Bismutopyrochlore Mineral Data

Bismutopyrochlore Mineral Data

[Mineral Auctions] [Register] [Current Auctions] [Log In] [www.danweinrich.com]
Dan Weinrich Auctions
Specializing In Live Weekly Auctions Of Top Quality Mineral Specimens
The Place To Find Great Specimens At Great Prices!

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:

Bi_0.4U_0.3Ca_0.3Pb_0.1Nb_1.5Ta_0.25O₆(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:

Image not yet available on Webmineral.com

Try searching images.google.com or Mindat Picture Gallary for mineral pictures. Caution: The images retrieved may not be appropriate.

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

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 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:

r_electron=4.50 gm/cc
note: r_{Bismutopyrochlore}=4.97 gm/cc.

Fermion Index

Fermion Index = 0.00924
Boson Index = 0.99076

Photoelectric:

PE_{Bismutopyrochlore}= 774.89 barns/electron
U=PE_{Bismutopyrochlore} x r_electron=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
Dan Weinrich Fine Minerals
Dan Weinrich Auctions
e-Rocks Auctions
Excalibur Minerals
Exceptional Minerals
Fabre Minerals
Greenside Minerals
John Betts Fine Minerals
Masons Minerals
Minernet.it
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: