Burbankite Mineral Data

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General Burbankite Information

Chemical Formula:

(Na,Ca)3(Sr,Ba,Ce)3(CO3)5

Composition:

Molecular Weight = 706.03 gm

Barium 17.51 % Ba 19.55 % BaO

Sodium 7.16 % Na 9.66 % Na₂O

Strontium 22.34 % Sr 26.42 % SrO

Calcium 4.54 % Ca 6.35 % CaO

Cerium 5.95 % Ce 6.97 % Ce₂O₃

Carbon 8.51 % C 31.17 % CO₂

Oxygen 33.99 % O

______ ______

100.00 % 100.11 % = TOTAL OXIDE

Empirical Formula:

Na_2.2Ca_0.8Sr_1.8Ba_0.9Ce_0.3(CO₃)₅

Environment:

Accessory mineral in carbonatites.

IMA Status:

Valid Species (Pre-IMA) 1955

Locality:

Vermiculite prospects at the head of Big Sandy Creek, Rocky Boy’s Indian Reservation, about 40 km east of Box Elder, Hill Co., Montana, USA. Link to MinDat.org Location Data.

Name Origin:

Named for Wilbur Sweet Burbank (1898-1975), geologist of the U.S. Geological Survey.

Name Pronunciation:

Burbankite + Pronunciation

Synonym:

ICSD 30949

PDF 26-1374

Burbankite Image

Images:

Burbankite

Comments: White crystal of burbankite (see arrow) and bluish green fluorite on matrix.
Location: Pocos de Caldes, Minas Gerais, Brazil. Scale: Crystal size 2 mm.
© John Veevaert

Images:

Burbankite

Comments: Yellow massive burbankite.
Location: Big Sandy Creek, near Rocky Boy, Big Bear Paw Mountains, Hill County, Montana, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Burbankite Crystallography

Axial Ratios:

a:c = 1:0.61443

Cell Dimensions:

a = 10.53, c = 6.47, Z = 2; V = 621.29 Den(Calc)= 3.77

Crystal System:

Hexagonal - Dihexagonal DipyramidalH-M Symbol (6/m 2/m 2/m) Space Group: P 6₃/mmc

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

By Intensity(I/I_o): 2.639(1), 3.041(0.8), 5.28(0.7),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
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H - Help Screen
I - Data Info
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Belovitskaya Yu V , Pekov I V , Kabalov Yu K , Crystallography Reports , 45 (2000) p.26-29, Refinement of the crystal structures of low-rare-earth, and typical burbankites by the Rietveld method, Locality: Khibiny Massif, Kola Peninsula, Russia, Sample: B-108, Note: x02 adjusted to satisfy symmetry constraints

View Additional jPOWD Structure files for Burbankite
[1]

Physical Properties of Burbankite

Cleavage:

{100} Distinct

Color:

Colorless, Grayish yellow, Orange, Pink.

Density:

3.5

Diaphaneity:

Transparent to Translucent

Hardness:

3.5 - Copper Penny

Luminescence:

Fluorescent, Short UV=pink.

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Burbankite

Dichroism (e):

colorless.

Dichroism (w):

colorless.

Gladstone-Dale:

CI meas= -0.039 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.036 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1647,KPDmeas= 0.1774,KC= 0.1708
Ncalc = 1.6 - 1.64

Optical Data:

Uniaxial (?), a=1.615, b=1.627, bire=0.0120.

Calculated Properties of Burbankite

Electron Density:

Bulk Density (Electron Density)=3.49 gm/cc
note: Specific Gravity of Burbankite =3.77 gm/cc.

Fermion Index:

Fermion Index = 0.04
Boson Index = 0.96

Photoelectric:

PE_Burbankite= 131.97 barns/electron
U=PE_Burbankite x r_electron= 460.00 barns/cc.

Radioactivity:

GRapi = 5,871.73 (Gamma Ray American Petroleum Institute Units)
Concentration of Burbankite per GRapi unit = 170.31 (PPM)

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

**Estimated Radioactivity from Burbankite** - 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 / 7.97 cm	133,361	3.60E-06	5,871.73	1.93
100 gm / 3.70 cm	13,336	3.60E-07	587.17	0.19
10 gm / 1.72 cm	1,334	3.60E-08	58.72	0.02
1 gm / 7.97 mm	133	3.60E-09	5.87	0.00
0.1 gm / 3.70 mm	13	3.60E-10	0.59	0.00
0.01 gm / 1.72 mm	1	3.60E-11	0.06	0.00
0.001 gm / 0.80 mm	0	3.60E-12	0.01	0.00

Weight of pure Burbankite in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.77 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 ( 0.30 % Th) From Sum REE Elements ( 5.95 % REE)

Burbankite Classification

Dana Class:

14.04.04.01 (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

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 Burbankite Information

References:

NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990;www.saint-hilaire.ca) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Burbankite :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Amethyst Galleries' Mineral Gallery
5 - Athena
6 - EUROmin Project
7 - Ecole des Mines de Paris
8 - Google Images
9 - Google Scholar
10 - Handbook of Mineralogy (MinSocAm)
11 - Handbook of Mineralogy (UofA)
12 - MinDAT
13 - MinMax(Deutsch)
14 - MinMax(English)
15 - Mineralienatlas (Deutsch)
16 - QUT Mineral Atlas
17 - Ruff.Info
18 - WWW-MINCRYST

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Burbankite

(Na,Ca)3(Sr,Ba,Ce)3(CO3)5
Dana No: 14.04.04.01 Strunz No: 05.AC.30
Locality:

Notes: