Murataite Mineral Data + Say MURATAITE


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General Murataite Information
Help on Chemical Formula: Chemical Formula: (Y,Na)6(Zn,Fe+++)5(Ti,Nb)12O29(O,F)14
Help on Composition: Composition: Molecular Weight = 2,000.60 gm
   Sodium            4.60 %  Na    6.20 % Na2O
   Calcium           0.60 %  Ca    0.84 % CaO
   La,Ce,Pr,Nd,Sm,   8.64 %  RE   10.08 % REE2O3
   Yttrium           9.78 %  Y    12.42 % Y2O3
   Titanium         22.98 %  Ti   38.33 % TiO2
   Manganese         0.55 %  Mn    0.71 % MnO
   Niobium           6.97 %  Nb    9.96 % Nb2O5
   Zinc              9.15 %  Zn   11.39 % ZnO
   Iron              2.79 %  Fe    3.99 % Fe2O3
   Silicon           0.14 %  Si    0.30 % SiO2
   Hydrogen          0.06 %  H     0.54 % H2O
   Oxygen           26.63 %  O
   Fluorine          7.12 %  F     7.12 % F
                      -   %   F    -3.00 % -O=F2
                   ______        ______ 
                   100.00 %       98.88 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na4Y2.2REE1.2Zn2.8Fe3+Ca0.3Mn2+0.2Ti9.6Nb1.5Si0.1O32.1F7.5(OH)1.2
Help on Environment: Environment: From a prospect dump in a pegmatite subjected to alkali metasomatism.
Help on IMA Status: IMA Status: Approved IMA 1974
Help on Locality: Locality: St. Peters Dome area, near Pikes Peak, El Paso County, Colorado, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Kiguma Jack Murata (1909-) Geochemist, U.S. Geological Survey, Menlo Park, California, USA.
Help on Synonym: Synonym: ICSD 81595
  PDF 26-1383
 

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Murataite Crystallography
Help on Cell Dimensions: Cell Dimensions: a = 14.886, Z = 4; V = 3,298.63 Den(Calc)= 4.03
Help on Crystal System: Crystal System: Isometric - HextetrahedralH-M Symbol (4 3m) Space Group: F43m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.858(1), 1.489(0.8), 1.746(0.8),
Click Here for Large Murataite Structure Window Crystal Structure:

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Ercit T S , Hawthorne F C , The Canadian Mineralogist , 33 (1995) p.1223-1229, Murataite, a UB12 derivative structure with condensed Keggin molecules

 

Physical Properties of Murataite

Help on Color: Color: Black.
Help on Density: Density: 4.69
Help on Diaphaniety: Diaphaniety: Translucent to Opaque
Help on Fracture: Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Help on Habit: Habit: Granular - Generally occurs as anhedral to subhedral crystals in matrix.
Help on Habit: Habit: Subhedral Crystals - Occurs as crystals which tend to exhibit a recognizable crystal shape.
Help on Hardness: Hardness: 6-6.5 - Orthoclase-Pyrite
Help on Luster: Luster: Sub Metallic
 

Optical Properties of Murataite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.092 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.057 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2779,KPDmeas= 0.2388,KC= 0.2629
Help on Optical Data: Optical Data: Isotropic, n=2.11-2.13.
Help on RL Anisotrophism: RL Anisotrophism: Weak.
Help on RL Bireflectance: RL Bireflectance: Slight.
Help on RL Color: RL Color: Gray with faint orange internal reflections.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Murataite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 546 nm   13.70   13.30 
   
 589 nm   13.10   12.70 
 630 nm   12.70   12.30 
Calculated Relative Intensity Colors of Murataite in Air
Relative
Intensity		    0%   70% 100% 140% 210% 280% 350% 420% 490% 560% 630% 700%
R1                        
R2                        
 

Calculated Properties of Murataite

Help on Electron Density: Electron Density:

relectron=3.76 gm/cc
note: rMurataite =4.03 gm/cc.
Help on Fermion Index Fermion Index Fermion Index = 0.05032
Boson Index = 0.94968
Help on Photoelectric: Photoelectric:

PEMurataite = 85.12 barns/electron
U=PEMurataite x relectron= 320.03 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 8,626.10 (Gamma Ray American Petroleum Institute Units)

Murataite is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram.

Estimated Radioactivity from Murataite - mild
Specimen
Size
Weight/Volume
(Sphere) *		 Calculated
Activity
Bequerols
(Bq)		 Calculated
Activity
Curies (Ci)		 Estimated
Activity
GR(api)		 Estimated
Exposure
(mRem**)/hr
If Held in Hand
For One Hour
1000 gm / 7.80 cm 194,173 5.25E-06 8,626.10 2.84
100 gm / 3.62 cm 19,417 5.25E-07 862.61 0.28
10 gm / 1.68 cm 1,942 5.25E-08 86.26 0.03
1 gm / 7.80 mm 194 5.25E-09 8.63 0.00
0.1 gm / 3.62 mm 19 5.25E-10 0.86 0.00
0.01 gm / 1.68 mm 2 5.25E-11 0.09 0.00
0.001 gm / 0.78 mm 0 5.25E-12 0.01 0.00

Weight of pure Murataite in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.03 gm/cc.*
Goverment Estimate of Average Annual Exposure ( 360 mRem) **
Note: 10 microsieverts/hr = 1 mRem/hr **
Max Permissable Adult Dose 50,000 mRem/yr (hands), 15,000 mRem/yr (eyes)
Lethal Dose LD(50) Exposure 400,000 to 500,000 mRem
Estimated Thorium Activity ( 0.43 % Th) From Sum REE Elements ( 8.64 % REE)
 

Murataite Classification
Help on Dana Class: Dana Class: 8.7.1.1 (8)Multiple Oxides with Nb, Ta, and Ti
  (8.7)Dana Type
  (8.7.1)Dana Group
 
8.7.1.1 Murataite (Y,Na)6(Zn,Fe)5(Ti,Nb)12O29(O,F)14 F43m 4 3m
Help on Strunz Class: Strunz Class: IV/C.14-10 IV - Oxides
  IV/C - Oxides with metal : oxygen = 2:3 (M2O3 and related compounds)
  IV/C.14 - Stibiconite group, Murataite-Y - Scheteligite series
 
IV/C.14-10 Murataite (Y,Na)6(Zn,Fe)5(Ti,Nb)12O29(O,F)14 F43m 4 3m
 
IV/C.14-20 Scheteligite? (Ca,Y,Sb,Mn)2(Ti,Ta,Nb,W)2O6(O,OH) Unk Ortho
 

Other Murataite Information
Help on References: References: NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic3)
Help on See Also: See Also: Links to other databases for Murataite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -Handbook of Mineralogy (UofA) 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas 11 - WWW-MINCRYST

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

Murataite

(Y,Na)6(Zn,Fe+++)5(Ti,Nb)12O29(O,F)14
Dana No: 8.7.1.1 Strunz No: IV/C.14-10
Locality:

 

Notes:

 
 
   
 
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