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Ramanite-(Rb) Mineral Data

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General Ramanite-(Rb) Information

Help on Chemical  Formula: Chemical Formula: Rb[B5O6(OH)4]•2H2O
Help on Composition: Composition: Molecular Weight = 339.57 gm
   Rubidium  25.17 %  Rb   27.52 % Rb2O
   Boron     15.92 %  B    51.25 % B2O3
   Hydrogen   2.37 %  H    21.22 % H2O
   Oxygen    56.54 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: RbB5O6OH4•2(H2O)
Help on Environment: Environment: Melt and fluid inclusions in a pegmatite sample from the Island of Elba, Neso-pentaborate identified by Raman spectroscopy.
Help on IMA Status: IMA Status: Approved IMA 2007 (Dana # Added)
Help on Locality: Locality: San Piero in Campo, Elba, Italy Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Chandrasekhara Venkata Raman (1888-1970), Nobel Prize winner in Physics in 1930 for discovering the effect that bears his name.
Help on Synonym: Synonym: IMA2007-006
  Rubidium pentaborate tetrahydrate
 

Ramanite-(Rb) Image

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  Ramanite-(Rb)   Ramanite-(Cs)   Santite

Comments: Unheated Type-B melt inclusions in graphic quartz. 1 = ramanite-(Cs), 2 = sassolite, 3 = ramanite-(Rb), 4 = santite, 5 = topaz, V = vapor. (AmMin, v93:1035).
Location: Graphic pegmatite quartz from the Island of Elba, Italy. Scale: Scale Bar 15µm.
© American Mineralogist

Ramanite-(Rb) Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.0311:1:0.8516
Help on Cell Dimensions: Cell Dimensions: a = 11.304, b = 10.963, c = 9.337, Z = 4; V = 1,157.09 Den(Calc)= 1.95
Help on Crystal System: Crystal System: Orthorhombic - Pyramidal H-M Symbol (mm2) Space Group: Aba2
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.554(1), 5.481(0.85), 3.391(0.63),2.826(0.47), 3.329(0.38), 6.018(0.38), 2.894(0.28), 3.259(0.26),
 

Physical Properties of Ramanite-(Rb)

Help on Color: Color: Colorless.
Help on Diaphaneity: Diaphaneity: Transparent
Help on Habit: Habit: Inclusions - Generally found as inclusions in other minerals.
 

Optical Properties of Ramanite-(Rb)

Help on Optical Data: Optical Data: Biaxial (?)
  NCalc= 1.42 - from Gladstone-Dale relationship (KC = 0.2176) where Ncalc=Dcalc*KC+1
 

Calculated Properties of Ramanite-(Rb)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=1.91 gm/cc
note: Specific Gravity of Ramanite-(Rb) =1.95 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PERamanite-(Rb) = 24.91 barns/electron
U=PERamanite-(Rb) x relectron= 47.48 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 10,440.71 (Gamma Ray American Petroleum Institute Units)
Concentration of Ramanite-(Rb) per GRapi unit = 95.78 (PPM)

Ramanite-(Rb) is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram.

Estimated Radioactivity from Ramanite-(Rb) - weak
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 / 9.93 cm 224,257 6.06E-06 10,440.71 3.43
100 gm / 4.61 cm 22,426 6.06E-07 1,044.07 0.34
10 gm / 2.14 cm 2,243 6.06E-08 104.41 0.03
1 gm / 9.93 mm 224 6.06E-09 10.44 0.00
0.1 gm / 4.61 mm 22 6.06E-10 1.04 0.00
0.01 gm / 2.14 mm 2 6.06E-11 0.10 0.00
0.001 gm / 0.99 mm 0 6.06E-12 0.01 0.00

Weight of pure Ramanite-(Rb) in grams (gm) and Calculated Diameter of a Sphere with a Density of 1.95 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
 

Ramanite-(Rb) Classification

Help on  Dana Class: Dana Class: 26.05.02.02 (26)Hydrated Borates Containing Hydroxyl or Halogen
  (26.05)Dana Type
  (26.05.02)Santite Group
 
26.05.02.01 Santite KB5O6(OH)4•2(H2O) Aba2 mm2
 
26.05.02.02 Ramanite-(Rb)! Rb[B5O6(OH)4]•2H2O Aba2 mm2
 
26.05.02.03 Ramanite-(Cs)! Cs[B5O6(OH)4]•2H2O C 2/c 2/m
Help on  Strunz Class: Strunz Class: 06.EA.10 06 - BORATES
  06.E - Pentaborates
  06.EA -Neso-pentaborates
 
06.EA.10 Santite KB5O6(OH)4•2(H2O) Aba2 mm2
 
06.EA.10 Ramanite-(Rb)! Rb[B5O6(OH)4]•2H2O Aba2 mm2
 
06.EA.10 Ramanite-(Cs)! Cs[B5O6(OH)4]•2H2O C 2/c 2/m
 

Other Ramanite-(Rb) Information

Help on References: References: NAME( AmMin, v93:1034) PHYS. PROP.(AmMin, v93:1034) OPTIC PROP.(AmMin, v93:1034)
Help on See Also: See Also: Links to other databases for Ramanite-(Rb) :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Print or Cut-and-Paste your Ramanite-(Rb) Specimen Label here :

Ramanite-(Rb)

Rb[B5O6(OH)4]•2H2O
Dana No: 26.05.02.02 Strunz No: 06.EA.10
Locality:

 

Notes:

 

 
   
 


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