Nordite-(Ce) Mineral Data

General Nordite-(Ce) Information

Chemical Formula:

(Ce,La,Ca)(Sr,Ca)Na2(Na,Mn)(Zn,Mg)Si6O17

Composition:

Molecular Weight = 763.83 gm

Sodium 8.43 % Na 11.36 % Na₂O

Strontium 5.74 % Sr 6.78 % SrO

Calcium 2.62 % Ca 3.67 % CaO

Lanthanum 5.46 % La 6.40 % La₂O₃

Cerium 11.01 % Ce 12.89 % Ce₂O₃

Magnesium 0.95 % Mg 1.58 % MgO

Manganese 2.88 % Mn 3.71 % MnO

Zinc 3.42 % Zn 4.26 % ZnO

Iron 2.19 % Fe 0.94 % FeO / 2.09 % Fe₂O₃

Silicon 21.69 % Si 46.41 % SiO₂

Oxygen 35.61 % O

______ ______

100.00 % 100.10 % = TOTAL OXIDE

Empirical Formula:

Na_2.8Mn²⁺_0.2Sr_0.5Ca_0.5La_0.3Ce_0.6Zn_0.4Mg_0.3Mn²⁺_0.2Fe²⁺_0.1Si_5.9Fe³⁺_0.2O₁₇

Environment:

Sodalite syenite pegmatite.

IMA Status:

Approved IMA 1958

Locality:

Near the Chinglusuai River and Motchusuai River, Lovozero Massif, Kola Pininuula, Russia. Link to MinDat.org Location Data.

Name Origin:

Analog to the La-dominant nordite-(La) which was named after the word for north because of its northern origin in the Lovozero Massif.

Name Pronunciation:

Nordite-(Ce)

Nordite-(Ce) Image

Images:

Nordite-(Ce)

Comments: Brownish rosette of nordite-(Ce) with visible single crystal morphology. Associated minerals are white etched natrosilite and minor black prismatic aegirine.
Location: Palitra pegmatite (Palette pegmatite), Kedykverpakhk Mt, Lovozero Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia. Scale: Crystal Size 4 mm.
© Pavel M. Kartashov

Nordite-(Ce) Crystallography

Axial Ratios:

a:b:c =2.7307:1:3.7307

Cell Dimensions:

a = 14.2, b = 5.2, c = 19.4, Z = 8; V = 1,432.50 Den(Calc)= 7.08

Crystal System:

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

Physical Properties of Nordite-(Ce)

Cleavage:

{010} Distinct

Color:

Light brown, Dark brown, Blackish brown.

Density:

6.43 - 6.49, Average = 6.46

Diaphaneity:

Translucent

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Habit:

Fibrous - Crystals made up of fibers.

Habit:

Lamellar - Thin laminae producing a lamellar structure.

Hardness:

5 - Apatite

Luster:

Vitreous - Greasy

Streak:

light brown

Optical Properties of Nordite-(Ce)

Gladstone-Dale:

CI meas= 0.481 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.526 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.0896,KPDmeas= 0.0982,KC= 0.1893
Ncalc = 2.22 - 2.34

Optical Data:

Biaxial (-), a=1.619-1.621, b=1.63-1.64, g=1.642-1.655, bire=0.0230-0.0340, 2V(Calc)=82-90, 2V(Meas)=<30.

Calculated Properties of Nordite-(Ce)

Electron Density:

Bulk Density (Electron Density)=6.15 gm/cc
note: Specific Gravity of Nordite-(Ce) =6.46 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Nordite-(Ce)= 88.84 barns/electron
U=PE_Nordite-(Ce) x r_electron= 546.55 barns/cc.

Radioactivity:

GRapi = 16,721.77 (Gamma Ray American Petroleum Institute Units)
Concentration of Nordite-(Ce) per GRapi unit = 59.80 (PPM)

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

**Estimated Radioactivity from Nordite-(Ce)** - 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 / 6.66 cm	368,745	9.97E-06	16,721.77	5.50
100 gm / 3.09 cm	36,875	9.97E-07	1,672.18	0.55
10 gm / 1.44 cm	3,687	9.97E-08	167.22	0.05
1 gm / 6.66 mm	369	9.97E-09	16.72	0.01
0.1 gm / 3.09 mm	37	9.97E-10	1.67	0.00
0.01 gm / 1.44 mm	4	9.97E-11	0.17	0.00
0.001 gm / 0.67 mm	0	9.97E-12	0.02	0.00

Weight of pure Nordite-(Ce) in grams (gm) and Calculated Diameter of a Sphere with a Density of 6.46 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 (16.46 % REE)

Nordite-(Ce) Classification

Dana Class:

72.05.02.02 (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

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-(Ce) Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)

See Also:

Links to other databases for Nordite-(Ce) :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Athena
5 - EUROmin Project
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info

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Nordite-(Ce)

(Ce,La,Ca)(Sr,Ca)Na2(Na,Mn)(Zn,Mg)Si6O17
Dana No: 72.05.02.02 Strunz No: 09.DO.15
Locality:

Notes:

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