Khanneshite Mineral Data + Say KHANNESHITE


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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 IMA Status: IMA Status: Approved IMA 1982
Help on Locality: Locality: Link to MinDat.org Location Data.
 

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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 PyramidalH-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 Diaphaniety: Diaphaniety: 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
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:

relectron=3.59 gm/cc
note: rKhanneshite =3.85 gm/cc.
Help on Fermion Index Fermion Index Fermion Index = 0.04627
Boson Index = 0.95373
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)

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: 14.4.4.2 (14)Anhydrous Carbonates
  (14.4)with Compound Formula A+2 B++2 (CO3)4
  (14.4.4)Burbankite Group (Hexagonal)
 
14.4.4.1 Burbankite (Na,Ca)3(Sr,Ba,Ce)3(CO3)5 P 63/mmc 6/m 2/m 2/m
 
14.4.4.2 Khanneshite (NaCa)3(Ba,Sr,Ce,Ca)3(CO3)5 P 63mc 6mm
 
14.4.4.3 Calcioburbankite Na3(Ca,REE,Sr)3(CO3)5 P 63mc 6mm
Help on Strunz Class: Strunz Class: V/B.05-110 V - Nitrates, Carbonates and Borates
  V/B - Waterfree carbonates [CO3]2- without unfamiliar anions
  V/B.05 - Eitelie - Shortite - Carbocernaite series
 
V/B.05-10 Eitelite Na2Mg(CO3)2 R 3 3
 
V/B.05-20 Nyerereite Na2Ca(CO3)2 C mc21 mm2
 
V/B.05-30 Natrofairchildite Na2Ca(CO3)2 P 63/mmc 6/m 2/m 2/m
 
V/B.05-40 Gregoryite (Na2,K2,Ca)CO3 P 63mc 6mm
 
V/B.05-50 Fairchildite K2Ca(CO3)2 P 63/mmc 6/m 2/m 2/m
 
V/B.05-55 Zemkorite (Na,K)2Ca(CO3)2 P 63/mmc, P 63mc, P 62c- Hex
 
V/B.05-60 Butschliite K2Ca(CO3)2 R 3m 3 2/m
 
V/B.05-70 Shortite Na2Ca2(CO3)3 Amm2 mm2
 
V/B.05-80 Sahamalite-(Ce) (Mg,Fe)Ce2(CO3)4 P 21/a 2/m
 
V/B.05-90 Remondite-(Ce) Na3(Ce,La,Ca,Na,Sr)3(CO3)5 P 21 2
 
V/B.05-92 Remondite-(La)! Na3(La,Ce,Ca)3(CO3)5 P 21 2
 
V/B.05-95 Petersenite-(Ce) (Na,Ca)4(Ce,La,Nd)2(CO3)5 P 21 2
 
V/B.05-98 Calcioburbankite Na3(Ca,REE,Sr)3(CO3)5 P 63mc 6mm
 
V/B.05-100 Burbankite (Na,Ca)3(Sr,Ba,Ce)3(CO3)5 P 63/mmc 6/m 2/m 2/m
 
V/B.05-110 Khanneshite (NaCa)3(Ba,Sr,Ce,Ca)3(CO3)5 P 63mc 6mm
 
V/B.05-120 Carbocernaite (Ca,Na)(Sr,Ce,Ba)(CO3)2 P mc21 mm2
 

Other Khanneshite Information
Help on References: References: 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 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 -École des Mines de Paris

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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: 14.4.4.2 Strunz No: V/B.05-110
Locality:

 

Notes:

 
 
   
 
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