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Nordite-(La) Mineral Data

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General Nordite-(La) Information

Help on Chemical  Formula: Chemical Formula: (Na,Mn)3(Sr,Ca)(La,Ce)(Zn,Mg)Si6O17
Help on Composition: Composition: Molecular Weight = 763.59 gm
   Sodium      8.43 %  Na   11.36 % Na2O
   Strontium   5.74 %  Sr    6.79 % SrO
   Calcium     2.62 %  Ca    3.67 % CaO
   Lanthanum   9.10 %  La   10.67 % La2O3
   Cerium      7.34 %  Ce    8.60 % Ce2O3
   Magnesium   0.95 %  Mg    1.58 % MgO
   Manganese   2.88 %  Mn    3.72 % MnO
   Zinc        3.43 %  Zn    4.26 % ZnO
   Iron        2.19 %  Fe    0.94 % FeO /  2.09 % Fe2O3
   Silicon    21.70 %  Si   46.43 % SiO2
   Oxygen     35.62 %  O
             ______        ______ 
             100.00 %      100.10 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na2.8Mn2+0.2Sr0.5Ca0.5La0.5Ce0.4Zn0.4Mg0.3Mn2+0.2Fe2+0.1Si5.9Fe3+0.2O17
Help on Environment: Environment: Pegmatite in sodalite syenite in a differentiated alkalic massif.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1941
Help on Locality: Locality: Near the Chinglusuai River, Lovozero Massif, Kola Pininuula, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after the word for north because of its northern origin in the Lovozero Massif.
Help on Name Pronunciation: Name Pronunciation: Nordite-(La) Say NORDITE-(LA)
Help on Synonym: Synonym: ICSD 15179
  PDF 41-584
 

Nordite-(La) Image

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  Nordite-(La)   Magnesio-arfvedsonite

Comments: Large tabular crystal of brownish nordite-(La). Accessory minerals are white chalky natrolite and black prismatic magnesioarfvedsonite.
Location: Kirovskii apatite mine (Kirovsky Mine; Kirov Mine), Kukisvumchorr Mt, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia. Scale: FOV is 12x10 mm.
© Pavel M. Kartashov

Nordite-(La) Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =2.7807:1:3.8208
Help on Cell Dimensions: Cell Dimensions: a = 14.468, b = 5.203, c = 19.88, Z = 4; V = 1,496.51 Den(Calc)= 3.39
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pcca
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.86(1), 2.95(1), 1.764(0.8),
 

Physical Properties of Nordite-(La)

Help on Cleavage: Cleavage: {100} Good
Help on Color: Color: Light brown, Dark brown, Blackish brown.
Help on Density: Density: 3.43 - 3.48, Average = 3.45
Help on Diaphaneity: Diaphaneity: Translucent
Help on Fracture: Fracture: Conchoidal - Uneven - Uneven fracture producing small, conchoidal fragments.
Help on Habit: Habit: Fibrous - Crystals made up of fibers.
Help on Habit: Habit: Metamict - Mineral originally crystalline, now amorphous due to radiation damage.
Help on Habit: Habit: Tabular - Form dimensions are thin in one direction.
Help on Hardness: Hardness: 5-6 - Between Apatite and Orthoclase
Help on Luster: Luster: Vitreous - Greasy
Help on Streak: Streak: light brown
 

Optical Properties of Nordite-(La)

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.034 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.015 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1866,KPDmeas= 0.1831,KC= 0.1894
Ncalc = 1.64 - 1.66
Help on Optical Data: Optical Data: Biaxial (-), a=1.619-1.62, b=1.63-1.64, g=1.642-1.644, bire=0.0230-0.0240, 2V(Calc)=46-90, 2V(Meas)=31-32.
 

