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Iraqite-(La) Mineral Data

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General Iraqite-(La) Information

Help on Chemical  Formula: Chemical Formula: K(La,Ce,Th)2(Ca,Na)4(Si,Al)16O40
Help on Composition: Composition: Molecular Weight = 1,634.63 gm
   Potassium   2.63 %  K     3.17 % K2O
   Sodium      0.28 %  Na    0.38 % Na2O
   Calcium     8.58 %  Ca   12.01 % CaO
   Lanthanum   5.95 %  La    6.98 % La2O3
   Cerium      6.00 %  Ce    7.03 % Ce2O3
   Thorium     9.94 %  Th   11.31 % ThO2
   Aluminum    0.50 %  Al    0.94 % Al2O3
   Silicon    26.98 %  Si   57.71 % SiO2
   Oxygen     39.15 %  O
             ______        ______ 
             100.00 %       99.51 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: K1.1La0.7Ce0.7Th0.7Ca3.5Na0.2Si15.7Al0.3O40
Help on Environment: Environment: In granite in contact with dolomitic marble containing olivine and diopside.
Help on IMA Status: IMA Status: Approved IMA 1976
Help on Locality: Locality: At Shakhi-Rash Mountain, Hero Town, Qala-Diza, Iraq. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: For the country of origin, Iraq and La in the composition.
Help on Name Pronunciation: Name Pronunciation: Iraqite-(La) Say IRAQITE-(LA)
Help on Synonym: Synonym: Desourdyite
  Ekanite
 

Iraqite-(La) Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:1.94086
Help on Cell Dimensions: Cell Dimensions: a = 7.61, c = 14.77, Z = 1; V = 855.36 Den(Calc)= 3.17
Help on Crystal System: Crystal System: Tetragonal - Ditetragonal Dipyramidal H-M Symbol (4/m 2/m 2/m) Space Group: P 4/mcc
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.64(1), 3.31(1), 5.28(1),
 

Physical Properties of Iraqite-(La)

Help on Cleavage: Cleavage: {???} Good, {???} Good, {???} Poor
Help on Color: Color: Greenish yellow.
Help on Density: Density: 3.27
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Habit: Habit: Anhedral Grains - Granular minerals without the expression of crystal shapes
Help on Habit: Habit: Massive - Uniformly indistinguishable crystals forming large masses.
Help on Hardness: Hardness: 4.5 - Between Fluorite and Apatite
Help on Luster: Luster: Earthy (Dull)
Help on Streak: Streak: white
 

Optical Properties of Iraqite-(La)

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.071 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= 0.042 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1853,KPDmeas= 0.1797,KC= 0.1934
Ncalc = 1.61 - 1.63
Help on Optical Data: Optical Data: Uniaxial (-), e=1.585, w=1.59, bire=0.0050.
 

Calculated Properties of Iraqite-(La)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.03 gm/cc
note: Specific Gravity of Iraqite-(La) =3.17 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEIraqite-(La) = 277.20 barns/electron
U=PEIraqite-(La) x relectron= 838.94 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 202,416.06 (Gamma Ray American Petroleum Institute Units)
Concentration of Iraqite-(La) per GRapi unit = 4.94 (PPM)

Iraqite-(La) 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) 150.27 ± 37.57 grams of pure Iraqite-(La) .

Estimated Radioactivity from Iraqite-(La) - strong
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 / 8.45 cm 4,452,387 1.20E-04 202,416.06 66.55
100 gm / 3.92 cm 445,239 1.20E-05 20,241.61 6.65
10 gm / 1.82 cm 44,524 1.20E-06 2,024.16 0.67
1 gm / 8.45 mm 4,452 1.20E-07 202.42 0.07
0.1 gm / 3.92 mm 445 1.20E-08 20.24 0.01
0.01 gm / 1.82 mm 45 1.20E-09 2.02 0.00
0.001 gm / 0.84 mm 4 1.20E-10 0.20 0.00

Weight of pure Iraqite-(La) in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.17 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
 

Iraqite-(La) Classification

Help on  Dana Class: Dana Class: 63.01.01.02 (63)Cyclosilicate Condensed Rings
  (63.01)4-membered rings
  (63.01.01)Steacyite Group
 
63.01.01.01 Steacyite K1-x(Ca,Na)2ThSi8O20(x=0.2to0.4) P 4/mcc 4/m 2/m 2/m
 
63.01.01.02 Iraqite-(La) K(La,Ce,Th)2(Ca,Na)4(Si,Al)16O40 P 4/mcc 4/m 2/m 2/m
 
63.01.01.03 Turkestanite! Th(Ca,Na)2(K1-x,[]x)Si8O20•n(H2O) P 4/mcc 4/m 2/m 2/m
 
63.01.01.04 Arapovite! (U,Th)(Ca,Na)2(K1-x[]x)Si8O20•H2O,x=0.5 P 4/mcc 4/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 09.CH.10 09 - SILICATES (Germanates)
  09.C - Cyclosilicates
  09.CH -[Si4O12]8- 4-membered double rings
 
09.CH.10 Iraqite-(La) K(La,Ce,Th)2(Ca,Na)4(Si,Al)16O40 P 4/mcc 4/m 2/m 2/m
 
09.CH.10 Steacyite K1-x(Ca,Na)2ThSi8O20(x=0.2to0.4) P 4/mcc 4/m 2/m 2/m
 
09.CH.10 Turkestanite! Th(Ca,Na)2(K1-x,[]x)Si8O20•n(H2O) P 4/mcc 4/m 2/m 2/m
 
09.CH.10 Arapovite! (U,Th)(Ca,Na)2(K1-x[]x)Si8O20•H2O,x=0.5 P 4/mcc 4/m 2/m 2/m
 

Other Iraqite-(La) Information

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

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Print or Cut-and-Paste your Iraqite-(La) Specimen Label here :

Iraqite-(La)

K(La,Ce,Th)2(Ca,Na)4(Si,Al)16O40
Dana No: 63.01.01.02 Strunz No: 09.CH.10
Locality:

 

Notes:

 

 
   
 


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