Steenstrupine-(Ce) Mineral Data

Steenstrupine-(Ce) Mineral Data
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General Steenstrupine-(Ce) Information

Help on Chemical Formula: Chemical Formula: Na14Ce6Mn++Mn+++Fe++2(Zr,Th)(Si6O18)2(PO4)7•3(H2O)
Help on Composition: Composition: Molecular Weight = 3,142.39 gm
   Sodium      10.24 %  Na   13.81 % Na2O
   Cerium      26.75 %  Ce   31.34 % Ce2O3
   Thorium      1.85 %  Th    2.10 % ThO2
   Zirconium    2.18 %  Zr    2.94 % ZrO2
   Manganese    3.50 %  Mn    2.26 % MnO /  2.51 % Mn2O3
   Iron         3.55 %  Fe    4.57 % FeO
   Silicon     10.73 %  Si   22.94 % SiO2
   Phosphorus   6.90 %  P    15.81 % P2O5
   Hydrogen     0.19 %  H     1.72 % H2O
   Oxygen      34.11 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na14Ce6Mn2+Mn3+Fe2+2Zr0.75Th0.25(Si6O18)2(PO4)7·3(H2O)
Help on Environment: Environment: Charateristic mineral associated with ultra-agpaitic pegmatites of nepheline syenites and sodalite syenites.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1881
Help on Locality: Locality: Kangerdluarsuc, Julianehaab district, Greenland. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Name for Knud Hohannes Vogelius Steenstrup (1842-1913), geologist, Copenhagen, Denmark.
Help on Name Pronunciation: Name Pronunciation: Steenstrupine-(Ce) + Pronunciation Say STEENSTRUPINE-(CE)
 

Steenstrupine-(Ce) Image

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Steenstrupine-(Ce)

Comments: Dark gray, coarse grained, elongated crystals of steenstrupine-(Ce) in matrix.
Location: Kvanefield, Ilimanssaq, Greenland. Scale: Specimen Size 5.6 cm.
© Paul M. Schumacher

Steenstrupine-(Ce) Crystallography
Help on Axial Ratios: Axial Ratios: a:c = 1:4.34789
Help on Cell Dimensions: Cell Dimensions: a = 10.46, c = 45.479, Z = 3; V = 4,309.28 Den(Calc)= 3.63
Help on Crystal System: Crystal System: Trigonal - Hexagonal ScalenohedralH-M Symbol (3 2/m) Space Group: R 3m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.87(1), 3.09(1), 4.2(0.7),
Click Here for Large Steenstrupine-(Ce) Structure Window Crystal Structure:

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Moore P B , Shen J , Tschermaks Mineralogische und Petrographische Mitteilungen , 31 (1983) p.47-67, Crystal structure of steenstrupine: A rod structure of unusual complexity

 

Physical Properties of Steenstrupine-(Ce)

Help on Cleavage: Cleavage: None
Help on Color: Color: Brown red, Dark brown, Black.
Help on Density: Density: 3.4
Help on Diaphaneity: Diaphaneity: Opaque
Help on Fracture: Fracture: Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).
Help on Habit: Habit: Blocky - Crystal shape tends to be equant (e.g. feldspars).
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: 4 - Fluorite
Help on Luster: Luster: Sub Metallic
Help on Streak: Streak: tan
 

Optical Properties of Steenstrupine-(Ce)

Help on Dichroism (e): Dichroism (e): yellow brown.
Help on Dichroism (w): Dichroism (w): dark brown.
Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.06 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= 0.007 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1829,KPDmeas= 0.1953,KC= 0.1842
Ncalc = 1.63 - 1.67
Help on Optical Data: Optical Data: Uniaxial (-), e=1.66-1.663, w=1.665-1.668, bire=0.0050.
 

Calculated Properties of Steenstrupine-(Ce)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.40 gm/cc
note: Specific Gravity of Steenstrupine-(Ce) =3.63 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0083691069
Boson Index = 0.9916308931
Help on Photoelectric: Photoelectric: PESteenstrupine-(Ce) = 179.31 barns/electron
U=PESteenstrupine-(Ce) x relectron= 609.59 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 36,883.05 (Gamma Ray American Petroleum Institute Units)
Concentration of Steenstrupine-(Ce) per GRapi unit = 27.11 (PPM)

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

Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 10 cm box) 824.68 ±206.17 grams of pure Steenstrupine-(Ce) .

Estimated Radioactivity from Steenstrupine-(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 / 8.07 cm 827,021 2.24E-05 36,883.05 12.13
100 gm / 3.75 cm 82,702 2.24E-06 3,688.31 1.21
10 gm / 1.74 cm 8,270 2.24E-07 368.83 0.12
1 gm / 8.07 mm 827 2.24E-08 36.88 0.01
0.1 gm / 3.75 mm 83 2.24E-09 3.69 0.00
0.01 gm / 1.74 mm 8 2.24E-10 0.37 0.00
0.001 gm / 0.81 mm 1 2.24E-11 0.04 0.00

Weight of pure Steenstrupine-(Ce) in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.63 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
 

Steenstrupine-(Ce) Classification
Help on Dana Class: Dana Class: 61.04.02.01 (61)Cyclosilicate Six-Membered Rings
  (61.04)with other anions
  (61.04.02)Steenstrupine group
 
61.04.02.01 Steenstrupine-(Ce) Na14Ce6MnMnFe2(Zr,Th)(Si6O18)2(PO4)7•3(H2O) R 3m 3 2/m
 
61.04.02.02 Thorosteenstrupine (Ca,Th,Mn)3Si4O11F•6(H2O) None
Help on Strunz Class: Strunz Class: 09.CK.20 09 - SILICATES (Germanates)
  09.C - Cyclosilicates
  09.CK -[Si6O18]12- 6-membered single rings, with insular complex anions
 
09.CK.20 Thorosteenstrupine (Ca,Th,Mn)3Si4O11F•6(H2O) None
 
09.CK.20 Steenstrupine-(Ce) Na14Ce6MnMnFe2(Zr,Th)(Si6O18)2(PO4)7•3(H2O) R 3m 3 2/m
 

Other Steenstrupine-(Ce) Information
Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Steenstrupine-(Ce) :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Athena
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info

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Print or Cut-and-Paste your Steenstrupine-(Ce) Specimen Label here :

Steenstrupine-(Ce)

Na14Ce6Mn++Mn+++Fe++2(Zr,Th)(Si6O18)2(PO4)7•3(H2O)
Dana No: 61.04.02.01 Strunz No: 09.CK.20
Locality:

 

Notes: