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Burbankite Mineral Data

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General Burbankite Information

Help on Chemical  Formula: Chemical Formula: (Na,Ca)3(Sr,Ba,Ce)3(CO3)5
Help on Composition: 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
Help on Empirical Formula: Empirical Formula: Na2.2Ca0.8Sr1.8Ba0.9Ce0.3(CO3)5
Help on Environment: Environment: Accessory mineral in carbonatites.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1955
Help on Locality: 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.
Help on Name Origin: Name Origin: Named for Wilbur Sweet Burbank (1898-1975), geologist of the U.S. Geological Survey.
Help on Name Pronunciation: Name Pronunciation: Burbankite + Pronunciation Say BURBANKITE
Help on Synonym: Synonym: ICSD 30949
  PDF 26-1374

Burbankite Image

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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

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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

Help on Axial Ratios: Axial Ratios: a:c = 1:0.61443
Help on Cell Dimensions: Cell Dimensions: a = 10.53, c = 6.47, Z = 2; V = 621.29 Den(Calc)= 3.77
Help on Crystal System: Crystal System: Hexagonal - Dihexagonal Dipyramidal H-M Symbol (6/m 2/m 2/m) Space Group: P 63/mmc
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.639(1), 3.041(0.8), 5.28(0.7),

Physical Properties of Burbankite

Help on Cleavage: Cleavage: {100} Distinct
Help on Color: Color: Colorless, Grayish yellow, Orange, Pink.
Help on Density: Density: 3.5
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Hardness: Hardness: 3.5 - Copper Penny
Help on Luminescence: Luminescence: Fluorescent, Short UV=pink.
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Burbankite

Help on Dichroism (e): Dichroism (e): colorless.
Help on Dichroism (w): Dichroism (w): colorless.
Help on Gladstone-Dale: 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
Help on Optical Data: Optical Data: Uniaxial (?), a=1.615, b=1.627, bire=0.0120.

Calculated Properties of Burbankite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.49 gm/cc
note: Specific Gravity of Burbankite =3.77 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.04
Boson Index = 0.96
Help on Photoelectric: Photoelectric: PEBurbankite = 131.97 barns/electron
U=PEBurbankite x relectron= 460.00 barns/cc.
Help on Radioactivity: 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
Curies (Ci)
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

Help on  Dana Class: Dana Class: (14)Anhydrous Carbonates
  (14.04)with Compound Formula A+2 B++2 (CO3)4
  (14.04.04)Burbankite Group (Hexagonal) Burbankite (Na,Ca)3(Sr,Ba,Ce)3(CO3)5 P 63/mmc 6/m 2/m 2/m Khanneshite (NaCa)3(Ba,Sr,Ce,Ca)3(CO3)5 P 63mc 6mm Calcioburbankite Na3(Ca,REE,Sr)3(CO3)5 P 63mc 6mm 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 Burbankite Information

Help on References: References: NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990;www.saint-hilaire.ca) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: 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 - GeoScienceWorld
9 - Google Images
10 - Google Scholar
11 - Handbook of Mineralogy (MinSocAm)
12 - Handbook of Mineralogy (UofA)
13 - MinDAT
14 - Mineralienatlas (Deutsch)
15 - Online Mineral Museum
16 - QUT Mineral Atlas
17 - Ruff.Info

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Dana No: Strunz No: 05.AC.30





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