Mineralogy Database

Muirite Mineral Data

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General Muirite Information

Help on Chemical  Formula: Chemical Formula: Ba10Ca2Mn++TiSi10O30(OH,Cl,F)10
Help on Composition: Composition: Molecular Weight = 2,526.04 gm
   Barium     54.36 %  Ba   60.70 % BaO
   Calcium     3.17 %  Ca    4.44 % CaO
   Titanium    1.90 %  Ti    3.16 % TiO2
   Manganese   2.17 %  Mn    2.81 % MnO
   Silicon    11.12 %  Si   23.79 % SiO2
   Hydrogen    0.28 %  H     2.50 % H2O
   Chlorine    2.81 %  Cl    2.81 % Cl
                -   %   Cl   -0.63 % -O=Cl2   
   Oxygen     23.44 %  O
   Fluorine    0.75 %  F     0.75 % F
                -   %   F    -0.32 % -O=F2    
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ba10Ca2Mn2+TiSi10O30(OH)7Cl2F
Help on IMA Status: IMA Status: Approved IMA 1965
Help on Locality: Locality: Big Creek - Rush Creek sanbornite deposit, 5 miles NE of Trimmer, Fresno Co., California. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for John Muir (1838-1914), American geologist and explorer who made early observations in geology in the Sierra Nevada Mountains, California, USA.
Help on Name Pronunciation: Name Pronunciation: Muirite Say MUIRITE
Help on Synonym: Synonym: ICSD 23533
  PDF 18-161

Muirite Image

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  Muirite   Sanbornite

Comments: Translucent orange crystalline muirite in sanbornite.
Location: Big Creek, Fresno County, California, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Muirite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:0.40178
Help on Cell Dimensions: Cell Dimensions: a = 14, c = 5.625, Z = 1; V = 1,102.50 Den(Calc)= 3.80
Help on Crystal System: Crystal System: Tetragonal - Ditetragonal Dipyramidal H-M Symbol (4/m 2/m 2/m) Space Group: P 4/mmm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.91(1), 4.42(0.75), 3.73(0.6),

Physical Properties of Muirite

Help on Cleavage: Cleavage: {001} Indistinct, {100} Indistinct
Help on Color: Color: Orange, Brown.
Help on Density: Density: 3.86
Help on Habit: Habit: Anhedral Grains - Granular minerals without the expression of crystal shapes
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: light orange

Optical Properties of Muirite

Help on Dichroism (e): Dichroism (e): orange.
Help on Dichroism (w): Dichroism (w): colorless.
Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.054 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.071 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1843,KPDmeas= 0.1815,KC= 0.1722
Ncalc = 1.65 - 1.66
Help on Optical Data: Optical Data: Uniaxial (+), w=1.697, e=1.704, bire=0.0070.

Calculated Properties of Muirite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.46 gm/cc
note: Specific Gravity of Muirite =3.86 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.1
Boson Index = 0.9
Help on Photoelectric: Photoelectric: PEMuirite = 244.96 barns/electron
U=PEMuirite x rElectron Density= 848.20 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Muirite is Not Radioactive

Muirite Classification

Help on  Dana Class: Dana Class: (62)Cyclosilicate Eight-Membered Rings
  (62.01)with 8-memebered and larger rings
  (62.01.01)Muirite Group Muirite Ba10Ca2MnTiSi10O30(OH,Cl,F)10 P 4/mmm 4/m 2/m 2/m Cerchiaraite! Ba4(Mn,Fe,Al)4Si6(O,OH,Cl)26 I 4/mmm 4/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 09.CN.05 09 - SILICATES (Germanates)
  09.C - Cyclosilicates
  09.CN -[Si8O24]16- 8-membered rings
09.CN.05 Muirite Ba10Ca2MnTiSi10O30(OH,Cl,F)10 P 4/mmm 4/m 2/m 2/m

Other Muirite Information

Help on References: References: NAME( MinRec) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Muirite :
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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Dana No: Strunz No: 09.CN.05





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