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Uedaite-(Ce) Mineral Data

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General Uedaite-(Ce) Information

Help on Chemical Formula: Chemical Formula: Mn++CeAl2Fe++(Si2O7)(SiO4)O(OH)
Help on Composition: Composition: Molecular Weight = 584.87 gm
   Calcium         1.78 %  Ca    2.49 % CaO
   Lanthanum       2.61 %  La    3.06 % La2O3
   Cerium          9.34 %  Ce   10.94 % Ce2O3
   Praeseodymium   1.69 %  Pr    1.97 % Pr2O3
   Samarium        1.29 %  Sm    1.49 % Sm2O3
   Gadolinium      0.54 %  Gd    0.62 % Gd2O3
   Yttrium         0.61 %  Y     0.77 % Y2O3
   Thorium         0.40 %  Th    0.45 % ThO2
   Magnesium       0.04 %  Mg    0.07 % MgO
   Manganese       4.79 %  Mn    6.19 % MnO
   Aluminum        8.72 %  Al   16.47 % Al2O3
   Iron           12.80 %  Fe   16.46 % FeO
   Silicon        14.41 %  Si   30.82 % SiO2
   Hydrogen        0.17 %  H     1.54 % H2O
   Neodymium       5.67 %  Nd    6.62 % Nd2O3
   Oxygen         35.15 %  O
                 ______        ______ 
                 100.00 %       99.97 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mn2+0.51Ca0.26Ce0.39Nd0.23La0.11Pr0.07Sm0.05Y0.04Gd0.02Th0.01Al1.89Fe2+1.34Mg0.01 (Si2O7)(SiO4)O0.85(OH)
Help on Environment: Environment: Found in a granite at a quarry. Epidote group
Help on IMA Status: IMA Status: Approved IMA 2006 (Dana # Added)
Help on Locality: Locality: Marutoku quarry, Shodoshima Island in Seto Inland Sea, Kagawa Prefecture, Japan Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Tateo Ueda (1912-2000), who was the first to solve the crystal structure of allanite.
Help on Synonym: Synonym: IMA2006-022
 

Uedaite-(Ce) Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =1.5567:1:1.7741
Help on Cell Dimensions: Cell Dimensions: a = 8.939, b = 5.742, c = 10.187, Z = 2; beta = 115.1° V = 473.50 Den(Calc)= 4.10
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.92(1), 3.53(0.54), 2.71(0.43),2.62(0.39), 8.03(0.26), 9.23(0.24), 2.87(0.23), 2.14(0.19),
 

Physical Properties of Uedaite-(Ce)

Help on Cleavage: Cleavage: {001} Poor
Help on Color: Color: Black, Dark brown.
Help on Diaphaneity: Diaphaneity: Translucent to Opaque
Help on Fracture: Fracture: Brittle - Uneven - Very brittle fracture producing uneven fragments.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Hardness: Hardness: 5-6 - Between Apatite and Orthoclase
Help on Luster: Luster: Vitreous - Greasy
Help on Streak: Streak: gray
 

Optical Properties of Uedaite-(Ce)

Help on Gladstone-Dale: Gladstone-Dale: CI calc= 0.006 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1878,KC= 0.1889
Ncalc = 1.77
Help on Optical Data: Optical Data: Biaxial (-), b=1.77
 

Calculated Properties of Uedaite-(Ce)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.88 gm/cc
note: Specific Gravity of Uedaite-(Ce) =4.10 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PEUedaite-(Ce) = 125.07 barns/electron
U=PEUedaite-(Ce) x relectron= 485.62 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 8,088.79 (Gamma Ray American Petroleum Institute Units)
Concentration of Uedaite-(Ce) per GRapi unit = 123.63 (PPM)

Uedaite-(Ce) is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram.

Estimated Radioactivity from Uedaite-(Ce) - 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 / 7.75 cm 179,369 4.85E-06 8,088.79 2.66
100 gm / 3.60 cm 17,937 4.85E-07 808.88 0.27
10 gm / 1.67 cm 1,794 4.85E-08 80.89 0.03
1 gm / 7.75 mm 179 4.85E-09 8.09 0.00
0.1 gm / 3.60 mm 18 4.85E-10 0.81 0.00
0.01 gm / 1.67 mm 2 4.85E-11 0.08 0.00
0.001 gm / 0.78 mm 0 4.85E-12 0.01 0.00

Weight of pure Uedaite-(Ce) in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.10 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
 

Uedaite-(Ce) Classification
Help on Dana Class: Dana Class: 58.02.01a.10 (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)
  (58.02.01a)Epidote group (Clinozoisite subgroup)
 
