Ferronordite-(La) Mineral Data

Ferronordite-(La) Mineral Data +

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General Ferronordite-(La) Information

Chemical Formula:

Na3Sr(La,Ce)FeSi6O17

Composition:

Molecular Weight = 800.84 gm

Barium 0.34 % Ba 0.38 % BaO

Sodium 8.41 % Na 11.34 % Na₂O

Strontium 10.83 % Sr 12.81 % SrO

Calcium 0.40 % Ca 0.56 % CaO

Lanthanum 9.71 % La 11.39 % La₂O₃

Cerium 7.00 % Ce 8.20 % Ce₂O₃

Praeseodymium 0.88 % Pr 1.03 % Pr₂O₃

Magnesium 0.18 % Mg 0.30 % MgO

Manganese 1.92 % Mn 2.48 % MnO

Aluminum 0.07 % Al 0.13 % Al₂O₃

Zinc 1.88 % Zn 2.34 % ZnO

Iron 2.93 % Fe 3.77 % FeO

Silicon 20.76 % Si 44.42 % SiO₂

Neodymium 0.72 % Nd 0.84 % Nd₂O₃

Oxygen 33.96 % O

______ ______

100.00 % 99.98 % = TOTAL OXIDE

Empirical Formula:

Na_2.93Ca_0.08Sr_0.99Ba_0.02La_0.56Ce_0.4Pr_0.05Nd_0.04Fe²⁺_0.42Mn²⁺_0.28Zn_0.23Mg_0.06Si_5.92Al_0.02O₁₇

Environment:

Hyperagpaitic pegmatites. Nordite group

IMA Status:

Approved IMA 2002 (Dana # Added)

Locality:

Mt Bol'shoy Punkaruaiv Mountain, Lovozero massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.

Name Origin:

La dominant analog of ferronordite-(Ce).

Synonym:

IMA2000-015

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Ferronordite-(La) Crystallography

Axial Ratios:

a:b:c =2.7817:1:3.8258

Cell Dimensions:

a = 14.44, b = 5.191, c = 19.86, Z = 4; V = 1,488.67 Den(Calc)= 3.57

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pcca

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 4.21(1)(210), 2.873(0.99)(314), 2.964(0.88)(410),3.323(0.82)(312), 2.595(0.58)(020), 2.442(0.44), 7.2(0.4),

Physical Properties of Ferronordite-(La)

Cleavage:

[100] Perfect

Color:

Colorless, Pale brownish white.

Density:

3.54

Diaphaniety:

Transparent

Fracture:

Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.

Habit:

Spherical - Spherical, rounded aggregates.

Hardness:

5 - Apatite

Luster:

Vitreous - Greasy

Streak:

white

Optical Properties of Ferronordite-(La)

Gladstone-Dale:

CI meas= 0.014 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.022 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1779,KPDmeas= 0.1794,KC= 0.182

Optical Data:

Biaxial (-), a=1.624, b=1.637, g=1.644, bire=0.0200, 2V(Calc)=72, 2V(Meas)=60. Dispersion weak, r > v.

Calculated Properties of Ferronordite-(La)

Electron Density:

r_electron=3.34 gm/cc
note: r_{Ferronordite-(La)}=3.54 gm/cc.

Fermion Index

Fermion Index = 0.02119
Boson Index = 0.97881

Photoelectric:

PE_{Ferronordite-(La)}= 104.13 barns/electron
U=PE_{Ferronordite-(La)} x r_electron= 347.71 barns/cc.

Radioactivity:

GRapi = 18,425.37 (Gamma Ray American Petroleum Institute Units)

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

**Estimated Radioactivity from Ferronordite-(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 / 8.14 cm	410,185	1.11E-05	18,425.37	6.06
100 gm / 3.78 cm	41,019	1.11E-06	1,842.54	0.61
10 gm / 1.75 cm	4,102	1.11E-07	184.25	0.06
1 gm / 8.14 mm	410	1.11E-08	18.43	0.01
0.1 gm / 3.78 mm	41	1.11E-09	1.84	0.00
0.01 gm / 1.75 mm	4	1.11E-10	0.18	0.00
0.001 gm / 0.81 mm	0	1.11E-11	0.02	0.00

Weight of pure Ferronordite-(La) in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.54 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 ( 0.92 % Th) From Sum REE Elements (18.31 % REE)

Ferronordite-(La) Classification

Dana Class:

72.5.2.7 (72)Phyllosilicate Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings

(72.5)with corrugated and complex layers

(72.5.2)Leucospenite and related species

72.5.2.1 Leucosphenite Na4BaTi2O2[B2Si10O28] C 2/m 2/m

72.5.2.2 Nordite-(Ce) (Ce,La,Ca)(Sr,Ca)Na2(Na,Mn)(Zn,Mg)Si6O17 Pcca 2/m 2/m 2/m

72.5.2.3 Nordite-(La) (Na,Mn)3(Sr,Ca)(La,Ce)(Zn,Mg)Si6O17 Pcca 2/m 2/m 2/m

72.5.2.4 Semenovite (Na,Ca)9(Ce,La)2(Fe,Mn)(Si,Be)20(O,OH,F)48 Pmmn 2/m 2/m 2/m

72.5.2.5 Ferronordite-(Ce)! Na3SrCeFeSi6O17 Pcca 2/m 2/m 2/m

72.5.2.6 Manganonordite-(Ce)! Na3SrCeMnSi6O17 Pcca 2/m 2/m 2/m

72.5.2.7 Ferronordite-(La) ! Na3Sr(La,Ce)FeSi6O17 Pcca 2/m 2/m 2/m

Strunz Class:

VIII/G.03-45 VIII - Silicates

VIII/G - Intermediate between chain- and layered silicates

VIII/G.03 - Semenovite-(Ce) - Nordite-(La) series

VIII/G.03-10 Semenovite (Na,Ca)9(Ce,La)2(Fe,Mn)(Si,Be)20(O,OH,F)48 Pmmn 2/m 2/m 2/m

VIII/G.03-20 Nordite-(Ce) (Ce,La,Ca)(Sr,Ca)Na2(Na,Mn)(Zn,Mg)Si6O17 Pcca 2/m 2/m 2/m

VIII/G.03-30 Nordite-(La) (Na,Mn)3(Sr,Ca)(La,Ce)(Zn,Mg)Si6O17 Pcca 2/m 2/m 2/m

VIII/G.03-40 Ferronordite-(Ce)! Na3SrCeFeSi6O17 Pcca 2/m 2/m 2/m

VIII/G.03-45 Ferronordite-(La) Na3Sr(La,Ce)FeSi6O17 Pcca 2/m 2/m 2/m

VIII/G.03-50 Manganonordite-(Ce)! Na3SrCeMnSi6O17 Pcca 2/m 2/m 2/m

Other Ferronordite-(La) Information

References:

NAME( AmMin, 87:1510) PHYS. PROP.(AmMin, 87:1510) OPTIC PROP.(AmMin, 87:1510)

See Also:

Links to other databases for Ferronordite-(La) :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch) 9 -QUT Mineral Atlas

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Ferronordite-(La)

Na3Sr(La,Ce)FeSi6O17
Dana No: 72.5.2.7 Strunz No: VIII/G.03-45
Locality:

Notes: