Mineralogy Database

Umbozerite Mineral Data

Search Webmineral :
  
Advertisment

General Umbozerite Information

Help on Chemical  Formula: Chemical Formula: Na3Sr4ThSi8(O,OH)24
Help on Composition: Composition: Molecular Weight = 1,262.17 gm
   Sodium      5.46 %  Na    7.37 % Na2O
   Strontium  27.77 %  Sr   32.84 % SrO
   Thorium    18.38 %  Th   20.92 % ThO2
   Silicon    17.80 %  Si   38.08 % SiO2
   Hydrogen    0.16 %  H     1.43 % H2O
   Oxygen     30.42 %  O
             ______        ______ 
             100.00 %      100.63 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na3Sr4ThSi8O22(OH)2
Help on Environment: Environment: In ussingite veinlets cutting alkalic rocks.
Help on IMA Status: IMA Status: Approved IMA 1974
Help on Locality: Locality: Umbozero (Lake Umba), Kola Peninsula, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Umbozerite + Pronunciation Say UMBOZERITE
 

Umbozerite Image

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

  Umbozerite

Comments: Dark brown prismatic umbozerite masses in pegmatite rock.
Location: Pegmatite #100, Mount Karnasurt,  Lovozero Massif, Kola Peninsula, Murmansk District,. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Umbozerite Crystallography

Help on Crystal System: Crystal System: Amorphous- No Crystals
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.29(1), 1.701(0.8), 3.38(0.6),
 

Physical Properties of Umbozerite

Help on Cleavage: Cleavage: None
Help on Color: Color: Bottle green, Greenish brown.
Help on Density: Density: 3.6
Help on Fracture: Fracture: Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).
Help on Habit: Habit: Metamict - Mineral originally crystalline, now amorphous due to radiation damage.
Help on Habit: Habit: Pseudo Tetragonal - Crystals show a tetragonal shape.
Help on Hardness: Hardness: 5 - Apatite
Help on Luster: Luster: Vitreous (Glassy)
 

Optical Properties of Umbozerite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.016 (Superior) - where the CI = (1-KPDmeas/KC)
KPDmeas= 0.1778,KC= 0.1806
Ncalc = 1.65
Help on Optical Data: Optical Data: Isotropic, n=1.64.
 

Calculated Properties of Umbozerite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.31 gm/cc
note: Specific Gravity of Umbozerite =3.60 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PEUmbozerite = 452.73 barns/electron
U=PEUmbozerite x relectron=1,500.48 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 361,065.87 (Gamma Ray American Petroleum Institute Units)
Concentration of Umbozerite per GRapi unit = 2.77 (PPM)

Umbozerite 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) 84.24 ± 21.06 grams of pure Umbozerite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 8424.1 ±2106.0 grams of pure Umbozerite .

Estimated Radioactivity from Umbozerite - 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 / 8.10 cm 8,236,040 2.23E-04 361,065.87 118.71
100 gm / 3.76 cm 823,604 2.23E-05 36,106.59 11.87
10 gm / 1.74 cm 82,360 2.23E-06 3,610.66 1.19
1 gm / 8.10 mm 8,236 2.23E-07 361.07 0.12
0.1 gm / 3.76 mm 824 2.23E-08 36.11 0.01
0.01 gm / 1.74 mm 82 2.23E-09 3.61 0.00
0.001 gm / 0.81 mm 8 2.23E-10 0.36 0.00

Weight of pure Umbozerite in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.60 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
 

Umbozerite Classification

Help on  Dana Class: Dana Class: 78.07.17.01 (78)Unclassified silicates
  (78.07)wholly unclassified silicates
  (78.07.17)Dana Group
 
78.07.17.01 Umbozerite Na3Sr4ThSi8(O,OH)24 None
Help on  Strunz Class: Strunz Class: 09.HG.15 09 - SILICATES (Germanates)
  09.H - Unclassified Silicates
  09.HG -With REE, Th
 
09.HG.15 Umbozerite Na3Sr4ThSi8(O,OH)24 None
 

Other Umbozerite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Umbozerite :
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
15 - Uranium Minerals

Search for Umbozerite using:

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

Visit our Advertisers for Umbozerite :

Ask about Umbozerite 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 Umbozerite Specimen Label here :

Umbozerite

Na3Sr4ThSi8(O,OH)24
Dana No: 78.07.17.01 Strunz No: 09.HG.15
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.