Epidote-(Sr) (original) (raw)

A valid IMA mineral species

About Epidote-(Sr)Hide

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Formula:

(CaSr)(AlAlFe3+)O[Si2O7][SiO4](OH)

Crystal System:

Monoclinic

Name:

Named in 2008 by T. Minakawa, H. Fukushima, D. Nishio-Hamane and H. Miura for the chemical relationship to epidote.

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:31558:2

d0debe89-0ea2-4bef-9853-d2dca1533e80

IMA Classification of Epidote-(Sr)Hide

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IMA Formula:

CaSr(Al2Fe3+)[Si2O7][SiO4]O(OH)

Classification of Epidote-(Sr)Hide

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9.BG.05a

9 : SILICATES (Germanates)
B : Sorosilicates
G : Sorosilicates with mixed SiO4 and Si2O7 groups; cations in octahedral [6] and greater coordination

58.2.2.3

58 : SOROSILICATES Insular, Mixed, Single, and Larger Tetrahedral Groups
2 : Insular, Mixed, Single, and Larger Tetrahedral Groups with cations in [6] and higher coordination; single and double groups (n = 1, 2)

Mineral SymbolsHide

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

Physical Properties of Epidote-(Sr)Hide

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Cleavage:

Perfect
parallel to {001}

Optical Data of Epidote-(Sr)Hide

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RI values:

_n_α = 1.737(2) _n_β = 1.780(2) _n_γ = 1.792(2)

δ = 0.055

Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.

Colour in reflected light:

pale reddish brown to brown

Comments:

X: pale greenish yellow, and Y = Z: pale reddish brown to brownish pink

Chemistry of Epidote-(Sr)Hide

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Mindat Formula:

(CaSr)(AlAlFe3+)O[Si2O7][SiO4](OH)

Chemical AnalysisHide

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Crystallography of Epidote-(Sr)Hide

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Crystal System:

Monoclinic

Class (H-M):

2/m - Prismatic

Cell Parameters:

a = 8.928(5) Å, b = 5.652(1) Å, c = 10.244(5) Å
β = 114.46(4)°

Ratio:

a:b:c = 1.58 : 1 : 1.812

Crystal StructureHide

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X-Ray Powder DiffractionHide

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Powder Diffraction Data:

Geological EnvironmentHide

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Type Occurrence of Epidote-(Sr)Hide

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General Appearance of Type Material:

prismatic crystals up to 1 cm in length

Place of Conservation of Type Material:

Museum at the Hokkaido University, Sapporo, Japan (specimen no. Mineral-07400)

Associated Minerals at Type Locality:

Synonyms of Epidote-(Sr)Hide

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Other Language Names for Epidote-(Sr)Hide

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Relationship of Epidote-(Sr) to other SpeciesHide

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Other Members of this group:

Common AssociatesHide

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Associated Minerals Based on Photo Data:

Related Minerals - Strunz-mindat GroupingHide

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Other InformationHide

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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 Epidote-(Sr)Hide

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References for Epidote-(Sr)Hide

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Reference List:

Minakawa, Tetsuo, Fukushima, Hiroyuki, Nishio-Hamane, Daisuke, Miura, Hiroyuki (2008) Epidote-(Sr), CaSrAl2Fe3+(Si2O7)(SiO4)(OH), a new mineral from the Ananai mine, Kochi Prefecture, Japan. Journal of Mineralogical and Petrological Sciences, 103 (6) 400-406 doi:10.2465/jmps.071220

Kropáč, Kamil, Dolníček, Zdeněk, Uher, Pavel, Buriánek, David, Urubek, Tomáš (2024) Crystal chemistry and origin of epidote-(Sr) in alkaline rocks of the teschenite association (Silesian Unit, Outer Western Carpathians, Czech Republic) Mineralogy and Petrology, 118 (1) 55-70 doi:10.1007/s00710-023-00847-w

Localities for Epidote-(Sr)Hide

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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.

Locality ListHide

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- 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.