Kukharenkoite-(La) Mineral Data

General Kukharenkoite-(La) Information

Chemical Formula:

Ba2(La,Ce)(CO3)3F

Composition:

Molecular Weight = 605.99 gm

Potassium 0.26 % K 0.31 % K₂O

Barium 39.88 % Ba 44.53 % BaO

Sodium 0.19 % Na 0.26 % Na₂O

Strontium 2.02 % Sr 2.39 % SrO

Calcium 0.73 % Ca 1.02 % CaO

Lanthanum 9.63 % La 11.29 % La₂O₃

Cerium 4.62 % Ce 5.42 % Ce₂O₃

Praeseodymium 0.70 % Pr 0.82 % Pr₂O₃

Thorium 8.42 % Th 9.59 % ThO₂

Carbon 5.89 % C 21.57 % CO₂

Neodymium 0.71 % Nd 0.83 % Nd₂O₃

Oxygen 23.52 % O

Fluorine 3.42 % F 3.42 % F

- % F -1.44 % -O=F₂

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ba_1.76Sr_0.14K_0.04La_0.42Th_0.22Ce_0.2Ca_0.11Na_0.05Pr_0.03Nd_0.03(CO₃)_2.97F_1.09

Environment:

Late hydrothermal assemblege in cavities in pegmatites. La-dominant analogue of kukharenkoite-(Ce); structure determined.

IMA Status:

Approved IMA 2003 (Dana # Added)

Locality:

Kirovsky mine, Mount Kukisvumchorr, Khibina massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.

Name Origin:

Named as the La dominant analogue of kukharenkoite-Ce).

Name Pronunciation:

Kukharenkoite-(La) + Pronunciation

Synonym:

IMA2002-019

Kukharenkoite-(La) Image

Images:

Kukharenkoite-(La)

Comments: Very small olive-green sprays of kukharenkoite-(La) crystals.
Location: Kirovsky apatite mine, Mount Kukisvumchorr, Khibina massif, Kola Peninsula, Russia.. Scale: Crystal Size to 0.02 cm.
© Jeff Weissman / Photographic Guide to Mineral Species

Kukharenkoite-(La) Crystallography

Axial Ratios:

a:b:c =2.621:1:1.3054

Cell Dimensions:

a = 13.396, b = 5.111, c = 6.672, Z = 2; beta = 106.63° V = 437.70 Den(Calc)= 4.60

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): 3.27(1)(310,401,202), 4.01(1)(111,201), 1.998(0.8)(421,222,511, 2.14(0.8)(221,512,600), 2.54(0.5)(020,112), 1.636(0.2), 2.38(0.2), 1.37(0.2)(910,424,712,71

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Krivovichev S V , Armbruster T , Pekov I V , Zapiski Vserossijskogo Mineralogicheskogo Obshchestva , 132N3 (2003) p.65-72, Cation frameworks in structure of natural fluocarbonates of barium and, rare-earth elements: crystal structure of kukharenkoite-(La), Ba2(La,Ce)(CO3)3F

Physical Properties of Kukharenkoite-(La)

Cleavage:

None

Color:

Pale leek green, Colorless, White.

Diaphaneity:

Transparent to Translucent

Fracture:

Brittle - Uneven - Very brittle fracture producing uneven fragments.

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Habit:

Lath - Shaped like a small, thin plaster lath, tabular (rectangular) in shape.

Habit:

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

Hardness:

4 - Fluorite

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Kukharenkoite-(La)

Gladstone-Dale:

CI calc= 0.051 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1457,KC= 0.1536
Ncalc = 1.71

Optical Data:

Biaxial (-), a=1.581, b=1.715, g=1.715, bire=0.1340, 2V(Calc)=0, 2V(Meas)=5. Dispersion dispersion not observed.

Calculated Properties of Kukharenkoite-(La)

Electron Density:

Bulk Density (Electron Density)=4.03 gm/cc
note: Specific Gravity of Kukharenkoite-(La) =4.60 gm/cc.

Fermion Index:

Fermion Index = 0.07
Boson Index = 0.93

Photoelectric:

PE_{Kukharenkoite-(La)}= 467.67 barns/electron
U=PE_{Kukharenkoite-(La)} x r_electron=1,883.01 barns/cc.

Radioactivity:

GRapi = 157,305.67 (Gamma Ray American Petroleum Institute Units)
Concentration of Kukharenkoite-(La) per GRapi unit = 6.36 (PPM)

Kukharenkoite-(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) 193.36 ± 48.34 grams of pure Kukharenkoite-(La) .

**Estimated Radioactivity from Kukharenkoite-(La)** - strong
Specimen Size Weight/Volume (Sphere) *	Calculated Activity Becquerels (Bq)	Calculated Activity Curies (Ci)	Estimated Activity GR(api)	Estimated Exposure (mRem**)/hr If Held in Hand For One Hour
1000 gm / 7.46 cm	3,774,039	1.02E-04	157,305.67	51.72
100 gm / 3.46 cm	377,404	1.02E-05	15,730.57	5.17
10 gm / 1.61 cm	37,740	1.02E-06	1,573.06	0.52
1 gm / 7.46 mm	3,774	1.02E-07	157.31	0.05
0.1 gm / 3.46 mm	377	1.02E-08	15.73	0.01
0.01 gm / 1.61 mm	38	1.02E-09	1.57	0.00
0.001 gm / 0.75 mm	4	1.02E-10	0.16	0.00

Weight of pure Kukharenkoite-(La) in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.60 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

Kukharenkoite-(La) Classification

Dana Class:

16a.01.08.03 (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-(La) Information

References:

NAME( CanMin, v 42, p 928) PHYS. PROP.(CanMin, v 42, p 928) OPTIC PROP.(CanMin, v 42, p 928)

See Also:

Links to other databases for Kukharenkoite-(La) :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

Search for Kukharenkoite-(La) using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Kukharenkoite-(La) :

A Bijoux Google Search for Kukharenkoite-(La)
Adam's Minerals Google Search for Kukharenkoite-(La)
Cape Minerals Google Search for Kukharenkoite-(La)
Dakota Matrix Minerals Google Search for Kukharenkoite-(La)
Excalibur Mineral Corp. Google Search for Kukharenkoite-(La)
Exceptional Minerals Google Search for Kukharenkoite-(La)
John Betts Fine Minerals Search for Kukharenkoite-(La)
McDougall Minerals Google Search for Kukharenkoite-(La)
Mineral News Website Link
Rock and Mineral Shows Google Search for Kukharenkoite-(La)
Weinrich Minerals, Inc. Google Search for Kukharenkoite-(La)

Ask about Kukharenkoite-(La) 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 Kukharenkoite-(La) Specimen Label here :

Kukharenkoite-(La)

Ba2(La,Ce)(CO3)3F
Dana No: 16a.01.08.03 Strunz No: 05.BD.10
Locality:

Notes: