General Bismutopyrochlore Information
|
Chemical Formula: |
(Bi,U,Ca,Pb)1+x(Nb,Ta)2O6(OH)·n(H2O) |
Composition: |
Molecular Weight = 562.81 gm |
| |
Calcium 2.14 % Ca 2.99 % CaO |
| |
Uranium 12.69 % U 15.25 % UO3 |
| |
Tantalum 8.04 % Ta 9.81 % Ta2O5 |
| |
Niobium 24.76 % Nb 35.42 % Nb2O5 |
| |
Bismuth 14.85 % Bi 16.56 % Bi2O3 |
| |
Hydrogen 1.72 % H 15.36 % H2O |
| |
Lead 3.68 % Pb 3.97 % PbO |
| |
Oxygen 32.12 % O |
| |
______ ______ |
| |
100.00 % 99.36 % = TOTAL OXIDE |
Empirical Formula: |
Bi0.4U0.3Ca0.3Pb0.1Nb1.5Ta0.25O6(OH)·4.3(H2O) |
Environment: |
Formed on lepidolite in miarolitic cavities in a pegmatite vein. A member of the pyrochlore group |
IMA Status: |
Approved IMA 1998 (Dana # Added) |
Locality: |
Mika pegmatite vein, central Rangkul' Highlands, Eastern Pamirs, Tajikistan. Link to MinDat.org Location Data. |
Name Origin: |
Named for its composition and relationship to pyrochlore. |
Synonym: |
IMA1998-059 |
| |
Search for Bismutopyrochlore Images |
Images:
|
|
| | |
Bismutopyrochlore Crystallography
|
Cell Dimensions: |
a = 10.41, Z = 6; V = 1,128.11 Den(Calc)= 4.97 |
Crystal System: |
Isometric - HexoctahedralH-M Symbol (4/m 3 2/m) Space Group: F d3m |
X Ray Diffraction: |
By Intensity(I/Io): 2.967(1)(111), 1.569(0.9)(262), 1.848(0.9)(044),1.195(0.8)(662), 2.614(0.7)(224), 1.145(0.5)(735), 1.5(0.4)(444), 5.98(0.4)(111), |
Forms:
Mouse
Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize
Keyboard
S - Stereo
I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu
Help on Above
|
|
|
Forms:
[ 1 1 1]
[ 2 1 1]
[ 1 1 0]
Warning: this large pop-up is very compute intensive and
may not work well with some computers.
|
|
| |
Physical Properties of Bismutopyrochlore
|
Cleavage: |
None |
Color: |
Black, Dark greenish brown. |
Density: |
4.97 |
Diaphaniety: |
Translucent |
Fracture: |
Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments. |
Habit: |
Amorphous - No crystalline form or imitative shape. |
Habit: |
Metamict - Mineral originally crystalline, now amorphous due to radiation damage. |
Hardness: |
5 - Apatite |
Luster: |
Adamantine |
Streak: |
yellow |
| |
Optical Properties of Bismutopyrochlore
|
Gladstone-Dale: |
CI meas= -0.021 (Excellent) - where the CI = (1-KPDmeas/KC) CI calc= -0.021 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2213,KPDmeas= 0.2213,KC= 0.2169 |
Optical Data: |
Isotropic, n=2.1. |
| |
Calculated Properties of Bismutopyrochlore
|
Electron Density: |
relectron=4.50 gm/cc note: rBismutopyrochlore =4.97 gm/cc. |
Fermion Index |
Fermion Index = 0.00924 Boson Index = 0.99076 |
Photoelectric: |
PEBismutopyrochlore = 774.89 barns/electron U=PEBismutopyrochlore x relectron=3,486.40 barns/cc. |
Radioactivity: |
GRapi = 979,048.96 (Gamma Ray American Petroleum Institute Units)
Bismutopyrochlore is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram.
Estimated Maximum U.S. Postal Shipping Size
(10 mRem/hr limit, Unshielded 10 cm box)
31.07 ± 7.77 grams of pure Bismutopyrochlore .
Estimated Maximum U.S. Postal Shipping Size
(10 mRem/hr limit, Unshielded 100 cm box)
3106.8 ±776.69 grams of pure Bismutopyrochlore .
