Clinozoisite-(Sr) Mineral Data

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General Clinozoisite-(Sr) Information

Chemical Formula:

CaSrAl3(Si2O7)(SiO4)O(OH)

Composition:

Molecular Weight = 499.69 gm

Strontium 12.63 % Sr 14.93 % SrO

Calcium 10.27 % Ca 14.36 % CaO

Aluminum 13.39 % Al 25.30 % Al₂O₃

Iron 5.03 % Fe 6.47 % FeO

Silicon 16.86 % Si 36.07 % SiO₂

Hydrogen 0.20 % H 1.80 % H₂O

Oxygen 41.62 % O

______ ______

100.00 % 98.94 % = TOTAL OXIDE

Empirical Formula:

Ca_1.28Sr_0.72Al_2.48Fe²⁺_0.45(Si₂O₇)(SiO₄)O(OH)

Environment:

Occurs interstitally with chlorite and diaspore in a boulder of prehenite. (epidote group; structure)

IMA Status:

Approved IMA 2003 (Dana # Added)

Locality:

Itoigawa-Ohmi district, Niigata Prefecture, central Japan. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Name Pronunciation:

Clinozoisite-(Sr) + Pronunciation

Synonym:

IMA2001-055

Niigataite - Renamed to Clinozoisite-(Sr) - Recommended nomenclature of epidote-group minerals, Eur. J. Mineral. 2006, 18, 551-567.

Clinozoisite-(Sr) Image

Images:

Clinozoisite-(Sr)

Comments: Boulder consisting of prehenite, diaspore, chlorite and niigataite. The pale lavender is prehenite/diaspore and the very pale green is chlorite/niigataite..
Location: Itoigawa, river Kazuo, Niigata prefecture, Japan. Scale: Specimen size 19cm x 16 cm.
© American Mineralogist

Images:

Clinozoisite-(Sr)

Comments: Backscatter electronic image of niigataite (bright) which is partially replacing a chlorite (med gray) grain in a diaspore (dark gray, rod-shaped) and prehenite (light gray) matrix.
Location: Itoigawa, river Kazuo, Niigata prefecture, Japan. Scale: Picture size 5 mm.
© American Mineralogist

Clinozoisite-(Sr) Crystallography

Axial Ratios:

a:b:c =1.5909:1:1.8273

Cell Dimensions:

a = 8.89, b = 5.5878, c = 10.211, Z = 2; beta = 115.12° V = 459.26 Den(Calc)= 3.61

Crystal System:

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

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

By Intensity(I/I_o): 2.9(1)(113), 2.79(0.48)(020,211), 2.7(0.26)(013,300),3.22(0.25)(201), 2.6(0.24)(311), 2.11(0.24)(221,223), 5.05(0.23)(102),

Physical Properties of Clinozoisite-(Sr)

Cleavage:

Perfect

Color:

Pale greenish gray.

Diaphaneity:

Transparent

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Habit:

Subhedral Crystals - Occurs as crystals which tend to exhibit a recognizable crystal shape.

Hardness:

5-5.5 - Apatite-Knife Blade

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Clinozoisite-(Sr)

Gladstone-Dale:

CI calc= 0.022 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1932,KC= 0.1975
Ncalc = 1.71

Optical Data:

Biaxial (?), a=1.67, g=1.725, bire=0.0550

Calculated Properties of Clinozoisite-(Sr)

Electron Density:

Bulk Density (Electron Density)=3.52 gm/cc
note: Specific Gravity of Clinozoisite-(Sr) =3.61 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_{Clinozoisite-(Sr)}= 17.51 barns/electron
U=PE_{Clinozoisite-(Sr)} x rElectron Density= 61.70 barns/cc.

Radioactivity:

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

Clinozoisite-(Sr) Classification

Dana Class:

58.02.01a.09 (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 Clinozoisite-(Sr) Information

References:

NAME( AmMin, v 89, p 469) PHYS. PROP.(AmMin, v 89, p 469) OPTIC PROP.(AmMin, v 89, p 469)

See Also:

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

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Print or Cut-and-Paste your Clinozoisite-(Sr) Specimen Label here :

Clinozoisite-(Sr)

CaSrAl3(Si2O7)(SiO4)O(OH)
Dana No: 58.02.01a.09 Strunz No: 09.BG.05a
Locality:

Notes: