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Matsubaraite Mineral Data
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General Matsubaraite Information
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 Chemical Formula: |
Sr4TiTi4Si4O22 |
| Composition: |
Molecular Weight = 1,054.21 gm |
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Strontium 33.25 % Sr 39.32 % SrO |
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Titanium 22.71 % Ti 37.89 % TiO2 |
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Silicon 10.66 % Si 22.80 % SiO2 |
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Oxygen 33.39 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
Sr4Ti5Si4O22 |
| Environment: |
Jadeitite boulder found in a river. Perrierite group; structure |
| IMA Status: |
Approved IMA 2002 (Dana # Added) |
| Locality: |
Itoigawa-Ohmi, Niigata Prefecture, Japan Link to MinDat.org Location Data. |
| Name Origin: |
Named after Satoshi Matsubara, specialist for strontium minerals in the National Science Museum, Tokyo, Japan. |
| Synonym: |
IMA2000-027 |
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Matsubaraite Image |
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Images:
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Matsubaraite
Comments: Minute, dark grains of matsubaraite in a very pale green jadeite matrix.
Location: Itoigawa-Ohmi, Niigata Prefecture, Japan.
Scale: Picture size 1 cm.
© American Mineralogist |
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Matsubaraite Crystallography
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| Axial Ratios: |
a:b:c =2.4614:1:2.1112 |
| Cell Dimensions: |
a = 13.848, b = 5.626, c = 11.878, Z = 2; beta = 114.19° V = 844.14 Den(Calc)= 4.15 |
| Crystal System: |
Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/a |
| X Ray Diffraction: |
By Intensity(I/Io): 2.71(1)(021,004,203), 1.95(0.95)(024,406,223), 2.96(0.95)(204,311),
3.09(0.95)(403), 2.17(0.9)(315,421,422)3.01(0.9)(
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Physical Properties of Matsubaraite
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| Cleavage: |
None |
| Color: |
Blue tinted gray. |
| Diaphaneity: |
Transparent |
| Habit: |
Aggregates - Made of numerous individual crystals or clusters. |
| Habit: |
Fan Shaped - Occurs as radiating crystals shaped like a fan. |
| Habit: |
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline). |
| Hardness: |
5.5 - Knife Blade |
| Luster: |
Adamantine |
| Streak: |
white |
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Optical Properties of Matsubaraite
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| Optical Data: |
Biaxial (+) |
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NCalc= 2.05 - from Gladstone-Dale relationship (KC = 0.2533) where Ncalc=Dcalc*KC+1
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Calculated Properties of Matsubaraite
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| Electron Density: |
Bulk Density (Electron Density)=3.89 gm/cc
note: Specific Gravity of Matsubaraite =4.15 gm/cc.
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| Fermion Index: |
Fermion Index = 0.05
Boson Index = 0.95 |
| Photoelectric: |
PEMatsubaraite = 41.76 barns/electron
U=PEMatsubaraite x rElectron Density= 162.42 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Matsubaraite is Not Radioactive |
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Matsubaraite Classification
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| Dana Class: |
56.02.08.06 (56)Sorosilicate Si2O7 Groups and O, OH, F. and H2O |
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(56.02)with cations in [4] and/or >[4] coordination |
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(56.02.08)Perierite - Chevkinite group |
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56.02.08.01 Chevkinite-(Ce) (Ce,La,Ca,Th)4(Fe,Mg)2(Ti,Fe)3Si4O22 C 2/m 2/m |
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56.02.08.02 Strontiochevkinite (Sr,REE)4Fe(Ti,Zr)2Ti2Si4O22 C 2/a 2/m |
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56.02.08.03 Perrierite-(Ce) (Ce,La,Ca)4(Fe,Mg)2(Ti,Fe)3Si4O22 C 21/a 2/m |
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56.02.08.04 Orthochevkinite* (Ce,La,Ca,Na,Th)4(Fe,Mg)2(Ti,Fe)3Si4O22 Unk Ortho |
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56.02.08.05 Rengeite! Sr4ZrTi4Si4O22 P 21/a 2/m |
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56.02.08.06 Matsubaraite! Sr4TiTi4Si4O22 P 21/a 2/m |
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56.02.08.07 Polyakovite-(Ce)! (Ce,La,Nd,Pr,Ca)4(Mg,Fe)(Cr,Fe)2(Ti,Nb)2Si4O22 C 2/m 2/m |
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56.02.08.08 Maoniupingite-(Ce)! (REE,Ca)4(Fe,Ti,Fe,[])(Ti,Fe,Fe,Nb)4Si4O22 C 2/m 2/m |
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56.02.08.09 Dingdaohengite-(Ce)! (Ce,La)4Fe(Ti,Fe,Mg,Fe)2Ti2Si4O22 P 21/a (pseudo-C 2/m) 2/m |
| Strunz Class: |
09.BE.70 09 - SILICATES (Germanates) |
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09.B - Sorosilicates |
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09.BE -Si2O7 groups with additional anions; |
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09.BE.70 Chevkinite-(Ce) (Ce,La,Ca,Th)4(Fe,Mg)2(Ti,Fe)3Si4O22 C 2/m 2/m |
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09.BE.70 Karnasurtite-(Ce) (Ce,La,Th)(Ti,Nb)(Al,Fe)(Si,P)2O7(OH)4•3(H2O)(?) Unk. Hex |
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09.BE.70 Perrierite-(Ce) (Ce,La,Ca)4(Fe,Mg)2(Ti,Fe)3Si4O22 C 21/a 2/m |
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09.BE.70 Strontiochevkinite (Sr,REE)4Fe(Ti,Zr)2Ti2Si4O22 C 2/a 2/m |
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09.BE.70 Rengeite! Sr4ZrTi4Si4O22 P 21/a 2/m |
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09.BE.70 Maoniupingite-(Ce)! (REE,Ca)4(Fe,Ti,Fe,[])(Ti,Fe,Fe,Nb)4Si4O22 C 2/m 2/m |
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09.BE.70 Matsubaraite! Sr4TiTi4Si4O22 P 21/a 2/m |
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09.BE.70 Polyakovite-(Ce)! (Ce,La,Nd,Pr,Ca)4(Mg,Fe)(Cr,Fe)2(Ti,Nb)2Si4O22 C 2/m 2/m |
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09.BE.70 Dingdaohengite-(Ce)! (Ce,La)4Fe(Ti,Fe,Mg,Fe)2Ti2Si4O22 P 21/a (pseudo-C 2/m) 2/m |
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Other Matsubaraite Information
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| References: |
NAME( AmMin v 88, p 1837) PHYS. PROP.(AmMin v 88, p 1837) OPTIC PROP.(AmMin v 88, p 1837) |
| See Also: |
Links to other databases for Matsubaraite :
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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Matsubaraite
Sr4TiTi4Si4O22
Dana No: 56.02.08.06 Strunz No: 09.BE.70
Locality:
Notes:
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