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Manganiandrosite-(La) Mineral Data

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General Manganiandrosite-(La) Information

Help on Chemical Formula: Chemical Formula: (Mn,Ca)(La,Ce,Ca,Nd)AlMn+++Mn++(SiO4)(Si2O7)O(OH)
Help on Composition: Composition: Molecular Weight = 595.24 gm
   Calcium     2.02 %  Ca    2.83 % CaO
   Lanthanum  11.67 %  La   13.68 % La2O3
   Cerium      4.71 %  Ce    5.51 % Ce2O3
   Manganese  25.38 %  Mn   20.86 % MnO / 13.26 % Mn2O3
   Aluminum    4.53 %  Al    8.56 % Al2O3
   Silicon    14.16 %  Si   30.28 % SiO2
   Hydrogen    0.17 %  H     1.51 % H2O
   Neodymium   2.42 %  Nd    2.83 % Nd2O3
   Oxygen     34.94 %  O
             ______        ______ 
             100.00 %       99.33 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mn2+0.75Ca0.3La0.5Ce0.2Nd0.1AlMn3+Mn2+(SiO4)(Si2O7)O(OH)
Help on Environment: Environment: Forms a series with piemontite. Found in a manganese-rich silicate-carbonate rock.
Help on IMA Status: IMA Status: Approved IMA 1994 (Dana # Added)
Help on Locality: Locality: Petalon Mountain, Andros Island, Cyclades, Greece. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after its discovery locality.
Help on Synonym: Synonym: Androsite
  Androsite-(La) - Renamed to Manganiandrosite-(La) - Recommended nomenclature of epidote-group minerals, Eur. J. Mineral. 2006, 18, 551-567.
  IMA1994-048
 

Manganiandrosite-(La) Image

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  Manganiandrosite-(La)

Comments: Orange glassy crystalline manganiandrosite-(La).
Location: Mt. Petalon, Andros Island, Cyclades, Greece. Scale: Thumbnail.
© Tom Loomis / Dakota Matrix

Manganiandrosite-(La) Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =1.559:1:1.767
Help on Cell Dimensions: Cell Dimensions: a = 8.896, b = 5.706, c = 10.083, Z = 2; beta = 113.88° V = 468.00 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): 2.895(1), 2.616(0.53), 3.506(0.41),
 

Physical Properties of Manganiandrosite-(La)

Help on Color: Color: Reddish brown.
Help on Density: Density: 4.21
Help on Diaphaneity: Diaphaneity: Transparent
Help on Luster: Luster: Vitreous (Glassy)
 

Optical Properties of Manganiandrosite-(La)

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.017 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.014 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2078,KPDmeas= 0.2083,KC= 0.2049
Ncalc = 1.86
Help on Optical Data: Optical Data: Biaxial (?), b=1.877
 

Calculated Properties of Manganiandrosite-(La)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.98 gm/cc
note: Specific Gravity of Manganiandrosite-(La) =4.22 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEManganiandrosite-(La) = 97.27 barns/electron
U=PEManganiandrosite-(La) x relectron= 387.34 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 18,922.41 (Gamma Ray American Petroleum Institute Units)
Concentration of Manganiandrosite-(La) per GRapi unit = 52.85 (PPM)

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

Estimated Radioactivity from Manganiandrosite-(La) - 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 421,099 1.14E-05 18,922.41 6.22
100 gm / 3.56 cm 42,110 1.14E-06 1,892.24 0.62
10 gm / 1.65 cm 4,211 1.14E-07 189.22 0.06
1 gm / 7.68 mm 421 1.14E-08 18.92 0.01
0.1 gm / 3.56 mm 42 1.14E-09 1.89 0.00
0.01 gm / 1.65 mm 4 1.14E-10 0.19 0.00
0.001 gm / 0.77 mm 0 1.14E-11 0.02 0.00

Weight of pure Manganiandrosite-(La) 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 ( 0.94 % Th) From Sum REE Elements (18.80 % REE)
 

Manganiandrosite-(La) Classification
Help on Dana Class: Dana Class: 58.02.01c.06 (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-(La) Information
Help on References: References: NAME( AmMin, Vol 81) PHYS. PROP.(Am.Min.,Vol.81,p735-742,1996) OPTIC PROP.(Am.Min.,Vol.81,p735-742,1996)
Help on See Also: See Also: Links to other databases for Manganiandrosite-(La) :
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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Manganiandrosite-(La)

(Mn,Ca)(La,Ce,Ca,Nd)AlMn+++Mn++(SiO4)(Si2O7)O(OH)
Dana No: 58.02.01c.06 Strunz No: 09.BG.05b
Locality:

 

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