Mineralogy Database

Moctezumite Mineral Data

Search Webmineral :
  
Advertisment

General Moctezumite Information

Help on Chemical  Formula: Chemical Formula: Pb(UO2)(TeO3)2
Help on Composition: Composition: Molecular Weight = 828.42 gm
   Uranium    28.73 %  U    32.60 % UO2
   Tellurium  30.81 %  Te   38.53 % TeO2
   Lead       25.01 %  Pb   26.94 % PbO
   Oxygen     15.45 %  O
             ______        ______ 
             100.00 %       98.07 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Pb(UO2)(TeO3)2
Help on Environment: Environment: Secondary mineral in telluride-bearing ores.
Help on IMA Status: IMA Status: Approved IMA 1965
Help on Locality: Locality: Moctezuma mine (La Bambolla), Moctezuma, Sonora, Mexico. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality which was named after Moctezuma (1466-1520), last king of the Aztecs.
Help on Name Pronunciation: Name Pronunciation: Moctezumite + Pronunciation Say MOCTEZUMITE
Help on Synonym: Synonym: ICSD 73442
  PDF 18-707
 

Moctezumite Image

Click Here for Larger   Image in a New Browser Window Images:
Click Here for Larger   Image

  Moctezumite

Comments: Orange crystals of moctezumite on matrix.
Location: Moctezuma, Mun. de Moctezuma, Sonora, Mexico. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag

Click Here for Larger   Image in a New Browser Window Images:
Click Here for Larger   Image

  Burckhardtite   Moctezumite

Comments: Pink crusts of burckhardtite with yellow crystalline moctezumite on quartz.
Location: Moctezuma Mine, Moctezuma, Sonora, Mexico. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Moctezumite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.1065:1:1.9508
Help on Cell Dimensions: Cell Dimensions: a = 7.813, b = 7.061, c = 13.775, Z = 4; beta = 93.71° V = 758.34 Den(Calc)= 7.26
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.156(1), 3.492(0.9), 2.997(0.8),
 

Physical Properties of Moctezumite

Help on Cleavage: Cleavage: {100} Perfect
Help on Color: Color: Orange, Dark orange, Brownish orange.
Help on Density: Density: 5.73
Help on Hardness: Hardness: 3 - Calcite
 

Optical Properties of Moctezumite

Help on Optical Data: Optical Data: NCalc= 2.06 - from Gladstone-Dale relationship (KC = 0.1459) where Ncalc=Dcalc*KC+1
NCalc= 1.84 - from Gladstone-Dale relationship (KC = 0.1459) where Ncalc=Dmeas*KC+1
 

Calculated Properties of Moctezumite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.99 gm/cc
note: Specific Gravity of Moctezumite =7.26 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.08
Boson Index = 0.92
Help on Photoelectric: Photoelectric: PEMoctezumite =1,369.00 barns/electron
U=PEMoctezumite x relectron=8,206.21 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 2,022,153.29 (Gamma Ray American Petroleum Institute Units)
Concentration of Moctezumite per GRapi unit = 494.52 (PPB)

Moctezumite 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) 15.04 ± 3.76 grams of pure Moctezumite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 1504.2 ±376.04 grams of pure Moctezumite .

Estimated Radioactivity from Moctezumite - very 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 / 6.41 cm 51,431,595 1.39E-03 2,022,153.29 664.82
100 gm / 2.97 cm 5,143,160 1.39E-04 202,215.33 66.48
10 gm / 1.38 cm 514,316 1.39E-05 20,221.53 6.65
1 gm / 6.41 mm 51,432 1.39E-06 2,022.15 0.66
0.1 gm / 2.97 mm 5,143 1.39E-07 202.22 0.07
0.01 gm / 1.38 mm 514 1.39E-08 20.22 0.01
0.001 gm / 0.64 mm 51 1.39E-09 2.02 0.00

Weight of pure Moctezumite in grams (gm) and Calculated Diameter of a Sphere with a Density of 7.26 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
 

Moctezumite Classification

Help on  Dana Class: Dana Class: 34.01.05.01 (34)Selenites - Tellurites - Sulfites
  (34.01)as A++ XO3
  (34.01.05)Dana Group
 
34.01.05.01 Moctezumite Pb(UO2)(TeO3)2 P 21/c 2/m
Help on  Strunz Class: Strunz Class: 04.JK.65 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.J - Arsenites, Antimonites, Bismuthites, Sulfites,
  04.JK -Tellurites without additional anions, without H2O
 
04.JK.65 Moctezumite Pb(UO2)(TeO3)2 P 21/c 2/m
 

Other Moctezumite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Moctezumite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info
16 - Uranium Minerals
17 - WWW-MINCRYST

Search for Moctezumite using:

Google
 
Web webmineral.com
[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Moctezumite :

Ask about Moctezumite 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 Espaņol

Print or Cut-and-Paste your Moctezumite Specimen Label here :

Moctezumite

Pb(UO2)(TeO3)2
Dana No: 34.01.05.01 Strunz No: 04.JK.65
Locality:

 

Notes:

 

 
   
 


Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.