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Breyite

A valid IMA mineral species
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04724640017755553708989.jpg
Breyite, etc.

São Luis river alluvials, Juína, Mato Grosso, Brazil
04724640017755553708989.jpg
Breyite, etc.

São Luis river alluvials, Juína, Mato Grosso, Brazil
04724640017755553708989.jpg
Breyite, etc.

São Luis river alluvials, Juína, Mato Grosso, Brazil
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About BreyiteHide

06150550017272473156909.jpg
Gerhard P. Brey
Formula:
Ca3Si3O9
Colour:
Colorless
Lustre:
Vitreous
Specific Gravity:
3.072 (Calculated)
Crystal System:
Triclinic
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.
Isostructural with:
Margarosanite, Walstromite
Walstromite-type high-pressure phase, found as an inclusion in a diamond.


Unique IdentifiersHide

Mindat ID:
53167
Long-form identifier:
mindat:1:1:53167:6

Similar NamesHide

BerryiteA valid IMA mineral speciesCu3Ag2Pb3Bi7S16
BryoîdeA synonym of Pyromorphite
UreyiteA synonym of Kosmochlor

IMA Classification of BreyiteHide

Classification of BreyiteHide

Strunz-mindat (2026):
9.CA.25

9 : SILICATES (Germanates)
C : Cyclosilicates
A : [Si3O9]6- 3-membered single rings (dreier-Einfachringe), without insular complex anions

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference for Standard
ByiIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of BreyiteHide

Lustre:
Vitreous
Transparency:
Transparent
Colour:
Colorless
Cleavage:
None Observed
Parting:
None Observed
Density:
3.072 g/cm3 (Calculated)

Chemistry of BreyiteHide

Mindat Formula:
Ca3Si3O9
Element Weights:
Element% weight
O41.320 %
Ca34.502 %
Si24.178 %

Calculated from ideal end-member formula.
O
Ca
Si
Elements listed:
Ca, O, Si - search for minerals with similar chemistry

Crystallography of BreyiteHide

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)°
Ratio:
a:b:c = 0.72 : 1 : 0.715
Unit Cell V:
376.72 ų (Calculated from Unit Cell)

X-Ray Powder DiffractionHide

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest 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 BreyiteHide

Type Locality:
ⓘ São Luis river alluvials, Juína, Mato Grosso, Brazil
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:
Diamond
Reference:
Brenker, Frank E., Nestola, Fabrizio, Brenker, Lion, Peruzzo, Luca, Harris, Jeffrey W. (2021) Origin, properties, and structure of breyite: The second most abundant mineral inclusion in super-deep diamonds. American Mineralogist, 106 (1). 38-43 doi:10.2138/am-2020-7513

Synonyms of BreyiteHide

Other Language Names for BreyiteHide

Dutch:Breyiet
German:Breyit

Relationship of Breyite to other SpeciesHide

Member of:
Margarosanite Group
Other Members of Margarosanite Group:
AnatolygurbanoviteSrCa2Si3O9Tric. 1 : P1
MargarosaniteCa2PbSi3O9Tric. 1 : P1
WalstromiteBaCa2(Si3O9)Tric. 1 : P1

Common AssociatesHide

Associations Based on Photo Data:
1 photo of Breyite associated with PerovskiteCaTiO3
1 photo of Breyite associated with GraphiteC
1 photo of Breyite associated with DiamondC

Related Minerals - Strunz-mindat GroupingHide

9.CA.'UM1975-18-SiO:Mn'α-MnSiO3Tric.
9.CA.RaudseppiteBa2Ca7(Si3O9)2(CO3)2Cl2Tric. 1 : P1
9.CA.KopyloviteK2Ti(Si3O9)Hex. 6/m : P63/m
9.CA.05BaziriteBaZr(Si3O9)Hex. 6m2 : P6c2
9.CA.05BenitoiteBaTi(Si3O9)Hex. 6m2 : P62c
9.CA.05PabstiteBa(Sn,Ti)(Si3O9)Hex. 6m2 : P6c2
9.CA.10WadeiteK2Zr(Si3O9)Hex. 6/m : P63/m
9.CA.15CalciocatapleiiteCaZr(Si3O9) · 2H2OOrth. mmm(2/m2/m2/m)
9.CA.15CatapleiiteNa2Zr(Si3O9) · 2H2OMon.
9.CA.20PseudowollastoniteCaSiO3Mon. 2/m : B2/b
9.CA.25MargarosaniteCa2PbSi3O9Tric. 1 : P1
9.CA.25WalstromiteBaCa2(Si3O9)Tric. 1 : P1
9.CA.25AnatolygurbanoviteSrCa2Si3O9Tric. 1 : P1
9.CA.30Bobtraillite(Na,◻)12(◻,Na)12Sr12Zr14(Si3O9)10[Si2BO7(OH)2]6 · 12H2OTrig. 3m(32/m) : P31c
9.CA.35RogermitchelliteNa6Sr12Ba2Zr13Si39B4O123(OH)6 · 20H2OHex. 6mm : P63cm

Fluorescence of BreyiteHide

In UV light:
Not fluorescent

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.

Internet Links for BreyiteHide

References for BreyiteHide

Reference List:
Dera, P., Rapp, R., Chornkrathok, S., Zhang, D., Prakapenka, V.B., Woźniak, K. (2023). New high-pressure phase of CaSiO3 wollastonite with penta-coordinated silicon. 9th Meeting of the Mineralogical Society of Poland / 28th Meeting of the Petrology group of the Mineralogical Society of Poland, "Oceanic lithosphere: rocks, minerals, and critical resources", October 19-22, Bielawa, Poland. Mineralogia - Special Papers, 51, 51.
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
Höfer, H. (2019) Ca-Silikat-Einschluss in Diamant benannt nach Gerhard Brey. GMIT: 75: 60. (in German)
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
(2021) Breyite. Handbook of Mineralogy. Mineralogical Society of America
Brenker, Frank E., Nestola, Fabrizio, Brenker, Lion, Peruzzo, Luca, Harris, Jeffrey W. (2021) Origin, properties, and structure of breyite: The second most abundant mineral inclusion in super-deep diamonds. American Mineralogist, 106 (1). 38-43 doi:10.2138/am-2020-7513
Pushcharovsky, D. Yu. (2023) Structural Transformations of Minerals in the Earth’s Mantle: the New High Pressure Polymorphous Modifications of Olivine and Wollastonite. Zapiski RMO (Proceedings of the Russian Mineralogical Society) 5, 66-82 doi:10.31857/s0869605523050064

Localities for BreyiteHide

Showing 4 localities.

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.
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Locality ListHide

- 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.
Brazil (TL)
 
  • Mato Grosso
    • Juína
Zedgenizov et al. (2014) +1 other reference
Kaminsky et al. (2023)
Guinea
 
  • Kankan Region
    • Kankan Prefecture
Joswig et al. (1999) +1 other reference
South Africa
 
  • Gauteng
    • City of Tshwane Metropolitan Municipality
      • Cullinan
Petra Diamonds Ltd
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