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Proshchenkoite-(Y) Mineral Data

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General Proshchenkoite-(Y) Information

Help on Chemical  Formula: Chemical Formula: (Y,REE,Ca,Na,Mn)15Fe++Ca(P,Si)Si6B3(O,F)48
Help on Composition: Composition: Molecular Weight = 2,711.51 gm
   Sodium            0.98 %  Na    1.33 % Na2O
   Calcium           3.77 %  Ca    5.27 % CaO
   La,Ce,Pr,Nd,Sm,  40.04 %  RE   46.72 % REE2O3
   Yttrium          12.13 %  Y    15.41 % Y2O3
   Thorium           0.86 %  Th    0.97 % ThO2
   Titanium          0.04 %  Ti    0.06 % TiO2
   Manganese         1.86 %  Mn    2.41 % MnO
   Iron              1.71 %  Fe    2.20 % FeO
   Silicon           6.54 %  Si   13.98 % SiO2
   Boron             1.28 %  B     4.11 % B2O3
   Arsenic           0.11 %  As    0.17 % As2O5
   Phosphorus        0.80 %  P     1.83 % P2O5
   Lead              0.08 %  Pb    0.08 % PbO
   Oxygen           20.39 %  O
   Fluorine          9.42 %  F     9.42 % F
                      -   %   F    -3.97 % -O=F2    
                   ______        ______ 
                   100.00 %       99.99 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Y3.7REE7.54Ca1.55Na1.16Mn2+0.77Th0.1Pb0.01Fe2+0.83Mn2+0.15Ti0.02CaP0.7As0.04Si0.26 Si6.05B3.2O34.55F13.45
Help on Environment: Environment: Vicanite group
Help on IMA Status: IMA Status: Approved IMA 2008 (Dana # Added)
Help on Locality: Locality: Tommot REE-Nb deposit, Yakutia, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Commission on New Minerals, Nomenclature and Classification (CNMNC)
Help on Synonym: Synonym: IMA2008-007
 

Proshchenkoite-(Y) Image

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  Proshchenkoite-(Y)

Comments: Brown grains of proshchenkoite-(Y) on filter paper used for XRD analysis.
Location: Tommot, Yakutia, Russia. Scale: Grain Size 0.3 mm.
© Thomas Witzke

Proshchenkoite-(Y) Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:2.54821
Help on Cell Dimensions: Cell Dimensions: a = 10.7527, c = 27.4002, Z = 3; V = 2,743.59 Den(Calc)= 4.92
Help on Crystal System: Crystal System: Trigonal - Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.968(1), 3.144(0.77), 3.028(0.45),4.441(0.36), 1.713(0.32), 1.782(0.32), 1.806(0.3), 2.672(0.3),
 

Physical Properties of Proshchenkoite-(Y)

Help on Color: Color: Brown.
Help on Density: Density: 4.72
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Brittle - Irregular - Very brittle fracture producing irregular fragments
Help on Habit: Habit: Metamict - Mineral originally crystalline, now amorphous due to radiation damage.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Hardness: Hardness: 5 - Apatite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Proshchenkoite-(Y)

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.017 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.057 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1486,KPDmeas= 0.1549,KC= 0.1575
Ncalc = 1.74 - 1.77
Help on Optical Data: Optical Data: Uniaxial (-), e=1.728, w=1.734, bire=0.0060.
 

Calculated Properties of Proshchenkoite-(Y)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.30 gm/cc
note: Specific Gravity of Proshchenkoite-(Y) =4.72 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.08
Boson Index = 0.92
Help on Photoelectric: Photoelectric: PEProshchenkoite-(Y) = 287.38 barns/electron
U=PEProshchenkoite-(Y) x relectron=1,237.08 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 16,789.40 (Gamma Ray American Petroleum Institute Units)
Concentration of Proshchenkoite-(Y) per GRapi unit = 59.56 (PPM)

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

Estimated Radioactivity from Proshchenkoite-(Y) - 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 / 7.40 cm 386,597 1.04E-05 16,789.40 5.52
100 gm / 3.43 cm 38,660 1.04E-06 1,678.94 0.55
10 gm / 1.59 cm 3,866 1.04E-07 167.89 0.06
1 gm / 7.40 mm 387 1.04E-08 16.79 0.01
0.1 gm / 3.43 mm 39 1.04E-09 1.68 0.00
0.01 gm / 1.59 mm 4 1.04E-10 0.17 0.00
0.001 gm / 0.74 mm 0 1.04E-11 0.02 0.00

Weight of pure Proshchenkoite-(Y) in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.72 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
 

Proshchenkoite-(Y) Classification

Help on  Dana Class: Dana Class: 54.03.01.03 (54)Nesosilicate Borosilicates and Some Beryllosilicates
  (54.03)Dana Type
  (54.03.01)Vicanite Group
 
54.03.01.01 Vicanite-(Ce) (Ca,Ce,La,Th)15As(As0.5,Na0.5)FeSi6B4O40F7 R 3m 3m
 
54.03.01.02 Hundholmenite-(Y)! (Y,REE,Ca,Na)15(Al,Fe)CaxAs1-x(Si,As)Si6B3(O,F)48 R 3m 3m
 
54.03.01.03 Proshchenkoite-(Y)! (Y,REE,Ca,Na,Mn)15FeCa(P,Si)Si6B3(O,F)48 R 3m 3m
Help on  Strunz Class: Strunz Class: 09.AJ.35 09 - SILICATES (Germanates)
  09.A - Nesosilicates
  09.AJ -Nesosilicates with BO3 triangles and/or B[4], Be[4] tetrahedra,
 
09.AJ.35 Okanoganite-(Y) (Na,Ca)3(Y,Ce)12Si6B2O27F14 R 3m 3m
 
09.AJ.35 Vicanite-(Ce) (Ca,Ce,La,Th)15As(As0.5,Na0.5)FeSi6B4O40F7 R 3m 3m
 
09.AJ.35 Hundholmenite-(Y)! (Y,REE,Ca,Na)15(Al,Fe)CaxAs1-x(Si,As)Si6B3(O,F)48 R 3m 3m
 
09.AJ.35 Proshchenkoite-(Y)! (Y,REE,Ca,Na,Mn)15FeCa(P,Si)Si6B3(O,F)48 R 3m 3m
 

Other Proshchenkoite-(Y) Information

Help on References: References: NAME( MinMag, v72:1017) PHYS. PROP.(MinMag, v72:1017) OPTIC PROP.(MinMag, v72:1017)
Help on See Also: See Also: Links to other databases for Proshchenkoite-(Y) :
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 Proshchenkoite-(Y) Specimen Label here :

Proshchenkoite-(Y)

(Y,REE,Ca,Na,Mn)15Fe++Ca(P,Si)Si6B3(O,F)48
Dana No: 54.03.01.03 Strunz No: 09.AJ.35
Locality:

 

Notes:

 

 
   
 


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