58.02.01a.01 Clinozoisite! Ca2Al3(SiO4)3(OH)=Ca2AlAl2(SiO4)(Si2O7)O(OH) P 21/m 2/m
 
58.02.01a.02 Epidote! Ca2(Fe,Al)3(SiO4)3(OH)=Ca2(Fe,Al)Al2(SiO4)(Si2O7)O(OH) P 21/m 2/m
 
58.02.01a.03 Epidote-(Pb)! (Ca,Pb,Sr)2(Al,Fe)3(SiO4)(Si2O7)O(OH) P 21/m 2/m
 
58.02.01a.04 Mukhinite Ca2Al2V(SiO4)3(OH) P 21/m 2/m
 
58.02.01a.05 Piemontite Ca2(Al,Mn,Fe)3(SiO4)3(OH)=Ca2(Mn,Fe)Al2(SiO4)(Si2O7)O(OH) P 21/m 2/m
 
58.02.01a.06 Piemontite-(Sr)! (Ca,Mn)(Sr,Ca)Mn(Al,Mn,Fe)2(SiO4)(Si2O7)O(OH) P 21/m 2/m
 
58.02.01a.07 Manganipiemontite-(Sr)! CaSr(Mn,Fe)2Al[Si3O12](OH) P 21/m 2/m
 
58.02.01a.08 Gatelite-(Ce)! (Ca,Ce,La,Nd)4(Al,Mg,Fe)4[Si2O7][SiO4]3(O,F,OH)3 P 21/a 2/m
 
58.02.01a.09 Clinozoisite-(Sr)! CaSrAl3(Si2O7)(SiO4)O(OH) P 21/m 2/m
 
58.02.01a.10 Uedaite-(Ce)! MnCeAl2Fe(Si2O7)(SiO4)O(OH) P 21/m 2/m
 
58.02.01a.11 Epidote-(Sr)! CaSrAl2Fe(Si2O7)(SiO4)O(OH) P 21/m 2/m
Help on Strunz Class: Strunz Class: 09.BG.05b 09 - SILICATES (Germanates)
  09.B - Sorosilicates
  09.BG -Sorosilicates with mixed SiO4 and Si2O7 groups;
 
09.BG.05b Allanite-(La)! Ca(REE,Ca)Al2(Fe,Fe)(SiO4)(Si2O7)O(OH) P 21/m 2/m
 
09.BG.05b Allanite-(Y) (Y,Ce,Ca)2(Al,Fe)3(SiO4)3(OH) P 21/m 2/m
 
09.BG.05b Allanite-(Ce) (Ce,Ca,Y)2(Al,Fe)3(SiO4)3(OH) P 21/m 2/m
 
09.BG.05b Manganiandrosite-(La)! (Mn,Ca)(La,Ce,Ca,Nd)AlMnMn(SiO4)(Si2O7)O(OH) P 21/m 2/m
 
09.BG.05b Dissakisite-(Ce) Ca(Ce,REE)(Mg,Fe)(Al,Fe)2Si3O12(OH) P 21/m 2/m
 
09.BG.05b Manganiandrosite-(Ce)! (Mn,Ca)(Ce,REE)AlMnMn(Si2O7)(SiO4)O(OH) P 21/m 2/m
 
09.BG.05b Vanadoandrosite-(Ce)! (Mn,Ca)(REE)VAlMn(Si2O7)(SiO4)O(OH) P 21/m 2/m
 
09.BG.05b Dissakisite-(La)! (Ca,Fe,Th,La)(La,REE,Ca)(Al,Cr,Ti)2(Mg,Fe,Al)Si3O12(OH,F)withLa>Ce P 21/m 2/m
 
09.BG.05b Ferriallanite-(Ce)! CaCe(Fe,Fe,Al)3[SiO4][Si2O7]O(OH) P 21/m 2/m
 
09.BG.05b Uedaite-(Ce)! MnCeAl2Fe(Si2O7)(SiO4)O(OH) P 21/m 2/m
 

Other Uedaite-(Ce) Information
Help on References: References: NAME( AmMin, v93:1944) PHYS. PROP.(AmMin, v93:1944) OPTIC PROP.(AmMin, v93:1944)
Help on See Also: See Also: Links to other databases for Uedaite-(Ce) :
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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Uedaite-(Ce)

Mn++CeAl2Fe++(Si2O7)(SiO4)O(OH)
Dana No: 58.02.01a.10 Strunz No: 09.BG.05b
Locality:

 

Notes:

 
 
   
 

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