Estimated Radioactivity from Bismutopyrochlore - strong
Specimen Size Weight/Volume (Sphere) * |
Calculated Activity Bequerols (Bq) |
Calculated Activity Curies (Ci) |
Estimated Activity GR(api) |
Estimated Exposure (mRem**)/hr If Held in Hand For One Hour |
| 1000 gm / 7.27 cm |
22,711,287 |
6.14E-04 |
979,048.96 |
321.88 |
| 100 gm / 3.37 cm |
2,271,129 |
6.14E-05 |
97,904.90 |
32.19 |
| 10 gm / 1.57 cm |
227,113 |
6.14E-06 |
9,790.49 |
3.22 |
| 1 gm / 7.27 mm |
22,711 |
6.14E-07 |
979.05 |
0.32 |
| 0.1 gm / 3.37 mm |
2,271 |
6.14E-08 |
97.90 |
0.03 |
| 0.01 gm / 1.57 mm |
227 |
6.14E-09 |
9.79 |
0.00 |
| 0.001 gm / 0.73 mm |
23 |
6.14E-10 |
0.98 |
0.00 |
Weight of pure Bismutopyrochlore in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.97 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
|
| |
Bismutopyrochlore Classification
|
Dana Class: |
8.2.1.9 (8)Multiple Oxides with Nb, Ta, and Ti |
| |
(8.2)where (A)2 (B2O6) (O,OH,F) |
| |
(8.2.1)Pyrochlore Group (Pyrochlore Subgroup; Nb>Ta;(Nb+Ta)>2(Ti) |
| |
8.2.1.1 Pyrochlore (Na,Ca)2Nb2O6(OH,F) F d3m 4/m 3 2/m |
| |
8.2.1.2 Kalipyrochlore (H2O,Sr)(Nb,Ti)(O,OH)6·(H2O,K) F d3m 4/m 3 2/m |
| |
8.2.1.3 Bariopyrochlore (Ba,Sr)(Nb,Ti)2(O,OH)7 F d3m 4/m 3 2/m |
| |
8.2.1.4 Yttropyrochlore-(Y) (Y,Na,Ca,U)1-2(Nb,Ta,Ti)2(O,OH)7 F d3m 2/m 3 |
| |
8.2.1.5 Ceriopyrochlore-(Ce) (Ce,Ca,Y)2(Nb,Ta)2O6(OH,F) F d3m 4/m 3 2/m |
| |
8.2.1.6 Plumbopyrochlore (Pb,Y,U,Ca)2-xNb2O6(OH) F d3m 4/m 3 2/m |
| |
8.2.1.7 Uranpyrochlore (U,Ca,Ce)2(Nb,Ta)2O6(OH,F) F d3m 4/m 3 2/m |
| |
8.2.1.8 Strontiopyrochlore* Sr2Nb2(O,OH)7 F d3m 4/m 3 2/m |
| |
8.2.1.9 Bismutopyrochlore ! (Bi,U,Ca,Pb)1x(Nb,Ta)2O6(OH)·n(H2O) F d3m 4/m 3 2/m |
Strunz Class: |
IV/C.17-85 IV - Oxides |
| |
IV/C - Oxides with metal : oxygen = 2:3 (M2O3 and related compounds) |
| |
IV/C.17 - Pyrochlore group, Pyrochlore series with Nb > Ti |
| |
IV/C.17-10 Pyrochlore (Na,Ca)2Nb2O6(OH,F) F d3m 4/m 3 2/m |
| |
IV/C.17-20 Calciobetafite Ca2(Ti,Nb)2(O,OH)7 F d3m 4/m 3 2/m |
| |
IV/C.17-30 Kalipyrochlore (H2O,Sr)(Nb,Ti)(O,OH)6·(H2O,K) F d3m 4/m 3 2/m |
| |
IV/C.17-40 Strontiopyrochlore* Sr2Nb2(O,OH)7 F d3m 4/m 3 2/m |
| |
IV/C.17-50 Bariopyrochlore (Ba,Sr)(Nb,Ti)2(O,OH)7 F d3m 4/m 3 2/m |
| |
IV/C.17-60 Yttropyrochlore-(Y) (Y,Na,Ca,U)1-2(Nb,Ta,Ti)2(O,OH)7 F d3m 2/m 3 |
| |
IV/C.17-70 Ceriopyrochlore-(Ce) (Ce,Ca,Y)2(Nb,Ta)2O6(OH,F) F d3m 4/m 3 2/m |
| |
IV/C.17-80 Plumbopyrochlore (Pb,Y,U,Ca)2-xNb2O6(OH) F d3m 4/m 3 2/m |
| |
IV/C.17-85 Bismutopyrochlore (Bi,U,Ca,Pb)1x(Nb,Ta)2O6(OH)·n(H2O) F d3m 4/m 3 2/m |
| |
IV/C.17-90 Uranpyrochlore (U,Ca,Ce)2(Nb,Ta)2O6(OH,F) F d3m 4/m 3 2/m |
| |
Other Bismutopyrochlore Information
|
References: |
NAME( AmMin, vol 85, p 1561) PHYS. PROP.(AmMin, vol 85, p 1561) OPTIC PROP.(AmMin, vol 85, p 1561) |
See Also: |
Links to other databases for Bismutopyrochlore :
1 -Am. Min. Crystal Structure Database
2 -Athena
3 -Google Images
4 -Google Scholar
5 -MinDAT
6 -MinMax(Deutsch)
7 -MinMax(English)
8 -Mineralienatlas (Deutsch)
9 -QUT Mineral Atlas
10 - Uranium Minerals
Search for Bismutopyrochlore using:
[ALTAVISTA]
[AOL]
[About.com]
[All-The-Web]
[HotBot]
[Ixquick]
[LookSmart]
[MAMMA]
[MSN.COM]
[Netscape]
[Teoma]
[Wikipedia]
[YAHOO]
Visit our Advertisers for Bismutopyrochlore :
AA Mineral Specimens
B and L Minerals
Crystal Vaults
Dan Weinrich Fine Minerals
Dan Weinrich Auctions
e-Rocks Auctions
Excalibur Minerals
Exceptional Minerals
Fabre Minerals
Greenside Minerals
John Betts Fine Minerals
Masons Minerals
Mineral News
Mineral of the Month Club
MineralsWeb Fine Minerals
Rockshop.cz Kalat Fine Minerals
T G Fine Minerals
Wrights Rock Shop
Translate Bismutopyrochlore Mineral Data :
Ask about Bismutopyrochlore here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in
Español
Print or Cut-and-Paste your Bismutopyrochlore Specimen Label here :
|
Bismutopyrochlore
(Bi,U,Ca,Pb)1+x(Nb,Ta)2O6(OH)·n(H2O)
Dana No: 8.2.1.9 Strunz No: IV/C.17-85
Locality:
Notes:
|
|
| |
| |
|
| |