Bergenite Mineral Data

Bergenite Mineral Data
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General Bergenite Information

Help on Chemical Formula: Chemical Formula: Ca2Ba4[(UO3)2O2(PO4)2]3 (H2O)16
Help on Composition: Composition: Molecular Weight = 3,299.70 gm
   Barium      16.65 %  Ba   18.59 % BaO
   Calcium      2.43 %  Ca    3.40 % CaO
   Uranium     43.28 %  U    52.01 % UO3
   Phosphorus   5.63 %  P    12.91 % P2O5
   Hydrogen     0.98 %  H     8.74 % H2O
   Oxygen      31.03 %  O
              ______        ______ 
              100.00 %       95.64 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca2Ba43(UO3)23(O2)3(PO4)2(H2O)16
Help on Environment: Environment: Secondary uranium phosphate mineral.
Help on IMA Status: IMA Status: Approved IMA 1959
Help on Locality: Locality: Mine dump at Streuberg, Bergen, Saxony, Germany. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Bergenite + Pronunciation Say BERGENITE
 

Bergenite Image

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Bergenite

Comments: Yellow bladed bergenite crystals.
Location: Mechelserrun, Saxony, Germany. Scale: Size Not Given.
© Lou Perloff / Photo Atlas of Minerals
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Bergenite

Comments: Bladed, radial aggregates of yellow bergenite crystals on matrix.
Location: Bergen, Falkenstein, Vogtland, Saxony, Germany. Scale: Picture size 2.5 mm.
© Paul M. Schumacher

Bergenite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.5852:1:1.0063
Help on Cell Dimensions: Cell Dimensions: a = 10.092, b = 17.245, c = 17.355, Z = 2; beta = 113.678° V = 2,766.14 Den(Calc)= 3.96
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 7.73(1), 3.837(0.8), 3.054(0.6),
Click Here for Large Bergenite Structure Window Crystal Structure:

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drag2 - RMB Resize/Rotate
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Locock A J , Burns P C , The Canadian Mineralogist , 41 (2003) p.91-101, The crystal structure of bergenite, a new geometrical isomer of the, phosphuranylite group

 

Physical Properties of Bergenite

Help on Cleavage: Cleavage: {???} Perfect
Help on Color: Color: Yellow, Greenish yellow.
Help on Density: Density: 4.1
Help on Diaphaneity: Diaphaneity: Semitransparent
Help on Habit: Habit: Acicular - Occurs as needle-like crystals.
Help on Habit: Habit: Tabular - Form dimensions are thin in one direction.
Help on Hardness: Hardness: 2-3 - Gypsum-Calcite
Help on Luminescence: Luminescence: Fluorescent, Short UV=pale orange brown green, Long UV=pale orange brown green.
Help on Streak: Streak: yellow white
 

Optical Properties of Bergenite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.165 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.206 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1757,KPDmeas= 0.1697,KC= 0.1456
Ncalc = 1.58 - 1.6
Help on Optical Data: Optical Data: Biaxial (-), a=1.66, b=1.7-1.71, g=1.722, bire=0.0620
Help on Pleochroism (x): Pleochroism (x): colorless.
Help on Pleochroism (y): Pleochroism (y): colorless.
Help on Pleochroism (z): Pleochroism (z): colorless.
 

Calculated Properties of Bergenite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.60 gm/cc
note: Specific Gravity of Bergenite =4.10 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PEBergenite =1,193.91 barns/electron
U=PEBergenite x relectron=4,302.08 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 3,242,387.44 (Gamma Ray American Petroleum Institute Units)
Concentration of Bergenite per GRapi unit = 308.41 (PPB)

Bergenite 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) 9.38 ± 2.35 grams of pure Bergenite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 938.09 ±234.52 grams of pure Bergenite .

Estimated Radioactivity from Bergenite - very strong
Specimen
Size
Weight/Volume
(Sphere) *		 Calculated
Activity
Becquerels
(Bq)		 Calculated
Activity
Curies (Ci)		 Estimated
Activity
GR(api)		 Estimated
Exposure
(mRem**)/hr
If Held in Hand
For One Hour
1000 gm / 7.75 cm 77,474,733 2.09E-03 3,242,387.44 1,065.99
100 gm / 3.60 cm 7,747,473 2.09E-04 324,238.74 106.60
10 gm / 1.67 cm 774,747 2.09E-05 32,423.87 10.66
1 gm / 7.75 mm 77,475 2.09E-06 3,242.39 1.07
0.1 gm / 3.60 mm 7,747 2.09E-07 324.24 0.11
0.01 gm / 1.67 mm 775 2.09E-08 32.42 0.01
0.001 gm / 0.78 mm 77 2.09E-09 3.24 0.00

Weight of pure Bergenite in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.10 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
 

Bergenite Classification
Help on Dana Class: Dana Class: 42.04.05.03 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
  (42.04)where (AB)5 (XO4)2 Zq · x(H2O)
  (42.04.05)Dumontite Group
 
42.04.05.01 Dumontite Pb2(UO2)3O2(PO4)2•5(H2O) P 21/m 2/m
 
42.04.05.02 Hugelite Pb2(UO2)3(AsO4)2(OH)4•3(H2O) P 21/m 2/m
 
42.04.05.03 Bergenite Ca2Ba4[(UO3)2O2(PO4)2]3(H2O)16 P 21/c 2/m
Help on Strunz Class: Strunz Class: 08.EC.40 08 - PHOSPHATES, ARSENATES, VANADATES
  08.E - Uranyl Phosphates and Arsenates
  08.EC -UO2:RO4 = 3:2
 
08.EC.40 Bergenite Ca2Ba4[(UO3)2O2(PO4)2]3(H2O)16 P 21/c 2/m
 

Other Bergenite Information
Help on References: References: NAME( AntBidBlaNic4) PHYS. PROP.(AntBidBlaNic4, canmin, v 41, p 91) OPTIC PROP.(AntBidBlaNic4)
Help on See Also: See Also: Links to other databases for Bergenite :
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

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

Bergenite

Ca2Ba4[(UO3)2O2(PO4)2]3 (H2O)16
Dana No: 42.04.05.03 Strunz No: 08.EC.40
Locality:

 

Notes: