[Miner's Monthly] [Activity Books] [Clip Art] [Mineral Bingo] [Note Cards] Fun & Educational Publications for Young Mineralogists General Chekhovichite Information(Bi,Pb,Fe)2Te4O11 |
Molecular Weight = 1,078.24 gm |
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Iron 1.55 % Fe 2.00 % FeO |
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Bismuth 23.26 % Bi 25.93 % Bi2O3 |
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Tellurium 47.34 % Te 59.21 % TeO2 |
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Lead 11.53 % Pb 12.42 % PbO |
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Oxygen 16.32 % O |
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100.00 % 99.55 % = TOTAL OXIDE |
Bi1.2Pb0.6Fe2+0.3Te4O11 |
A rare oxidation product of earlier tellurium-bearing minerals. |
Approved IMA 1987 |
Zod deposit, 14 km east of Vardenis, Armenia. Link to MinDat.org Location Data. |
Named for Sergei Konstatinovich Chekhovich (1917-1997), mineralogist and geologist, Polytechnical Institute of Alma-Ata, Kazakhstan. |
ICSD 72709 |
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PDF 42-1323 |
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Chekhovichite Crystallographya:b:c =2.3803:1:0.8692 |
a = 19, b = 7.982, c = 6.938, Z = 4; beta = 95.67° V = 1,047.06 Den(Calc)= 6.84 |
Monoclinic - SphenoidalH-M Symbol (2) Space Group: P 21 |
By Intensity(I/Io): 3.14(1), 3.29(1), 3.15(0.94), |
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Mouse
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| Physical Properties of Chekhovichite{hk0} Perfect, {hk0} Perfect |
Gray green, Gray white. |
6.88 |
Subtransparent |
Microscopic Crystals - Crystals visible only with microscopes. |
Subhedral Crystals - Occurs as crystals which tend to exhibit a recognizable crystal shape. |
Twinning Common - Crystals are usually twinned. |
4 - Fluorite |
Adamantine |
white |
| Optical Properties of ChekhovichiteCI meas= -0.245 (Poor) - where the CI = (1-KPDmeas/KC) |
CI calc= -0.253 (Poor) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2242,KPDmeas= 0.2229,KC= 0.179 Ncalc = 2.22 - 2.23 Biaxial (-), a=2.45, b=2.5, g=2.65, bire=0.2000, 2V(Calc)=64, 2V(Meas)=65. Dispersion r < v distinct. |
Marked. |
Observable. |
Pale gray to gray with white internal reflections. |
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| Calculated Properties of ChekhovichiteBulk Density (Electron Density)=5.78 gm/cc |
note: Specific Gravity of Chekhovichite =6.88 gm/cc. Fermion Index = 0.06 |
Boson Index = 0.94 PEChekhovichite = 830.21 barns/electron |
U=PEChekhovichite x rElectron Density=4,795.19 barns/cc. GRapi = 0 (Gamma Ray American Petroleum Institute Units) |
Chekhovichite is Not Radioactive | Chekhovichite Classification34.06.04.01 (34)Selenites - Tellurites - Sulfites |
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(34.06)Dana Type |
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(34.06.04)Dana Group |
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04.JK.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.JK -Tellurites without additional anions, without H2O |
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| Other Chekhovichite InformationNAME( AntBidBlaNic5) PHYS. PROP.(Am.Min.,Vol.74,p1400,1989) OPTIC PROP.(AmMin.,Vol.74,p1400,1989) |
Links to other databases for Chekhovichite : |
1 - Am. Min. Crystal Structure Database 2 - Athena 3 - EUROmin Project 4 - Ecole des Mines de Paris 5 - Google Images 6 - Google Scholar 7 - Handbook of Mineralogy (MinSocAm) 8 - Handbook of Mineralogy (UofA) 9 - MinDAT 10 - MinMax(Deutsch) 11 - MinMax(English) 12 - Mineralienatlas (Deutsch) 13 - QUT Mineral Atlas 14 - Ruff.Info Search for Chekhovichite using: Visit our Advertisers for Chekhovichite : AA Mineral SpecimensB & L Fine Minerals Crystalarium.com Dan Weinrich Fine Minerals Dan Weinrich Auctions Dakota Matrix Diamond Dan Publications e-Rocks Auctions Excalibur Minerals Exceptional Minerals Heliodor John Betts Fine Minerals Mason's Minerals Mineral News Mineral of the Month Club Wrights Rock Shop Translate Chekhovichite Mineral Data : Ask about Chekhovichite here : Print or Cut-and-Paste your Chekhovichite Specimen Label here :
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