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Stracherite
A valid IMA mineral species
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About Stracherite
Glenn B. Stracher
Formula:
BaCa6(SiO4)2[(PO4)(CO3)]F
Colour:
Colorless
Lustre:
Vitreous
Hardness:
5
Specific Gravity:
3.365 (Calculated)
Crystal System:
Trigonal
Member of:
Name:
Named in honor of Dr. Glenn Blair Stracher (b. 31 March 1949, Albany, New York, USA), Professor Emeritus of Geology at East Georgia State College. He is a world famous specialist in the field of geology associated with fossil fuel fires.
Type Locality:
The first carbonate-bearing member of the group. Unique combination of elements.
Unique Identifiers
Mindat ID:
51478
Long-form identifier:
mindat:1:1:51478:5
IMA Classification of Stracherite
Approved
Approval year:
2017
First published:
2019
Type description reference:
Galuskin, Evgeny V., Krüger, Biljana, Galuskina, Irina O., Krüger, Hannes, Vapnik, Yevgeny, Pauluhn, Anuschka, Olieric, Vincent (2018) Stracherite, BaCa6(SiO4)2[(PO4)(CO3)]F, the first CO3-bearing intercalated hexagonal antiperovskite from Negev Desert, Israel. American Mineralogist, 103 (10) 1699-1706 doi:10.2138/am-2018-6493
Classification of Stracherite
9.AH.40
9 : SILICATES (Germanates)
A : Nesosilicates
H : Nesosilicates with CO3, SO4, PO4, etc.
9 : SILICATES (Germanates)
A : Nesosilicates
H : Nesosilicates with CO3, SO4, PO4, etc.
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 |
|---|---|---|
| Stra | 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 Stracherite
Vitreous
Transparency:
Transparent
Colour:
Colorless
Streak:
White
Hardness:
5 on Mohs scale
Hardness:
VHN50=510(12) kg/mm2 - Vickers
Hardness Data:
Measured
Tenacity:
Brittle
Cleavage:
Imperfect/Fair
On (001)
On (001)
Parting:
Not observed
Fracture:
Irregular/Uneven
Density:
3.365 g/cm3 (Calculated)
Comment:
Too many inclusions to measure
Optical Data of Stracherite
Type:
Uniaxial (+)
RI values:
nω = 1.635(2) nε = 1.659(2)
Max. Birefringence:
δ = 0.024
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
Chemistry of Stracherite
Mindat Formula:
BaCa6(SiO4)2[(PO4)(CO3)]F
Element Weights:
Crystallography of Stracherite
Crystal System:
Trigonal
Class (H-M):
3m(32/m) - Hexagonal Scalenohedral
Space Group:
R3m
Setting:
R3m
Cell Parameters:
a = 7.0877(5) Å, c = 25.201(2) Å
Ratio:
a:c = 1 : 3.556
Unit Cell V:
1,096.37 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.544 Å | (66) |
| 3.265 Å | (39) |
| 3.105 Å | (43) |
| 3.047 Å | (82) |
| 2.800 Å | (42) |
| 2.709 Å | (100) |
| 1.948 Å | (36) |
| 1.772 Å | (54) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 10a: Neoproterozoic oxygenation/terrestrial biosphere | <0.6 |
| 51 : Pyrometamorphic minerals (see also #54 and #56) | <0.36 |
Type Occurrence of Stracherite
General Appearance of Type Material:
Poikilitic crystals to 0.5 mm in size
Place of Conservation of Type Material:
Collections of the Fersman Mineralogical Museum, Leninskiy pr., 18/к2, 115162 Moscow, Russia (catalogue number 4957/1)
Geological Setting of Type Material:
Re-crystallization zones of spurrite marbles under the influence of by-products of combustion metamorphism
Reference:
Galuskin, Evgeny V., Krüger, Biljana, Galuskina, Irina O., Krüger, Hannes, Vapnik, Yevgeny, Pauluhn, Anuschka, Olieric, Vincent (2018) Stracherite, BaCa6(SiO4)2[(PO4)(CO3)]F, the first CO3-bearing intercalated hexagonal antiperovskite from Negev Desert, Israel. American Mineralogist, 103 (10) 1699-1706 doi:10.2138/am-2018-6493
Synonyms of Stracherite
Other Language Names for Stracherite
Dutch:Stracheriet
German:Stracherit
Relationship of Stracherite to other Species
Member of:
Other Members of Zadovite Group:
