Mineralogy Database

Manganiandrosite-(Ce) Mineral Data

Search Webmineral :
  

General Manganiandrosite-(Ce) Information

Help on Chemical Formula: Chemical Formula: (Mn++,Ca)(Ce,REE)AlMn+++Mn++(Si2O7)(SiO4)O(OH)
Help on Composition: Composition: Molecular Weight = 599.53 gm
   Strontium   1.02 %  Sr    1.21 % SrO
   Calcium     2.81 %  Ca    3.93 % CaO
   Lanthanum   5.33 %  La    6.25 % La2O3
   Cerium     10.75 %  Ce   12.59 % Ce2O3
   Samarium    0.25 %  Sm    0.29 % Sm2O3
   Magnesium   0.16 %  Mg    0.27 % MgO
   Titanium    0.80 %  Ti    1.33 % TiO2
   Manganese  20.43 %  Mn   18.46 % MnO /  8.82 % Mn2O3
   Aluminum    4.50 %  Al    8.50 % Al2O3
   Iron        2.14 %  Fe    3.06 % Fe2O3
   Silicon    14.05 %  Si   30.07 % SiO2
   Hydrogen    0.17 %  H     1.50 % H2O
   Neodymium   2.89 %  Nd    3.37 % Nd2O3
   Oxygen     34.69 %  O
             ______        ______ 
             100.00 %       99.65 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mn2+0.6Ca0.4Ce0.46La0.23Nd0.12Sm0.01Sr0.07Ca0.02Mn3+0.63Fe3+0.23Ti0.1Mg0.04Al Mn2+0.96Mn3+0.04(Si2O7)(SiO4)(OH)
Help on Environment: Environment: Found in a Mesozoic eclogite-facies ophiolitic unit of the western Alps. Manganiandrosite-(Ce) has dominant Mn+++ in the M1 site. Epidote group; structure determined
Help on IMA Status: IMA Status: Approved IMA 2002 (Dana # Added)
Help on Locality: Locality: Praborna manganese mine, Saint-Marcel, Aosta valley, Italy. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Commission on New Minerals, Nomenclature and Classification (CNMNC)
Help on Synonym: Synonym: IMA2002-049
 

Manganiandrosite-(Ce) Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =1.5512:1:1.7546
Help on Cell Dimensions: Cell Dimensions: a = 8.901, b = 5.738, c = 10.068, Z = 2; beta = 113.425° V = 471.83 Den(Calc)= 4.22
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): 2.896(1), 2.662(0.58), 2.707(0.43),3.51(0.37), 2.713(0.34), 2.591(0.32), 2.185(0.31),
 

Physical Properties of Manganiandrosite-(Ce)

Help on Cleavage: Cleavage: None
Help on Color: Color: Dark brown.
Help on Diaphaneity: Diaphaneity: Transparent
Help on Luster: Luster: Vitreous - Adamantine
Help on Streak: Streak: reddish brown
 

Optical Properties of Manganiandrosite-(Ce)

Help on Gladstone-Dale: Gladstone-Dale: CI calc= 0.149 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1754,KC= 0.206
Ncalc = 1.87
Help on Optical Data: Optical Data: Biaxial (+), a=1.74, 2V(Meas)=80.6. Dispersion RI > 1.74.
 

Calculated Properties of Manganiandrosite-(Ce)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.99 gm/cc
note: Specific Gravity of Manganiandrosite-(Ce) =4.22 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEManganiandrosite-(Ce) = 102.75 barns/electron
U=PEManganiandrosite-(Ce) x relectron= 409.48 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 19,371.54 (Gamma Ray American Petroleum Institute Units)
Concentration of Manganiandrosite-(Ce) per GRapi unit = 51.62 (PPM)

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

Estimated Radioactivity from Manganiandrosite-(Ce) - weak
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 / 7.68 cm 430,783 1.16E-05 19,371.54 6.37
100 gm / 3.56 cm 43,078 1.16E-06 1,937.15 0.64
10 gm / 1.65 cm 4,308 1.16E-07 193.72 0.06
1 gm / 7.68 mm 431 1.16E-08 19.37 0.01
0.1 gm / 3.56 mm 43 1.16E-09 1.94 0.00
0.01 gm / 1.65 mm 4 1.16E-10 0.19 0.00
0.001 gm / 0.77 mm 0 1.16E-11 0.02 0.00

Weight of pure Manganiandrosite-(Ce) in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.22 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 ( 0.96 % Th) From Sum REE Elements (19.22 % REE)
 

Manganiandrosite-(Ce) Classification
Help on Dana Class: Dana Class: 58.02.01c.09 (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)
  (58.02.01c)Epidote group (Allanite subgroup)
 
58.02.01c.01 Allanite-(Ce) (Ce,Ca,Y)2(Al,Fe)3(SiO4)3(OH) P 21/m 2/m
 
58.02.01c.02 Allanite-(La)! Ca(REE,Ca)Al2(Fe,Fe)(SiO4)(Si2O7)O(OH) P 21/m 2/m
 
58.02.01c.03 Allanite-(Y) (Y,Ce,Ca)2(Al,Fe)3(SiO4)3(OH) P 21/m 2/m
 
58.02.01c.04 Dissakisite-(Ce) Ca(Ce,REE)(Mg,Fe)(Al,Fe)2Si3O12(OH) P 21/m 2/m
 
58.02.01c.05 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
 
58.02.01c.06 Manganiandrosite-(La)! (Mn,Ca)(La,Ce,Ca,Nd)AlMnMn(SiO4)(Si2O7)O(OH) P 21/m 2/m
 
58.02.01c.07 Ferriallanite-(Ce)! CaCe(Fe,Fe,Al)3[SiO4][Si2O7]O(OH) P 21/m 2/m
 
58.02.01c.08 Vastmanlandite-(Ce)! (Ce,La)3CaAl2Mg2[Si2O7][SiO4]3F(OH)2 P 21/m 2/m
 
58.02.01c.09 Manganiandrosite-(Ce)! (Mn,Ca)(Ce,REE)AlMnMn(Si2O7)(SiO4)O(OH) P 21/m 2/m
 
58.02.01c.10 Vanadoandrosite-(Ce)! (Mn,Ca)(REE)VAlMn(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 Manganiandrosite-(Ce) Information
Help on References: References: NAME( AmMin, v92:705) PHYS. PROP.(AmMin, v92:705) OPTIC PROP.(AmMin, v92:705)
Help on See Also: See Also: Links to other databases for Manganiandrosite-(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

Search for Manganiandrosite-(Ce) using:

Google
 
Web webmineral.com
[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Manganiandrosite-(Ce) :

Ask about Manganiandrosite-(Ce) here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Espaņol

Print or Cut-and-Paste your Manganiandrosite-(Ce) Specimen Label here :

Manganiandrosite-(Ce)

(Mn++,Ca)(Ce,REE)AlMn+++Mn++(Si2O7)(SiO4)O(OH)
Dana No: 58.02.01c.09 Strunz No: 09.BG.05b
Locality:

 

Notes:

 
 
   
 

Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.