Yoshimuraite Mineral Data

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General Yoshimuraite Information

Chemical Formula:

(Ba,Sr)2(Mn,Fe)2(Ti,Fe)(Si2O7)2(PO4,SO4)(OH)

Composition:

Molecular Weight = 705.01 gm

Barium 35.06 % Ba 39.15 % BaO

Strontium 2.49 % Sr 2.94 % SrO

Titanium 5.43 % Ti 9.06 % TiO₂

Manganese 12.47 % Mn 16.10 % MnO

Iron 4.75 % Fe 4.08 % FeO / 2.27 % Fe₂O₃

Silicon 7.97 % Si 17.04 % SiO₂

Phosphorus 2.64 % P 6.04 % P₂O₅

Hydrogen 0.14 % H 1.28 % H₂O

Sulfur 1.82 % S 4.54 % SO₃

Oxygen 27.23 % O

______ ______

100.00 % 102.50 % = TOTAL OXIDE

Empirical Formula:

Ba_1.8Sr_0.2Mn²⁺_1.6Fe²⁺_0.4Ti_0.8Fe³⁺_0.2(Si₂O₇)(PO₄)_0.6(SO₄)_0.4(OH)

Environment:

In the border facies of an alkalic pegmatite cutting a stratiform manganese deposit

IMA Status:

Approved IMA 1961

Locality:

In the Noda-Tamagawa mine, Iwate Prefecture, Japan. Link to MinDat.org Location Data.

Name Origin:

Named for Toyofumi Yoshimura, Kyushu University, Hakozaki, Japan.

Name Pronunciation:

Yoshimuraite + Pronunciation

Synonym:

ICSD 89862

PDF 36-411

Yoshimuraite Image

Images:

Yoshimuraite

Comments: Translucent, brown yoshimuraite microcrystal.
Location: Toguchi Mine, Shidara, Kitashidara-Gun, Aichi, Japan. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Images:

Yoshimuraite Katophorite

Comments: Dark green katophorite associated with yoshimuraite. Inset fragment shows the transparency of the katophorite.
Location: Toguchi mine, Shidara, Kitashidara-Gun, Aichi, Japan. Scale: See Image.
© Rruff Database

Yoshimuraite Crystallography

Axial Ratios:

a:b:c =0.7695:1:2.1071

Cell Dimensions:

a = 5.386, b = 6.999, c = 14.748, Z = 2; alpha = 89.98°, beta = 93.62°, gamma = 95.5° V = 552.29 Den(Calc)= 4.24

Crystal System:

Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1

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

By Intensity(I/I_o): 2.91(1), 3.21(0.5), 4.85(0.5),

Crystal Structure:

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drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
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McDonald A M , Grice J D , Chao G Y , The Canadian Mineralogist , 38 (2000) p.649-656, The crystal structure of yoshimuraite, a layered Ba-Mn-Ti silicophosphate,, with comments on five-coordinated Ti

Physical Properties of Yoshimuraite

Cleavage:

{010} Perfect, {101} Distinct, {101} Distinct

Color:

Orange brown.

Density:

4.13

Fracture:

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

Hardness:

4.5 - Between Fluorite and Apatite

Optical Properties of Yoshimuraite

Gladstone-Dale:

CI meas= 0.04 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.065 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1828,KPDmeas= 0.1877,KC= 0.1954
Ncalc = 1.81 - 1.83

Optical Data:

Biaxial (+), a=1.763, b=1.777, g=1.785, bire=0.0220, 2V(Calc)=72, 2V(Meas)=85-90.

Calculated Properties of Yoshimuraite

Electron Density:

Bulk Density (Electron Density)=3.77 gm/cc
note: Specific Gravity of Yoshimuraite =4.13 gm/cc.

Fermion Index:

Fermion Index = 0.07
Boson Index = 0.93

Photoelectric:

PE_Yoshimuraite= 163.13 barns/electron
U=PE_Yoshimuraite x rElectron Density= 615.41 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Yoshimuraite is Not Radioactive

Yoshimuraite Classification

Dana Class:

58.02.06.01 (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)

(58.02.06)Yoshimuraite and related species

58.02.06.01 Yoshimuraite (Ba,Sr)2(Mn,Fe)2(Ti,Fe)(Si2O7)2(PO4,SO4)(OH) P1 1

58.02.06.02 Innelite (Na,Mg,Ca)2(Ba,K)4Ti3(Si2O7)2(SO4)2(OH,F) P1 1

58.02.06.03 Phosphoinnelite! Ba4Na3Ti3Si4O14(PO4,SO4)2(O,F)3 P1 or P1 Tri

Strunz Class:

09.BE.42 09 - SILICATES (Germanates)

09.B - Sorosilicates

09.BE -Si2O7 groups with additional anions;

09.BE.42 Yoshimuraite (Ba,Sr)2(Mn,Fe)2(Ti,Fe)(Si2O7)2(PO4,SO4)(OH) P1 1

Other Yoshimuraite Information

References:

NAME( AntBidBlaNic2) PHYS. PROP.(AmMin, Vol 86) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Yoshimuraite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Print or Cut-and-Paste your Yoshimuraite Specimen Label here :

Yoshimuraite

(Ba,Sr)2(Mn,Fe)2(Ti,Fe)(Si2O7)2(PO4,SO4)(OH)
Dana No: 58.02.06.01 Strunz No: 09.BE.42
Locality:

Notes: