Mineralogy Database

Laplandite-(Ce) Mineral Data

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General Laplandite-(Ce) Information

Help on Chemical Formula: Chemical Formula: Na4CeTiPSi7O22•5(H2O)
Help on Composition: Composition: Molecular Weight = 949.59 gm
   Sodium       9.68 %  Na   13.05 % Na2O
   Cerium      14.76 %  Ce   17.28 % Ce2O3
   Titanium     5.04 %  Ti    8.41 % TiO2
   Silicon     20.70 %  Si   44.29 % SiO2
   Phosphorus   3.26 %  P     7.47 % P2O5
   Hydrogen     1.06 %  H     9.49 % H2O
   Oxygen      45.49 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na4CeTiPSi7O22•5(H2O)
Help on Environment: Environment: In the natrolite zone of a pegmatite in a differentiated alkalic massif.
Help on IMA Status: IMA Status: Approved IMA 1987
Help on Locality: Locality: Yubileinaya pegmatite, Karnasurt Mt, Lovozero massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Lappland (Lapland), the region in which the Kola Peninsula lies.
Help on Name Pronunciation: Name Pronunciation: Laplandite-(Ce) + Pronunciation Say LAPLANDITE-(CE)
 

Laplandite-(Ce) Image

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  Laplandite-(Ce)

Comments: Grayish-white radial aggregates of laplandite-(Ce).
Location: Yubileinaya pegmatite, Karnasurt Mt, Lovozero Massif, Kola Peninsula, Russia. Scale: Picture Size 3 mm.
© Diederik Visser

Laplandite-(Ce) Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.5055:1:1.5472
Help on Cell Dimensions: Cell Dimensions: a = 7.27, b = 14.38, c = 22.25, Z = 4; V = 2,326.07 Den(Calc)= 2.71
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P mmm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.03(1), 7.27(1), 3.76(1),3.35(1), 2.8(0.8), 3.36(0.8), 6.47(0.7),
 

Physical Properties of Laplandite-(Ce)

Help on Cleavage: Cleavage: None
Help on Color: Color: Bluish gray, Yellow gray, Light gray.
Help on Density: Density: 2.83
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Fracture: Fracture: Splintery - Thin, elongated fractures produced by intersecting good cleavages or partings (e.g. hornblende).
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Habit: Habit: Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Help on Hardness: Hardness: 2-3 - Gypsum-Calcite
Help on Luster: Luster: Vitreous - Greasy
Help on Streak: Streak: white
 

Optical Properties of Laplandite-(Ce)

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.073 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= 0.032 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2137,KPDmeas= 0.2046,KC= 0.2208
Ncalc = 1.6 - 1.62
Help on Optical Data: Optical Data: Biaxial (-), a=1.568, b=1.584, g=1.585, bire=0.0170, 2V(Calc)=26, 2V(Meas)=28.
 

Calculated Properties of Laplandite-(Ce)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.64 gm/cc
note: Specific Gravity of Laplandite-(Ce) =2.71 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PELaplandite-(Ce) = 71.84 barns/electron
U=PELaplandite-(Ce) x relectron= 189.85 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 15,348.02 (Gamma Ray American Petroleum Institute Units)
Concentration of Laplandite-(Ce) per GRapi unit = 65.16 (PPM)

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

Estimated Radioactivity from Laplandite-(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 / 8.90 cm 330,519 8.93E-06 15,348.02 5.05
100 gm / 4.13 cm 33,052 8.93E-07 1,534.80 0.50
10 gm / 1.92 cm 3,305 8.93E-08 153.48 0.05
1 gm / 8.90 mm 331 8.93E-09 15.35 0.01
0.1 gm / 4.13 mm 33 8.93E-10 1.53 0.00
0.01 gm / 1.92 mm 3 8.93E-11 0.15 0.00
0.001 gm / 0.89 mm 0 8.93E-12 0.02 0.00

Weight of pure Laplandite-(Ce) in grams (gm) and Calculated Diameter of a Sphere with a Density of 2.71 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 ( 0.74 % Th) From Sum REE Elements (14.76 % REE)
 

Laplandite-(Ce) Classification
Help on Dana Class: Dana Class: 78.07.09.01 (78)Unclassified silicates
  (78.07)wholly unclassified silicates
  (78.07.09)Dana Group
 
78.07.09.01 Laplandite-(Ce) Na4CeTiPSi7O22•5(H2O) P mmm 2/m 2/m 2/m
Help on Strunz Class: Strunz Class: 09.DJ.10 09 - SILICATES (Germanates)
  09.D - Inosilicates* Structural terminology according to Liebau (1985)
  09.DJ -Inosilicates with 4-periodic double and triple chains
 
09.DJ.10 Laplandite-(Ce) Na4CeTiPSi7O22•5(H2O) P mmm 2/m 2/m 2/m
 

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

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

Laplandite-(Ce)

Na4CeTiPSi7O22•5(H2O)
Dana No: 78.07.09.01 Strunz No: 09.DJ.10
Locality:

 

Notes:

 
 
   
 

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