Mineralogy Database

Burnsite Mineral Data

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General Burnsite Information

Help on Chemical  Formula: Chemical Formula: KCdCu7O2(SeO3)2Cl9
Help on Composition: Composition: Molecular Weight = 1,200.93 gm
   Potassium   3.52 %  K     4.24 % K2O
   Cadmium     9.08 %  Cd   10.37 % CdO
   Copper     36.93 %  Cu   41.58 % Cu2O
   Selenium   14.00 %  Se   19.68 % SeO2
   Chlorine   25.18 %  Cl   25.18 % Cl
                -   %   Cl   -5.68 % -O=Cl2   
   Oxygen     11.28 %  O
             ______        ______ 
             100.00 %       95.37 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: K1.08Cd0.97Cu6.98O2.08(SeO3)2.13Cl8.53
Help on Environment: Environment: Fumarole deposits. Similarity to ilinskite; structure
Help on IMA Status: IMA Status: Approved IMA 2002 (Dana # Added)
Help on Locality: Locality: North Breach of the great fissure eruption, Tolbachik volcano, Kamchatka, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Peter C. Burns (1966-), Canadian-born mineralogist and crystallographer.
Help on Synonym: Synonym: IMA2000-050

Burnsite Image

Click Here for Larger   Image in a New Browser Window Images:
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  Burnsite   Cotunnite

Comments: Images of burnsite grains (dark) in intimate intergrowth with cotunnite (light). Images obtained by scanning electron microscopy.
Location: North Breach of the great fissure Tolbachik volcano eruption (1975-1976), Kamchatka Peninsula, Russia. Scale: Scale bar: 20 µ-m.
© Canadian Mineralogist

Burnsite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:1.76766
Help on Cell Dimensions: Cell Dimensions: a = 8.7805, c = 15.521, Z = 2; V = 1,036.31 Den(Calc)= 3.85
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): 7.779(1)(002), 3.814(0.8)(200), 4.391(0.8)(110),3.066(0.7)(203), 2.501(0.6)(213), 2.19(0.5)(220), 2.582(0.5)(006), 6.823(0.5)(101), 1.919(0.4)(216),

Physical Properties of Burnsite

Help on Cleavage: Cleavage: {001} Good
Help on Color: Color: Dark red.
Help on Diaphaneity: Diaphaneity: Opaque to translucent
Help on Fracture: Fracture: Brittle - Uneven - Very brittle fracture producing uneven fragments.
Help on Habit: Habit: Anhedral Grains - Granular minerals without the expression of crystal shapes
Help on Habit: Habit: Microscopic Crystals - Crystals visible only with microscopes.
Help on Hardness: Hardness: 1-1.5 - Talc or a little harder
Help on Luster: Luster: Vitreous - Metallic
Help on Streak: Streak: red

Optical Properties of Burnsite

Help on Gladstone-Dale: Gladstone-Dale: CI calc= -0.004 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2379,KC= 0.237
Ncalc = 1.91
Help on Optical Data: Optical Data: Uniaxial (-), e=1.912, w=1.92, bire=0.0080.
Help on RL Bireflectance: RL Bireflectance: Weak.

Calculated Properties of Burnsite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.56 gm/cc
note: Specific Gravity of Burnsite =3.85 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PEBurnsite = 53.29 barns/electron
U=PEBurnsite x relectron= 189.51 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 46.85 (Gamma Ray American Petroleum Institute Units)
Concentration of Burnsite per GRapi unit = 2.13 (%)

Estimated Radioactivity from Burnsite - barely detectable


Burnsite Classification

Help on  Dana Class: Dana Class: (33)Selenates and Tellurates
  (33.03)with other anion groups
  (33.03.06)Dana Group Burnsite! KCdCu7O2(SeO3)2Cl9 P 63/mmc 6/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 04.JG.35 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.J - Arsenites, Antimonites, Bismuthites, Sulfites,
  04.JG -Selenites with additional anions, without H2O
04.JG.35 Burnsite! KCdCu7O2(SeO3)2Cl9 P 63/mmc 6/m 2/m 2/m

Other Burnsite Information

Help on References: References: NAME( AmMin, 88:1175) PHYS. PROP.(AmMin, 88:1175) OPTIC PROP.(AmMin, 88:1175)
Help on See Also: See Also: Links to other databases for Burnsite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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Dana No: Strunz No: 04.JG.35





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