Epidote-(Sr) Mineral Data

General Epidote-(Sr) Information

Chemical Formula:

CaSrAl2Fe+++(Si2O7)(SiO4)O(OH)

Composition:

Molecular Weight = 530.76 gm

Strontium 16.51 % Sr 19.52 % SrO

Calcium 7.55 % Ca 10.57 % CaO

Aluminum 10.17 % Al 19.21 % Al₂O₃

Iron 10.52 % Fe 15.04 % Fe₂O₃

Silicon 15.87 % Si 33.96 % SiO₂

Hydrogen 0.19 % H 1.70 % H₂O

Oxygen 39.19 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

CaSrAl₂Fe³⁺(Si₂O₇)(SiO₄)O(OH)

Environment:

Epidote group

IMA Status:

Proposed IMA 2006 (Dana # Added)

Locality:

Ananai mine, Ohotoyo town, Kochi Prefecture, Japan Link to MinDat.org Location Data.

Name Origin:

Commission on New Minerals, Nomenclature and Classification (CNMNC)

Name Pronunciation:

Epidote-(Sr)

Synonym:

IMA2006-055

Epidote-(Sr) Image

Images:

Epidote-(Sr) Tinzenite

Comments: B&W image of a radial aggregate of epidote-(Sr) in tinzenite. (Journal of Mineralogical and Petrological Sciences, v103:400).
Location: Nagakawara and Hohnomori deposits at the Ananai mine, Kochi Prefecture, Japan. Scale: See Image.
© Journal of Mineralogical and Petrological Sciences

Epidote-(Sr) Crystallography

Axial Ratios:

a:b:c =1.5793:1:1.8125

Cell Dimensions:

a = 8.925, b = 5.651, c = 10.243, Z = 2; beta = 114.45° V = 470.28 Den(Calc)= 3.75

Crystal System:

Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 2₁/m

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 2.921(1), 2.58(0.49), 2.614(0.42),3.5(0.42), 2.724(0.41), 2.825(0.32), 3.262(0.23), 2.181(0.22),

Optical Properties of Epidote-(Sr)

Optical Data:

NCalc= 1.8 - from Gladstone-Dale relationship (KC = 0.2141) where Ncalc=Dcalc*KC+1

Calculated Properties of Epidote-(Sr)

Electron Density:

Bulk Density (Electron Density)=3.63 gm/cc
note: Specific Gravity of Epidote-(Sr) =3.75 gm/cc.

Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Photoelectric:

PE_Epidote-(Sr)= 23.05 barns/electron
U=PE_Epidote-(Sr) x rElectron Density= 83.72 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Epidote-(Sr) is Not Radioactive

Epidote-(Sr) Classification

Dana Class:

58.02.01a.11 (58)Sorosilicate Insular, Mixed, Single, and Larger Tetrahedral Groups

(58.02)with cations in [6] and higher coordination; single and double groups (n=1,2)

(58.02.01a)Epidote group (Clinozoisite subgroup)

58.02.01a.01 Clinozoisite! Ca2Al3(SiO4)3(OH)=Ca2AlAl2(SiO4)(Si2O7)O(OH) P 2₁/m 2/m

58.02.01a.02 Epidote! Ca2(Fe,Al)3(SiO4)3(OH)=Ca2(Fe,Al)Al2(SiO4)(Si2O7)O(OH) P 2₁/m 2/m

58.02.01a.03 Epidote-(Pb)! (Ca,Pb,Sr)2(Al,Fe)3(SiO4)(Si2O7)O(OH) P 2₁/m 2/m

58.02.01a.04 Mukhinite Ca2Al2V(SiO4)3(OH) P 2₁/m 2/m

58.02.01a.05 Piemontite Ca2(Al,Mn,Fe)3(SiO4)3(OH)=Ca2(Mn,Fe)Al2(SiO4)(Si2O7)O(OH) P 2₁/m 2/m

58.02.01a.06 Piemontite-(Sr)! (Ca,Mn)(Sr,Ca)Mn(Al,Mn,Fe)2(SiO4)(Si2O7)O(OH) P 2₁/m 2/m

58.02.01a.07 Manganipiemontite-(Sr)! CaSr(Mn,Fe)2Al[Si3O12](OH) P 2₁/m 2/m

58.02.01a.08 Gatelite-(Ce)! (Ca,Ce,La,Nd)4(Al,Mg,Fe)4[Si2O7][SiO4]3(O,F,OH)3 P 2₁/a 2/m

58.02.01a.09 Clinozoisite-(Sr)! CaSrAl3(Si2O7)(SiO4)O(OH) P 2₁/m 2/m

58.02.01a.10 Uedaite-(Ce)! MnCeAl2Fe(Si2O7)(SiO4)O(OH) P 2₁/m 2/m

58.02.01a.11 Epidote-(Sr)! CaSrAl2Fe(Si2O7)(SiO4)O(OH) P 2₁/m 2/m

Strunz Class:

09.BG.05a 09 - SILICATES (Germanates)

09.B - Sorosilicates

09.BG -Sorosilicates with mixed SiO4 and Si2O7 groups;

09.BG.05a Clinozoisite Ca2Al3(SiO4)3(OH)=Ca2AlAl2(SiO4)(Si2O7)O(OH) P 2₁/m 2/m

09.BG.05a Epidote Ca2(Fe,Al)3(SiO4)3(OH)=Ca2(Fe,Al)Al2(SiO4)(Si2O7)O(OH) P 2₁/m 2/m

09.BG.05a Epidote-(Pb) (Ca,Pb,Sr)2(Al,Fe)3(SiO4)(Si2O7)O(OH) P 2₁/m 2/m

09.BG.05a Mukhinite Ca2Al2V(SiO4)3(OH) P 2₁/m 2/m

09.BG.05a Piemontite Ca2(Al,Mn,Fe)3(SiO4)3(OH)=Ca2(Mn,Fe)Al2(SiO4)(Si2O7)O(OH) P 2₁/m 2/m

09.BG.05a Piemontite-(Sr)! (Ca,Mn)(Sr,Ca)Mn(Al,Mn,Fe)2(SiO4)(Si2O7)O(OH) P 2₁/m 2/m

09.BG.05a Manganipiemontite-(Sr)! CaSr(Mn,Fe)2Al[Si3O12](OH) P 2₁/m 2/m

09.BG.05a Clinozoisite-(Sr)! CaSrAl3(Si2O7)(SiO4)O(OH) P 2₁/m 2/m

09.BG.05a Epidote-(Sr)! CaSrAl2Fe(Si2O7)(SiO4)O(OH) P 2₁/m 2/m

Other Epidote-(Sr) Information

See Also:

Links to other databases for Epidote-(Sr) :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Epidote-(Sr)

CaSrAl2Fe+++(Si2O7)(SiO4)O(OH)
Dana No: 58.02.01a.11 Strunz No: 09.BG.05a
Locality:

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