Mineralogy Database

Khanneshite Mineral Data

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General Khanneshite Information

Help on Chemical  Formula: Chemical Formula: (NaCa)3(Ba,Sr,Ce,Ca)3(CO3)5
Help on Composition: Composition: Molecular Weight = 613.02 gm
   Barium     22.40 %  Ba   25.01 % BaO
   Sodium      8.44 %  Na   11.37 % Na2O
   Strontium   7.15 %  Sr    8.45 % SrO
   Calcium     6.21 %  Ca    8.69 % CaO
   Cerium      6.86 %  Ce    8.03 % Ce2O3
   Carbon      9.80 %  C    35.90 % CO2
   Oxygen     39.15 %  O
             ______        ______ 
             100.00 %       97.46 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na2.25Ca0.75BaSr0.5Ce0.3Ca0.2(CO3)5
Help on Environment: Environment: Disseminated in hydrothermally-altered fine-grained carbonatite.
Help on IMA Status: IMA Status: Approved IMA 1982
Help on Locality: Locality: Khanneshin carbonatite complex, Afghanistan, Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Khanneshite + Pronunciation Say KHANNESHITE
 

Khanneshite Image

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  Khanneshite

Comments: Vitreous orange massive khanneshite on single grain.
Location: Tuliylukht Bay, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia. Scale: See Image.
© Rruff Database

Khanneshite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:0.61784
Help on Cell Dimensions: Cell Dimensions: a = 10.65, c = 6.58, Z = 2; V = 646.33 Den(Calc)= 3.15
Help on Crystal System: Crystal System: Hexagonal - Dihexagonal Pyramidal H-M Symbol (6mm) Space Group: P 63mc
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.66(1), 3.08(0.62), 2.19(0.55),
 

Physical Properties of Khanneshite

Help on Cleavage: Cleavage: {???} Indistinct
Help on Color: Color: Light yellow.
Help on Density: Density: 3.8 - 3.9, Average = 3.84
Help on Diaphaneity: Diaphaneity: Transparent
Help on Hardness: Hardness: 3-4 - Calcite-Fluorite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Khanneshite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.067 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= -0.14 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1954,KPDmeas= 0.1599,KC= 0.1714
Ncalc = 1.54 - 1.67
Help on Optical Data: Optical Data: Uniaxial (-), e=1.609-1.61, w=1.62-1.623, bire=0.0110-0.0130.
 

Calculated Properties of Khanneshite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.59 gm/cc
note: Specific Gravity of Khanneshite =3.85 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.04
Boson Index = 0.96
Help on Photoelectric: Photoelectric: PEKhanneshite = 139.27 barns/electron
U=PEKhanneshite x relectron= 500.58 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 6,828.27 (Gamma Ray American Petroleum Institute Units)
Concentration of Khanneshite per GRapi unit = 146.45 (PPM)

Khanneshite is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram.

Estimated Radioactivity from Khanneshite - mild
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 / 7.92 cm 153,596 4.15E-06 6,828.27 2.24
100 gm / 3.67 cm 15,360 4.15E-07 682.83 0.22
10 gm / 1.71 cm 1,536 4.15E-08 68.28 0.02
1 gm / 7.92 mm 154 4.15E-09 6.83 0.00
0.1 gm / 3.67 mm 15 4.15E-10 0.68 0.00
0.01 gm / 1.71 mm 2 4.15E-11 0.07 0.00
0.001 gm / 0.79 mm 0 4.15E-12 0.01 0.00

Weight of pure Khanneshite in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.85 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 ( 0.34 % Th) From Sum REE Elements ( 6.86 % REE)
 

Khanneshite Classification

Help on  Dana Class: Dana Class: 14.04.04.02 (14)Anhydrous Carbonates
  (14.04)with Compound Formula A+2 B++2 (CO3)4
  (14.04.04)Burbankite Group (Hexagonal)
 
14.04.04.01 Burbankite (Na,Ca)3(Sr,Ba,Ce)3(CO3)5 P 63/mmc 6/m 2/m 2/m
 
14.04.04.02 Khanneshite (NaCa)3(Ba,Sr,Ce,Ca)3(CO3)5 P 63mc 6mm
 
14.04.04.03 Calcioburbankite Na3(Ca,REE,Sr)3(CO3)5 P 63mc 6mm
 
14.04.04.04 Sanromanite! Na2CaPb3(CO3)5 P 63mc 6mm
Help on  Strunz Class: Strunz Class: 05.AC.30 05 - CARBONATES (NITRATES)
  05.A - Carbonates without additional anions, without H2O
  05.AC -Alkali and alkali-earth carbonates
 
05.AC.30 Burbankite (Na,Ca)3(Sr,Ba,Ce)3(CO3)5 P 63/mmc 6/m 2/m 2/m
 
05.AC.30 Calcioburbankite Na3(Ca,REE,Sr)3(CO3)5 P 63mc 6mm
 
05.AC.30 Khanneshite (NaCa)3(Ba,Sr,Ce,Ca)3(CO3)5 P 63mc 6mm
 
05.AC.30 Sanromanite! Na2CaPb3(CO3)5 P 63mc 6mm
 

Other Khanneshite Information

Help on References: References: NAME( AntBidBlaNic3) 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 Khanneshite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Print or Cut-and-Paste your Khanneshite Specimen Label here :

Khanneshite

(NaCa)3(Ba,Sr,Ce,Ca)3(CO3)5
Dana No: 14.04.04.02 Strunz No: 05.AC.30
Locality:

 

Notes:

 

 
   
 


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