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Burnsite Mineral Data
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General Burnsite Information
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 Chemical Formula: |
KCdCu7O2(SeO3)2Cl9 |
| Composition: |
Molecular Weight = 1,200.93 gm |
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Potassium 3.52 % K 4.24 % K2O |
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Cadmium 9.08 % Cd 10.37 % CdO |
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Copper 36.93 % Cu 41.58 % Cu2O |
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Selenium 14.00 % Se 19.68 % SeO2 |
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Chlorine 25.18 % Cl 25.18 % Cl |
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- %
Cl -5.68 % -O=Cl2 |
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Oxygen 11.28 % O |
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______ ______ |
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100.00 % 95.37 % = TOTAL OXIDE |
| Empirical Formula: |
K1.08Cd0.97Cu6.98O2.08(SeO3)2.13Cl8.53 |
| Environment: |
Fumarole deposits. Similarity to ilinskite; structure |
| IMA Status: |
Approved IMA 2002 (Dana # Added) |
| Locality: |
North Breach of the great fissure eruption, Tolbachik volcano, Kamchatka, Russia. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Peter C. Burns (1966-), Canadian-born mineralogist and crystallographer. |
| Synonym: |
IMA2000-050 |
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Burnsite Image |
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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 |
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Burnsite Crystallography
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| Axial Ratios: |
a:c = 1:1.76766 |
| Cell Dimensions: |
a = 8.7805, c = 15.521, Z = 2; V = 1,036.31 Den(Calc)= 3.85 |
| Crystal System: |
Hexagonal - Dihexagonal Dipyramidal H-M Symbol (6/m 2/m 2/m) Space Group: P 63/mmc |
| 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), |
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Physical Properties of Burnsite
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| Cleavage: |
{001} Good |
| Color: |
Dark red. |
| Diaphaneity: |
Opaque to translucent |
| Fracture: |
Brittle - Uneven - Very brittle fracture producing uneven fragments. |
| Habit: |
Anhedral Grains - Granular minerals without the expression of crystal shapes |
| Habit: |
Microscopic Crystals - Crystals visible only with microscopes. |
| Hardness: |
1-1.5 - Talc or a little harder |
| Luster: |
Vitreous - Metallic |
| Streak: |
red |
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Optical Properties of Burnsite
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| Gladstone-Dale: |
CI calc= -0.004 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2379,KC= 0.237
Ncalc = 1.91 |
| Optical Data: |
Uniaxial (-), e=1.912, w=1.92, bire=0.0080. |
| RL Bireflectance: |
Weak. |
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Calculated Properties of Burnsite
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| Electron Density: |
Bulk Density (Electron Density)=3.56 gm/cc
note: Specific Gravity of Burnsite =3.85 gm/cc.
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| Fermion Index: |
Fermion Index = 0.03
Boson Index = 0.97 |
| Photoelectric: |
PEBurnsite = 53.29 barns/electron
U=PEBurnsite x relectron= 189.51 barns/cc.
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| Radioactivity: |
GRapi = 46.85 (Gamma Ray American Petroleum Institute Units)
Concentration of Burnsite per GRapi unit = 2.13 (%)
Estimated Radioactivity from Burnsite  - barely detectable
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Burnsite Classification
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| Dana Class: |
33.03.06.01 (33)Selenates and Tellurates |
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(33.03)with other anion groups |
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(33.03.06)Dana Group |
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33.03.06.01 Burnsite! KCdCu7O2(SeO3)2Cl9 P 63/mmc 6/m 2/m 2/m |
| Strunz Class: |
04.JG.35 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate |
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04.J - Arsenites, Antimonites, Bismuthites, Sulfites, |
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04.JG -Selenites with additional anions, without H2O |
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04.JG.35 Burnsite! KCdCu7O2(SeO3)2Cl9 P 63/mmc 6/m 2/m 2/m |
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Other Burnsite Information
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| References: |
NAME( AmMin, 88:1175) PHYS. PROP.(AmMin, 88:1175) OPTIC PROP.(AmMin, 88:1175) |
| 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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Print or Cut-and-Paste your Burnsite Specimen Label here :
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Burnsite
KCdCu7O2(SeO3)2Cl9
Dana No: 33.03.06.01 Strunz No: 04.JG.35
Locality:
Notes:
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