Kukharenkoite-(Ce) Mineral Data

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General Kukharenkoite-(Ce) Information

Chemical Formula:

Ba2Ce(CO3)3F

Composition:

Molecular Weight = 613.80 gm

Barium 44.75 % Ba 49.96 % BaO

Cerium 22.83 % Ce 26.74 % Ce₂O₃

Carbon 5.87 % C 21.51 % CO₂

Oxygen 23.46 % O

Fluorine 3.10 % F 3.10 % F

- % F -1.30 % -O=F₂

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ba₂Ce(CO₃)₃F

Environment:

Alkaline igneous rocks.

IMA Status:

Approved IMA 1996 (Dana # Added)

Locality:

Khibina alkaline massif, Kola peninsula, Russia; Vuorijarvi alkaline massif, Kola peninsula, Russia; Mont Saint-Hilare alkaline complex, Rouville County, Quebec, Canada. Link to MinDat.org Location Data.

Name Origin:

Named for Prof. Alexander A. Kukharenko (1914-1993), Department of Mineralogy, St. Petersburg University, St. Petersburg, Russia.

Name Pronunciation:

Kukharenkoite-(Ce) + Pronunciation

Synonym:

ICSD 85572

IMA1995-040

PDF 81-1079

Kukharenkoite-(Ce) Image

Images:

Kukharenkoite-(Ce)

Comments: White-tan crystals of kukharenkoite-(Ce).
Location: Kirovskii (Kirovsky) apatite mine, Mt Kukisvumchorr, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag

Kukharenkoite-(Ce) Crystallography

Axial Ratios:

a:b:c =2.6431:1:1.3223

Cell Dimensions:

a = 13.406, b = 5.072, c = 6.707, Z = 2; beta = 106.566° V = 437.11 Den(Calc)= 4.66

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/m

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

By Intensity(I/I_o): 3.269(1), 2.003(0.4), 2.14(0.4),

Crystal Structure:

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drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
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Krivovichev S V , Filatov S K , Zaitsev A N , The Canadian Mineralogist , 36 (1998) p.809-815, The crystal structure of kukharenkoite-(Ce), Ba2REE(CO3)3F,and an interpretation, based on cation-coordinated F tetrahedra

Physical Properties of Kukharenkoite-(Ce)

Cleavage:

None

Color:

Yellow, Reddish brown, Colorless, White, Pinkish gray.

Density:

4.61 - 4.7, Average = 4.65

Diaphaneity:

Transparent to translucent to opaque

Fracture:

Brittle - Uneven - Very brittle fracture producing uneven fragments.

Habit:

Dendritic - Branching "tree-like" growths of great complexity (e.g. pyrolusite).

Habit:

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

Habit:

Stellate - Occurs as spherical, radial aggregates radiating from a "star" like point.

Hardness:

4.5 - Between Fluorite and Apatite

Luster:

Vitreous - Greasy

Streak:

white

Optical Properties of Kukharenkoite-(Ce)

Gladstone-Dale:

CI meas= 0.028 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.029 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.145,KPDmeas= 0.1452,KC= 0.1493
Ncalc = 1.69 - 1.7

Optical Data:

Biaxial (-), a=1.584-1.594, b=1.71-1.724, g=1.715-1.728, bire=0.1310-0.1340, 2V(Calc)=18-20, 2V(Meas)=16. Dispersion r > v moderate.

Calculated Properties of Kukharenkoite-(Ce)

Electron Density:

Bulk Density (Electron Density)=4.08 gm/cc
note: Specific Gravity of Kukharenkoite-(Ce) =4.66 gm/cc.

Fermion Index:

Fermion Index = 0.08
Boson Index = 0.92

Photoelectric:

PE_{Kukharenkoite-(Ce)}= 324.96 barns/electron
U=PE_{Kukharenkoite-(Ce)} x r_electron=1,325.88 barns/cc.

Radioactivity:

GRapi = 21,342.66 (Gamma Ray American Petroleum Institute Units)
Concentration of Kukharenkoite-(Ce) per GRapi unit = 46.85 (PPM)

Kukharenkoite-(Ce) is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram.

**Estimated Radioactivity from Kukharenkoite-(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 / 7.43 cm	511,339	1.38E-05	21,342.66	7.02
100 gm / 3.45 cm	51,134	1.38E-06	2,134.27	0.70
10 gm / 1.60 cm	5,113	1.38E-07	213.43	0.07
1 gm / 7.43 mm	511	1.38E-08	21.34	0.01
0.1 gm / 3.45 mm	51	1.38E-09	2.13	0.00
0.01 gm / 1.60 mm	5	1.38E-10	0.21	0.00
0.001 gm / 0.74 mm	1	1.38E-11	0.02	0.00

Weight of pure Kukharenkoite-(Ce) in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.66 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 ( 1.14 % Th) From Sum REE Elements (22.83 % REE)

Kukharenkoite-(Ce) Classification

Dana Class:

16a.01.08.02 (16a)Carbonates - Hydroxyl or Halogen

(16a.01)in the Bastnasite/Shynchysite/Parasite Groups

(16a.01.08)Dana Group

16a.01.08.01 Zhonghuacerite-(Ce) Ba2Ce(CO3)3F P 2₁/m 2/m

16a.01.08.02 Kukharenkoite-(Ce)! Ba2Ce(CO3)3F P 2₁/m 2/m

16a.01.08.03 Kukharenkoite-(La)! Ba2(La,Ce)(CO3)3F P 2₁/m 2/m

Strunz Class:

05.BD.10 05 - CARBONATES (NITRATES)

05.B - Carbonates with additional anions, without H2O

05.BD -With rare-earth elements (REE)

05.BD.10 Kukharenkoite-(Ce)! Ba2Ce(CO3)3F P 2₁/m 2/m

05.BD.10 Zhonghuacerite-(Ce) Ba2Ce(CO3)3F P 2₁/m 2/m

05.BD.10 Kukharenkoite-(La)! Ba2(La,Ce)(CO3)3F P 2₁/m 2/m

Other Kukharenkoite-(Ce) Information

References:

NAME( MinRec) PHYS. PROP.(Eur. J. Min.,Vol.8,1996) OPTIC PROP.(MinRec)

See Also:

Links to other databases for Kukharenkoite-(Ce) :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Athena
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - MinMax(Deutsch)
10 - MinMax(English)
11 - Mineralienatlas (Deutsch)
12 - QUT Mineral Atlas
13 - Ruff.Info
14 - WWW-MINCRYST

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

Kukharenkoite-(Ce)

Ba2Ce(CO3)3F
Dana No: 16a.01.08.02 Strunz No: 05.BD.10
Locality:

Notes: