Mineralogy Database

Matsubaraite Mineral Data

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General Matsubaraite Information

Help on Chemical  Formula: Chemical Formula: Sr4TiTi4Si4O22
Help on Composition: Composition: Molecular Weight = 1,054.21 gm
   Strontium  33.25 %  Sr   39.32 % SrO
   Titanium   22.71 %  Ti   37.89 % TiO2
   Silicon    10.66 %  Si   22.80 % SiO2
   Oxygen     33.39 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Sr4Ti5Si4O22
Help on Environment: Environment: Jadeitite boulder found in a river. Perrierite group; structure
Help on IMA Status: IMA Status: Approved IMA 2002 (Dana # Added)
Help on Locality: Locality: Itoigawa-Ohmi, Niigata Prefecture, Japan Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after Satoshi Matsubara, specialist for strontium minerals in the National Science Museum, Tokyo, Japan.
Help on Synonym: Synonym: IMA2000-027

Matsubaraite Image

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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

Matsubaraite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =2.4614:1:2.1112
Help on Cell Dimensions: Cell Dimensions: a = 13.848, b = 5.626, c = 11.878, Z = 2; beta = 114.19° V = 844.14 Den(Calc)= 4.15
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/a
Help on X Ray Diffraction: 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)(

Physical Properties of Matsubaraite

Help on Cleavage: Cleavage: None
Help on Color: Color: Blue tinted gray.
Help on Diaphaneity: Diaphaneity: Transparent
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Fan Shaped - Occurs as radiating crystals shaped like a fan.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Hardness: Hardness: 5.5 - Knife Blade
Help on Luster: Luster: Adamantine
Help on Streak: Streak: white

Optical Properties of Matsubaraite

Help on Optical Data: Optical Data: Biaxial (+)
  NCalc= 2.05 - from Gladstone-Dale relationship (KC = 0.2533) where Ncalc=Dcalc*KC+1

Calculated Properties of Matsubaraite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.89 gm/cc
note: Specific Gravity of Matsubaraite =4.15 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.05
Boson Index = 0.95
Help on Photoelectric: Photoelectric: PEMatsubaraite = 41.76 barns/electron
U=PEMatsubaraite x rElectron Density= 162.42 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Matsubaraite is Not Radioactive

Matsubaraite Classification

Help on  Dana Class: Dana Class: (56)Sorosilicate Si2O7 Groups and O, OH, F. and H2O
  (56.02)with cations in [4] and/or >[4] coordination
  (56.02.08)Perierite - Chevkinite group Chevkinite-(Ce) (Ce,La,Ca,Th)4(Fe,Mg)2(Ti,Fe)3Si4O22 C 2/m 2/m Strontiochevkinite (Sr,REE)4Fe(Ti,Zr)2Ti2Si4O22 C 2/a 2/m Perrierite-(Ce) (Ce,La,Ca)4(Fe,Mg)2(Ti,Fe)3Si4O22 C 21/a 2/m Orthochevkinite* (Ce,La,Ca,Na,Th)4(Fe,Mg)2(Ti,Fe)3Si4O22 Unk Ortho Rengeite! Sr4ZrTi4Si4O22 P 21/a 2/m Matsubaraite! Sr4TiTi4Si4O22 P 21/a 2/m Polyakovite-(Ce)! (Ce,La,Nd,Pr,Ca)4(Mg,Fe)(Cr,Fe)2(Ti,Nb)2Si4O22 C 2/m 2/m Maoniupingite-(Ce)! (REE,Ca)4(Fe,Ti,Fe,[])(Ti,Fe,Fe,Nb)4Si4O22 C 2/m 2/m Dingdaohengite-(Ce)! (Ce,La)4Fe(Ti,Fe,Mg,Fe)2Ti2Si4O22 P 21/a (pseudo-C 2/m) 2/m
Help on  Strunz Class: Strunz Class: 09.BE.70 09 - SILICATES (Germanates)
  09.B - Sorosilicates
  09.BE -Si2O7 groups with additional anions;
09.BE.70 Chevkinite-(Ce) (Ce,La,Ca,Th)4(Fe,Mg)2(Ti,Fe)3Si4O22 C 2/m 2/m
09.BE.70 Karnasurtite-(Ce) (Ce,La,Th)(Ti,Nb)(Al,Fe)(Si,P)2O7(OH)4•3(H2O)(?) Unk. Hex
09.BE.70 Perrierite-(Ce) (Ce,La,Ca)4(Fe,Mg)2(Ti,Fe)3Si4O22 C 21/a 2/m
09.BE.70 Strontiochevkinite (Sr,REE)4Fe(Ti,Zr)2Ti2Si4O22 C 2/a 2/m
09.BE.70 Rengeite! Sr4ZrTi4Si4O22 P 21/a 2/m
09.BE.70 Maoniupingite-(Ce)! (REE,Ca)4(Fe,Ti,Fe,[])(Ti,Fe,Fe,Nb)4Si4O22 C 2/m 2/m
09.BE.70 Matsubaraite! Sr4TiTi4Si4O22 P 21/a 2/m
09.BE.70 Polyakovite-(Ce)! (Ce,La,Nd,Pr,Ca)4(Mg,Fe)(Cr,Fe)2(Ti,Nb)2Si4O22 C 2/m 2/m
09.BE.70 Dingdaohengite-(Ce)! (Ce,La)4Fe(Ti,Fe,Mg,Fe)2Ti2Si4O22 P 21/a (pseudo-C 2/m) 2/m

Other Matsubaraite Information

Help on References: References: NAME( AmMin v 88, p 1837) PHYS. PROP.(AmMin v 88, p 1837) OPTIC PROP.(AmMin v 88, p 1837)
Help on See Also: 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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Dana No: Strunz No: 09.BE.70





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