Common Associates
Associations Based on Photo Data:
| 5 photos of Stracherite associated with Ariegilatite | BaCa12(SiO4)4(PO4)2F2O |
| 5 photos of Stracherite associated with Spurrite | Ca5(SiO4)2(CO3) |
| 2 photos of Stracherite associated with Brownmillerite | Ca2Fe3+AlO5 |
| 2 photos of Stracherite associated with Shulamitite | Ca3TiFe3+AlO8 |
| 2 photos of Stracherite associated with Elbrusite | Ca3(U6+0.5Zr1.5)[Fe3+O4]3 |
| 1 photo of Stracherite associated with Fluormayenite | Ca12Al14O32F2 |
Related Minerals - Strunz-mindat Grouping
| 9.AH. | Fluorbritholite-(Nd) | Ca2Nd3(SiO4)3F |
| 9.AH.05 | Iimoriite-(Y) | Y2[SiO4][CO3] |
| 9.AH.10 | Tundrite-(Ce) | Na2Ce2Ti(SiO4)(CO3)2O2 |
| 9.AH.10 | Tundrite-(Nd) | Na2(Nd,Ce)2Ti(SiO4)(CO3)2O2 |
| 9.AH.15 | Galuskinite | Ca7(SiO4)3(CO3) |
| 9.AH.15 | Spurrite | Ca5(SiO4)2(CO3) |
| 9.AH.20 | Ternesite | Ca5(SiO4)2(SO4) |
| 9.AH.20 | Silicocarnotite | Ca5[(SiO4)(PO4)](PO4) |
| 9.AH.25 | Britholite-(Ce) | (Ce,Ca)5(SiO4)3OH |
| 9.AH.25 | Britholite-(Y) | (Y,Ca)5(SiO4)3OH |
| 9.AH.25 | Mattheddleite | Pb5(SiO4)1.5(SO4)1.5(Cl,OH) |
| 9.AH.25 | Fluorbritholite-(Ce) | (Ce,Ca)5(SiO4)3F |
| 9.AH.25 | Fluorellestadite | Ca5(SiO4)1.5(SO4)1.5F |
| 9.AH.25 | Fluorbritholite-(La) | Ca2La3(SiO4)3F |
| 9.AH.25 | Fluorbritholite-(Y) | (Y,Ca)5(SiO4)3F |
| 9.AH.25 | Hydroxylellestadite | Ca5(SiO4)1.5(SO4)1.5(OH) |
| 9.AH.25 | 'Calciobritholite' | (Ca,Y)5(SiO4,PO4)3(OH) |
| 9.AH.25 | 'Britholite-(La)' | Ca2(La,Ce,Ca)3(SiO4,PO4)3(OH,F) |
| 9.AH.25 | Tritomite-(Ce) | Ce5(SiO4,BO4)3(OH,O) |
| 9.AH.25 | Tritomite-(Y) | Y5(SiO4,BO4)3(O,OH,F) |
| 9.AH.25 | Fluorcalciobritholite | (Ca,REE)5(SiO4,PO4)3F |
| 9.AH.25 | Chlorellestadite | Ca5(SiO4)1.5(SO4)1.5Cl |
| 9.AH.35 | Dargaite | BaCa12(SiO4)4(SO4)2O3 |
| 9.AH.35 | Nabimusaite | KCa12(SiO4)4(SO4)2O2F |
| 9.AH.40 | Zadovite | BaCa6[(SiO4)(PO4)](PO4)2F |
| 9.AH.40 | Gazeevite | BaCa6(SiO4)2(SO4)2O |
| 9.AH.45 | Flamite | Ca8-x(Na,K)x(SiO4)4-x(PO4)x |
| 9.AH.50 | Byzantievite | Ba5(Ca,REE,Y)22(Ti,Nb)18(SiO4)4[(PO4),(SiO4)]4(BO3)9O22[(OH),F]43(H2O)1.5 |
| 9.AH.55 | Greenwoodite | (Ba,V3+O)2V3+9(Fe3+,Fe2+)2Si2O22 |
| 9.AH.60 | Kihlmanite-(Ce) | Ce2TiO2(SiO4)(HCO3)2(H2O) |
| 9.AH.65 | Tsangpoite | Ca5(PO4)2(SiO4) |
| 9.AH.70 | 'Enalite' | (Th,REE,Al) [(PO4),(SiO4),(OH)] |
Fluorescence of Stracherite
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 Stracherite
mindat.org URL:
https://www.mindat.org/min-51478.html
Please feel free to link to this page.
Please feel free to link to this page.
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External Links:
Mineral Dealers:
References for Stracherite
Reference List:
Hålenius, U., Hatert, F., Pasero, M., Mills, S. J. (2017) New minerals and nomenclature modifications approved in 2017. CNMNC Newsletter No 36. Mineralogical Magazine, 81 (2) 403-409 doi:10.1180/minmag.2017.081.022
Galuskin, Evgeny V., Krüger, Biljana, Galuskina, Irina O., Krüger, Hannes, Vapnik, Yevgeny, Pauluhn, Anuschka, Olieric, Vincent (2018) Stracherite, BaCa6(SiO4)2[(PO4)(CO3)]F, the first CO3-bearing intercalated hexagonal antiperovskite from Negev Desert, Israel. American Mineralogist, 103 (10) 1699-1706 doi:10.2138/am-2018-6493
Localities for Stracherite
Showing 2 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.
Israel | |
| Krüger et al. (2018) +3 other references |
Middle East (TL) | |
| Mineralogical Magazine +2 other references |
Quick NavTopAbout StracheriteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography X-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesRelationshipsCommon AssociatesStrunz-MindatFluorescence Other InformationInternet Links References Localities Locality List
Hatrurim Formation, Middle East