General Changbaiite Information Chemical Formula: |
PbNb2O6 |
Composition: |
Molecular Weight = 489.01 gm |
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Niobium 38.00 % Nb 54.36 % Nb2O5 |
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Lead 42.37 % Pb 45.64 % PbO |
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Oxygen 19.63 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
Empirical Formula: |
PbNb2O6 |
Environment: |
In kaolin veinlest and kaolin-filled cavities. |
IMA Status: |
Approved IMA 1978 |
Locality: |
Chanbai Mountains, Tonghua, Jilin, China. Link to MinDat.org Location Data. |
Name Origin: |
Named for the locality. |
Synonym: |
ICSD 24855 |
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PDF 29-780 |
| | Changbaiite Image
Images:
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Changbaiite Crystallography Axial Ratios: |
a:c = 1:1.10039 |
Cell Dimensions: |
a = 10.499, c = 11.553, Z = 9; V = 1,102.86 Den(Calc)= 6.63 |
Crystal System: |
Trigonal - Ditrigonal PyramidalH-M Symbol (3m) Space Group: R 3m |
X Ray Diffraction: |
By Intensity(I/Io): 3.1(1), 3.028(0.9), 1.76(0.6), |
| Physical Properties of Changbaiite Cleavage: |
{0001} Perfect, {1011} Distinct |
Color: |
Colorless, Cream white, Pale brown, Yellow brown, Pale yellow green. |
Density: |
6.48 |
Diaphaneity: |
Transparent |
Habit: |
Tabular - Form dimensions are thin in one direction. |
Hardness: |
5.5 - Knife Blade |
Luminescence: |
Non-fluorescent. |
Luster: |
Adamantine - Pearly |
Magnetism: |
Nonmagnetic |
Streak: |
white |
| Optical Properties of Changbaiite Gladstone-Dale: |
CI meas= -0.107 (Poor) - where the CI = (1-KPDmeas/KC) |
CI calc= -0.082 (Poor) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2233,KPDmeas= 0.2285,KC= 0.2064 Ncalc = 2.34 - 2.37 Optical Data: |
Uniaxial (+), w=2.476, e=2.485, bire=0.0090. |
| Calculated Properties of Changbaiite Electron Density: |
Bulk Density (Electron Density)=5.75 gm/cc |
note: Specific Gravity of Changbaiite =6.63 gm/cc. Fermion Index: |
Fermion Index = 0.09 |
Boson Index = 0.91 Photoelectric: |
PEChangbaiite = 812.11 barns/electron |
U=PEChangbaiite x rElectron Density=4,668.53 barns/cc. Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) |
Changbaiite is Not Radioactive | Changbaiite Classification Dana Class: |
08.03.11.01 (08)Multiple Oxides with Nb, Ta, and Ti |
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(08.03)where A (B2O6) |
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(08.03.11)Dana Group |
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Strunz Class: |
04.DF.10 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate |
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04.D - Metal:Oxygen = 1:2 and similar |
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04.DF -With large (± medium-sized) cations; dimers and trimers of edge-sharing octahedra |
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| Other Changbaiite Information References: |
NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) |
See Also: |
Links to other databases for Changbaiite : |
1 - Am. Min. Crystal Structure Database 2 - Athena 3 - EUROmin Project 4 - Ecole des Mines de Paris 5 - GeoScienceWorld 6 - Google Images 7 - Google Scholar 8 - Handbook of Mineralogy (MinSocAm) 9 - Handbook of Mineralogy (UofA) 10 - MinDAT 11 - Mineralienatlas (Deutsch) 12 - Online Mineral Museum 13 - QUT Mineral Atlas 14 - Ruff.Info Search for Changbaiite using: Visit our Advertisers for Changbaiite : A Bijoux Google Search for ChangbaiiteAdam's Minerals Google Search for Changbaiite Cape Minerals Google Search for Changbaiite Dakota Matrix Minerals Google Search for Changbaiite Excalibur Mineral Corp. Google Search for Changbaiite Exceptional Minerals Google Search for Changbaiite John Betts Fine Minerals Search for Changbaiite McDougall Minerals Google Search for Changbaiite Mineral News Website Link Rock and Mineral Shows Google Search for Changbaiite Weinrich Minerals, Inc. Google Search for Changbaiite Ask about Changbaiite here : Print or Cut-and-Paste your Changbaiite Specimen Label here :
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