Laplandite-(Ce) Mineral Data

Laplandite-(Ce) Mineral Data +

[Newest Minerals] [Minerals for Sale] [Tsumeb Mine] [Mineral Auctions] [Mineral Gallery]
The Mineral Gallery's Exceptional Specimens and Mineral Hall of Fame
Visa and Mastercard are Welcome

General Laplandite-(Ce) Information

Chemical Formula:

Na4CeTiPSi7O22·5(H2O)

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

Empirical Formula:

Na₄CeTiPSi₇O₂₂·5(H₂O)

Environment:

In the natrolite zone of a pegmatite in a differentiated alkalic massif.

IMA Status:

Approved IMA 1987

Locality:

Yubileinaya pegmatite, Karnasurt Mt, Lovozero massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.

Name Origin:

Named for Lappland (Lapland), the region in which the Kola Peninsula lies.

Search for Laplandite-(Ce) Images

Images:

Image not yet available on Webmineral.com

Try searching images.google.com or Mindat Picture Gallary for mineral pictures. Caution: The images retrieved may not be appropriate.

Laplandite-(Ce) Crystallography

Axial Ratios:

a:b:c =0.5055:1:1.5472

Cell Dimensions:

a = 7.27, b = 14.38, c = 22.25, Z = 4; V = 2,326.07 Den(Calc)= 2.71

Crystal System:

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

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

By Intensity(I/I_o): 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)

Cleavage:

None

Color:

Bluish gray, Yellow gray, Light gray.

Density:

2.83

Diaphaniety:

Transparent to Translucent

Fracture:

Splintery - Thin, elongated fractures produced by intersecting good cleavages or partings (e.g. hornblende).

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Habit:

Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)

Hardness:

2-3 - Gypsum-Calcite

Luster:

Vitreous - Greasy

Streak:

white

Optical Properties of Laplandite-(Ce)

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

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)

Electron Density:

r_electron=2.64 gm/cc
note: r_{Laplandite-(Ce)}=2.71 gm/cc.

Fermion Index

Fermion Index = 0.0164
Boson Index = 0.9836

Photoelectric:

PE_{Laplandite-(Ce)}= 71.84 barns/electron
U=PE_{Laplandite-(Ce)} x r_electron= 189.85 barns/cc.

Radioactivity:

GRapi = 15,348.01 (Gamma Ray American Petroleum Institute Units)

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	15,348.01	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

Dana Class:

78.7.9.1 (78)Unclassified silicates

(78.7)wholly unclassified silicates

(78.7.9)Dana Group

78.7.9.1 Laplandite-(Ce) Na4CeTiPSi7O22·5(H2O) P mmm 2/m 2/m 2/m

Strunz Class:

VIII/G.11-10 VIII - Silicates

VIII/G - Intermediate between chain- and layered silicates

VIII/G.11 - Laplandite-(Ce) series

VIII/G.11-10 Laplandite-(Ce) Na4CeTiPSi7O22·5(H2O) P mmm 2/m 2/m 2/m

VIII/G.11-20 Seidite-(Ce)! Na4(Ce,Sr)2{Ti(OH)2(Si8O18)}(O,OH,F)4·5(H2O) C/2c 2/m

Other Laplandite-(Ce) Information

References:

NAME( AntBidBlaNic2) PHYS. PROP.(AntBidBlaNic2) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Laplandite-(Ce) :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (MinSocAm) 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas

Search for Laplandite-(Ce) using:

[ALTAVISTA] [AOL] [About.com] [All-The-Web] [HotBot] [Ixquick] [LookSmart] [MAMMA] [MSN.COM] [Netscape] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Laplandite-(Ce) :
AA Mineral Specimens
B and L Minerals
Dan Weinrich Fine Minerals
Dan Weinrich Auctions
e-Rocks Auctions
Excalibur Minerals
Exceptional Minerals
Fabre Minerals
Greenside Minerals
John Betts Fine Minerals
Masons Minerals
Minernet.it
Mineral News
Mineral of the Month Club
MineralsWeb Fine Minerals
Rockshop.cz Kalat Fine Minerals
T G Fine Minerals
Wrights Rock Shop

Translate Laplandite-(Ce) Mineral Data :

Ask about Laplandite-(Ce) here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

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

Laplandite-(Ce)

Na4CeTiPSi7O22·5(H2O)
Dana No: 78.7.9.1 Strunz No: VIII/G.11-10
Locality:

Notes: