Cell V:
376.72 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 4.91 Å | (16) |
| 3.13 Å | (29) |
| 3.02 Å | (100) |
| 2.89 Å | (80) |
| 2.61 Å | (45) |
| 2.53 Å | (19) |
| 1.79 Å | (18) |
| 1.66 Å | (20) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 4b: Highly evolved igneous rocks | >3.0 |
| 36 : Carbonatites, kimberlites, and related igneous rocks | |
| Stage 5: Initiation of plate tectonics | <3.5-2.5 |
| 39 : High-? metamorphism (blueschist, eclogite, ultrahigh ? facies) |
Type Occurrence of Breyite
General Appearance of Type Material:
An inclusion in diamond approximately 140 x 150 x 100 microns.
Place of Conservation of Type Material:
Mineralogical collections of the Museo di Mineralogia, University of Padova, Via Giotto 1, 35122 Padova, Italy, catalogue number MMP 20371.
Geological Setting of Type Material:
Super-deep-origin diamond.
Associated Minerals at Type Locality:
Synonyms of Breyite
Other Language Names for Breyite
Relationship of Breyite to other Species
Member of:
Other Members of Margarosanite Group:
| Anatolygurbanovite | SrCa2Si3O9 | Tric. 1 : P1 |
| Margarosanite | Ca2PbSi3O9 | Tric. 1 : P1 |
| Walstromite | BaCa2(Si3O9) | Tric. 1 : P1 |
Related Minerals - Strunz-mindat Grouping
| 9.CA. | UM1975-18-SiO:Mn | α-MnSiO3 |
| 9.CA.05 | Bazirite | BaZr(Si3O9) |
| 9.CA.05 | Benitoite | BaTi(Si3O9) |
| 9.CA.05 | Pabstite | Ba(Sn,Ti)(Si3O9) |
| 9.CA.10 | Wadeite | K2Zr(Si3O9) |
| 9.CA.15 | Calciocatapleiite | CaZr(Si3O9) · 2H2O |
| 9.CA.15 | Catapleiite | Na2Zr(Si3O9) · 2H2O |
| 9.CA.20 | Pseudowollastonite | CaSiO3 |
| 9.CA.25 | Margarosanite | Ca2PbSi3O9 |
| 9.CA.25 | Walstromite | BaCa2(Si3O9) |
| 9.CA.25 | Anatolygurbanovite | SrCa2Si3O9 |
| 9.CA.30 | Bobtraillite | (Na,◻)12(◻,Na)12Sr12Zr14(Si3O9)10[Si2BO7(OH)2]6 · 12H2O |
| 9.CA.35 | Rogermitchellite | Na6Sr12Ba2Zr13Si39B4O123(OH)6 · 20H2O |
Fluorescence of Breyite
Not fluorescent
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 Breyite
mindat.org URL:
https://www.mindat.org/min-53167.html
Please feel free to link to this page.
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Search Engines:
External Links:
References for Breyite
Reference List:
Hålenius, U., Hatert, F., Pasero, M., Mills, S. J. (2018) CNMNC Newsletter 45, New minerals and nomenclature modifications approved in 2018. Mineralogical Magazine, 82 (5) 1225-1232 doi:10.1180/mgm.2018.160p.1230
Woodland, Alan B., Girnis, Andrei V., Bulatov, Vadim K., Brey, Gerhard P., Höfer, Heidi E. (2020) Breyite inclusions in diamond: experimental evidence for possible dual origin. European Journal of Mineralogy, 32 (1) 171-185 doi:10.5194/ejm-32-171-2020
Localities for Breyite
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.
Brazil (TL) | |
| Zedgenizov et al. (2014) +1 other reference |
| Kaminsky et al. (2023) | |
Guinea | |
| Joswig et al. (1999) +1 other reference |
South Africa | |
| Daver et al. (2022) |
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