IMA2002-042a Mineral Data

IMA2002-042a Mineral Data

General IMA2002-042a Information

Chemical Formula:

Na3La[Si6O15]·2(H2O)

Composition:

Molecular Weight = 652.41 gm

Sodium 10.57 % Na 14.25 % Na₂O

Lanthanum 21.29 % La 24.97 % La₂O₃

Silicon 25.83 % Si 55.26 % SiO₂

Hydrogen 0.62 % H 5.52 % H₂O

Oxygen 41.69 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Na₃LaSi₆O₁₅·2(H₂O)

Environment:

La-dominant analogue of sazhinite

IMA Status:

Proposed IMA 2004 (Dana # Added)

Locality:

Aris intrusion, Namibia Link to MinDat.org Location Data.

Name Origin:

Commission on New Minerals and Mineral Names (CNMMN)

Search for IMA2002-042a 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.

IMA2002-042a Crystallography

Axial Ratios:

a:b:c =0.4779:1:0.4617

Cell Dimensions:

a = 7.415, b = 15.515, c = 7.164, Z = 2; V = 824.17 Den(Calc)= 2.63

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pmm2

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

By Intensity(I/I_o): 3.411(1), 3.252(0.83), 5.26(0.68),5.36(0.6), 7.42(0.59), 6.5(0.48), 3.226(0.45), 3.345(0.45),

Optical Properties of IMA2002-042a

Optical Data:

NCalc= 1.52 - from Gladstone-Dale relationship (KC = 0.1977) where Ncalc=Dcalc*KC+1

Calculated Properties of IMA2002-042a

Electron Density:

r_electron=2.53 gm/cc
note: r_IMA2002-042a=2.63 gm/cc.

Fermion Index

Fermion Index = 0.01245
Boson Index = 0.98755

Photoelectric:

PE_IMA2002-042a= 96.30 barns/electron
U=PE_IMA2002-042a x r_electron= 243.80 barns/cc.

Radioactivity:

GRapi = 21,860.87 (Gamma Ray American Petroleum Institute Units)

IMA2002-042a is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram.

**Estimated Radioactivity from IMA2002-042a** - 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 / 8.99 cm	476,922	1.29E-05	21,860.87	7.19
100 gm / 4.17 cm	47,692	1.29E-06	2,186.09	0.72
10 gm / 1.94 cm	4,769	1.29E-07	218.61	0.07
1 gm / 8.99 mm	477	1.29E-08	21.86	0.01
0.1 gm / 4.17 mm	48	1.29E-09	2.19	0.00
0.01 gm / 1.94 mm	5	1.29E-10	0.22	0.00
0.001 gm / 0.90 mm	0	1.29E-11	0.02	0.00

Weight of pure IMA2002-042a in grams (gm) and Calculated Diameter of a Sphere with a Density of 2.63 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
Estimated Thorium Activity ( 1.06 % Th) From Sum REE Elements (21.29 % REE)

IMA2002-042a Classification

Dana Class:

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

(72.2)with 4-, 6-, and 8-membered rings

(72.2.1)Dalylite group

72.2.1.1 Dalyite K2ZrSi6O15 P1 1

72.2.1.2 Davanite K2TiSi6O15 P1 1

72.2.1.3 Sazhinite-(Ce) Na2Ce[Si6O14(OH)]·n(H2O),(n>=1.5) Pmm2 mm2

72.2.1.4 IMA2002-042a ! Na3La[Si6O15]·2(H2O) Pmm2 2/m 2/m 2/m

Strunz Class:

VIII/HX.00-00 VIII - Silicates

VIII/HX - Unclassified Strunz Phyllosilicates

VIII/HX.00 - Dalylite group

Other IMA2002-042a Information

See Also:

Links to other databases for IMA2002-042a :
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)

Search for IMA2002-042a using:

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

Visit our Advertisers for IMA2002-042a :
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 IMA2002-042a Mineral Data :

Ask about IMA2002-042a 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 IMA2002-042a Specimen Label here :

IMA2002-042a

Na3La[Si6O15]·2(H2O)
Dana No: 72.2.1.4 Strunz No: VIII/HX.00-00
Locality:

Notes: