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Mosandrite Mineral Data

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General Mosandrite Information

Help on Chemical  Formula: Chemical Formula: Na(Na,Ca)2(Ca,Ce,Y)4(Ti,Nb,Zr)(Si2O7)2(O,F)2F3
Help on Composition: Composition: Molecular Weight = 913.39 gm
   Sodium      5.03 %  Na    6.79 % Na2O
   Calcium    13.16 %  Ca   18.42 % CaO
   Cerium     23.01 %  Ce   26.95 % Ce2O3
   Yttrium     4.87 %  Y     6.18 % Y2O3
   Zirconium   1.00 %  Zr    1.35 % ZrO2
   Titanium    3.15 %  Ti    5.25 % TiO2
   Niobium     3.05 %  Nb    4.37 % Nb2O5
   Silicon    12.30 %  Si   26.31 % SiO2
   Oxygen     27.15 %  O
   Fluorine    7.28 %  F     7.28 % F
                -   %   F    -3.07 % -O=F2    
             ______        ______ 
             100.00 %       99.82 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na2Ca3Ce1.5Y0.5Ti0.6Nb0.3Zr0.1(Si2O7)2O1.5F3.5
Help on Environment: Environment: Alteration product of rinkite.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1841
Help on Locality: Locality: Langesundfiord region of southern Norway. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Carl Gustav Mosander (1797-1858), Swedish chemist and mineralogist, who discovered several REE elements.
Help on Synonym: Synonym: Johnstrupite
  Rinkite
  Rinkolite
 

Mosandrite Image

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  Mosandrite

Comments: Yellow to brown resinous crystalline mosandrite with black aegirine.
Location: Khibiny Massif, Kola Peninsula, Murmansk District, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Mosandrite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =3.2641:1:1.3173
Help on Cell Dimensions: Cell Dimensions: a = 18.41, b = 5.64, c = 7.43, Z = 2; beta = 93° V = 770.42 Den(Calc)= 3.94
Help on Crystal System: Crystal System: Monoclinic - Sphenoidal H-M Symbol (2) Space Group: P 21
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.053(1), 2.687(0.2), 3.561(0.15),
 

Physical Properties of Mosandrite

Help on Cleavage: Cleavage: {100} Good
Help on Color: Color: Yellow, Yellowish green, Reddish brown, Brown.
Help on Density: Density: 3.29
Help on Diaphaneity: Diaphaneity: Transparent to translucent
Help on Fracture: Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Hardness: Hardness: 4 - Fluorite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: yellow green
 

Optical Properties of Mosandrite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.019 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.149 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1652,KPDmeas= 0.1979,KC= 0.1942
Ncalc = 1.64 - 1.77
Help on Optical Data: Optical Data: Biaxial (+), a=1.646, b=1.649, g=1.658, bire=0.0120, 2V(Calc)=62, 2V(Meas)=43-87. Dispersion r > v strong.
 

Calculated Properties of Mosandrite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.09 gm/cc
note: Specific Gravity of Mosandrite =3.29 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEMosandrite = 127.84 barns/electron
U=PEMosandrite x relectron= 395.55 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 23,082.69 (Gamma Ray American Petroleum Institute Units)
Concentration of Mosandrite per GRapi unit = 43.32 (PPM)

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

Estimated Radioactivity from Mosandrite - 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 / 8.34 cm 515,428 1.39E-05 23,082.69 7.59
100 gm / 3.87 cm 51,543 1.39E-06 2,308.27 0.76
10 gm / 1.80 cm 5,154 1.39E-07 230.83 0.08
1 gm / 8.34 mm 515 1.39E-08 23.08 0.01
0.1 gm / 3.87 mm 52 1.39E-09 2.31 0.00
0.01 gm / 1.80 mm 5 1.39E-10 0.23 0.00
0.001 gm / 0.83 mm 1 1.39E-11 0.02 0.00

Weight of pure Mosandrite in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.29 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 ( 1.15 % Th) From Sum REE Elements (23.01 % REE)
 

Mosandrite Classification

Help on  Dana Class: Dana Class: 56.02.05.01 (56)Sorosilicate Si2O7 Groups and O, OH, F. and H2O
  (56.02)with cations in [4] and/or >[4] coordination
  (56.02.05)Mosandrite and related species
 
56.02.05.01 Mosandrite Na(Na,Ca)2(Ca,Ce,Y)4(Ti,Nb,Zr)(Si2O7)2(O,F)2F3 P 21 2
 
56.02.05.02 Nacareniobsite-(Ce) NbNa3Ca3(Ce,La)(Si2O7)2OF3 P 21/a 2/m
 
56.02.05.03 Fersmanite Ca4(Na,Ca)4(Ti,Nb)4(Si2O7)2O8F3 C 2/c 2/m
 
56.02.05.04 Gotzenite (Ca,Na)3(Ti,Al)Si2O7(F,OH)2 P1 1
 
56.02.05.05 Rinkite! Na(Na,Ca)2(Ca,Ce)4(Ti,Nb)(Si2O7)2(O,F)2 P 21 2
 
56.02.05.06 IMA2008-024! (Ca,Na,REE,[])7(Nb,Ti)[Si2O7]2OF3 Cc m
 
56.02.05.07 Dovyrenite! Ca6Zr[Si2O7]2(OH)4 Pnnm 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 09.BE.20 09 - SILICATES (Germanates)
  09.B - Sorosilicates
  09.BE -Si2O7 groups with additional anions;
 
09.BE.20 Nacareniobsite-(Ce) NbNa3Ca3(Ce,La)(Si2O7)2OF3 P 21/a 2/m
 
09.BE.20 Mosandrite Na(Na,Ca)2(Ca,Ce,Y)4(Ti,Nb,Zr)(Si2O7)2(O,F)2F3 P 21 2
 
09.BE.20 Rinkite! Na(Na,Ca)2(Ca,Ce)4(Ti,Nb)(Si2O7)2(O,F)2 P 21 2
 
09.BE.20 IMA2008-024! (Ca,Na,REE,[])7(Nb,Ti)[Si2O7]2OF3 Cc m
 

Other Mosandrite Information

Help on References: References: NAME( Ford32) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Ford32)
Help on See Also: See Also: Links to other databases for Mosandrite :
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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Print or Cut-and-Paste your Mosandrite Specimen Label here :

Mosandrite

Na(Na,Ca)2(Ca,Ce,Y)4(Ti,Nb,Zr)(Si2O7)2(O,F)2F3
Dana No: 56.02.05.01 Strunz No: 09.BE.20
Locality:

 

Notes:

 

 
   
 


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