Calculated Properties of Nordite-(La)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.23 gm/cc
note: Specific Gravity of Nordite-(La) =3.39 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PENordite-(La) = 87.52 barns/electron
U=PENordite-(La) x relectron= 282.49 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 16,690.98 (Gamma Ray American Petroleum Institute Units)
Concentration of Nordite-(La) per GRapi unit = 59.91 (PPM)

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

Estimated Radioactivity from Nordite-(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 / 8.26 cm 368,152 9.95E-06 16,690.98 5.49
100 gm / 3.83 cm 36,815 9.95E-07 1,669.10 0.55
10 gm / 1.78 cm 3,682 9.95E-08 166.91 0.05
1 gm / 8.26 mm 368 9.95E-09 16.69 0.01
0.1 gm / 3.83 mm 37 9.95E-10 1.67 0.00
0.01 gm / 1.78 mm 4 9.95E-11 0.17 0.00
0.001 gm / 0.83 mm 0 9.95E-12 0.02 0.00

Weight of pure Nordite-(La) in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.39 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 ( 0.82 % Th) From Sum REE Elements (16.44 % REE)
 

Nordite-(La) Classification

Help on  Dana Class: Dana Class: 72.05.02.03 (72)Phyllosilicate Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings
  (72.05)with corrugated and complex layers
  (72.05.02)Leucospenite and related species
 
72.05.02.01 Leucosphenite Na4BaTi2O2[B2Si10O28] C 2/m 2/m
 
72.05.02.02 Nordite-(Ce) (Ce,La,Ca)(Sr,Ca)Na2(Na,Mn)(Zn,Mg)Si6O17 Pcca 2/m 2/m 2/m
 
72.05.02.03 Nordite-(La) (Na,Mn)3(Sr,Ca)(La,Ce)(Zn,Mg)Si6O17 Pcca 2/m 2/m 2/m
 
72.05.02.04 Semenovite (Na,Ca)9(Ce,La)2(Fe,Mn)(Si,Be)20(O,OH,F)48 Pmmn 2/m 2/m 2/m
 
72.05.02.05 Ferronordite-(Ce)! Na3SrCeFeSi6O17 Pcca 2/m 2/m 2/m
 
72.05.02.06 Manganonordite-(Ce)! Na3SrCeMnSi6O17 Pcca 2/m 2/m 2/m
 
72.05.02.07 Ferronordite-(La)! Na3Sr(La,Ce)FeSi6O17 Pcca 2/m 2/m 2/m
 
72.05.02.08 Bussyite-(Ce)! (Ce,REE)3(Na,H2O)6MnSi9Be5(O,OH)30F4 C 2/c 2/m
Help on  Strunz Class: Strunz Class: 09.DO.15 09 - SILICATES (Germanates)
  09.D - Inosilicates* Structural terminology according to Liebau (1985)
  09.DO -Inosilicates with 7-, 8-, 10-, 12- and 14-periodic chains
 
09.DO.15 Manganonordite-(Ce)! Na3SrCeMnSi6O17 Pcca 2/m 2/m 2/m
 
09.DO.15 Ferronordite-(Ce)! Na3SrCeFeSi6O17 Pcca 2/m 2/m 2/m
 
09.DO.15 Nordite-(Ce) (Ce,La,Ca)(Sr,Ca)Na2(Na,Mn)(Zn,Mg)Si6O17 Pcca 2/m 2/m 2/m
 
09.DO.15 Nordite-(La) (Na,Mn)3(Sr,Ca)(La,Ce)(Zn,Mg)Si6O17 Pcca 2/m 2/m 2/m
 
09.DO.15 Ferronordite-(La)! Na3Sr(La,Ce)FeSi6O17 Pcca 2/m 2/m 2/m
 

Other Nordite-(La) Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic2)
Help on See Also: See Also: Links to other databases for Nordite-(La) :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - GeoScienceWorld
5 - Google Images
6 - Google Scholar
7 - MinDAT
8 - Mineralienatlas (Deutsch)
9 - Online Mineral Museum
10 - QUT Mineral Atlas
11 - Ruff.Info
12 - WWW-MINCRYST

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Print or Cut-and-Paste your Nordite-(La) Specimen Label here :

Nordite-(La)

(Na,Mn)3(Sr,Ca)(La,Ce)(Zn,Mg)Si6O17
Dana No: 72.05.02.03 Strunz No: 09.DO.15
Locality:

 

Notes:

 

 
   
 


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