Rubicline Mineral Data + Say RUBICLINE

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General Rubicline Information

Help on Chemical  Formula: Chemical Formula: (Rb,K)AlSi3O8
Help on Composition: Composition: Molecular Weight = 313.11 gm
   Potassium   3.12 %  K     3.76 % K2O
   Rubidium   20.47 %  Rb   22.39 % Rb2O
   Aluminum    8.62 %  Al   16.28 % Al2O3
   Silicon    26.91 %  Si   57.57 % SiO2
   Oxygen     40.88 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Rb0.75K0.25AlSi3O8
Help on Environment: Environment: Found in a veinlet of rubidian microcline cutting pollucite in a rare-element-bearing granitic pegmatite. The rubidium dominant analog of microcline.
Help on IMA Status: IMA Status: Approved IMA 1998 (Dana # Added)
Help on Locality: Locality: San Piero in Campo, Elba, Italy. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: The name reflects its compositional and structural attributes as the rubidium analog of microcline.
Help on Synonym: Synonym: IMA1996-058
 

Rubicline Image

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Rubicline

Comments: Rubicline (white) including grains of quartz (black) in microcline (gray) associated with albite (black) and muscovite (mottled dark gray). BSE image (AmMin, 83:1336).
Location: Pollucite-bearing rare-element pegmatite at San Piero in Campo, Elba, Italy. Scale: Grain size 20 µm.
© American Mineralogist

Rubicline Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.6771:1:0.5518
Help on Cell Dimensions: Cell Dimensions: a = 8.81, b = 13.01, c = 7.18, Z = 4; alpha = 90°, beta = 116°, gamma = 88° V = 739.22 Den(Calc)= 2.81
Help on Crystal System: Crystal System: Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1
 

Physical Properties of Rubicline

Help on Color: Color: Colorless.
Help on Diaphaniety: Diaphaniety: Transparent
Help on Luster: Luster: Vitreous (Glassy)
 

Optical Properties of Rubicline

Help on Gladstone-Dale: Gladstone-Dale: CI calc= 0.016 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1864,KC= 0.1895
Help on Optical Data: Optical Data: Biaxial (?), a=1.52, b=1.524, g=1.527, bire=0.0070
 

Calculated Properties of Rubicline

Help on Electron Density: Electron Density:

relectron=2.72 gm/cc
note: rRubicline =2.81 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.01276
Boson Index = 0.98724
Help on Photoelectric: Photoelectric:

PERubicline = 21.89 barns/electron
U=PERubicline x relectron= 59.54 barns/cc.

Help on Radioactivity: Radioactivity:

GRapi = 8,449.30 (Gamma Ray American Petroleum Institute Units)

Rubicline is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram.

Estimated Radioactivity from Rubicline - mild
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 / 8.79 cm 183,355 4.96E-06 8,449.30 2.78
100 gm / 4.08 cm 18,336 4.96E-07 844.93 0.28
10 gm / 1.89 cm 1,834 4.96E-08 84.49 0.03
1 gm / 8.79 mm 183 4.96E-09 8.45 0.00
0.1 gm / 4.08 mm 18 4.96E-10 0.84 0.00
0.01 gm / 1.89 mm 2 4.96E-11 0.08 0.00
0.001 gm / 0.88 mm 0 4.96E-12 0.01 0.00

Weight of pure Rubicline in grams (gm) and Calculated Diameter of a Sphere with a Density of 2.81 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
 

Rubicline Classification

Help on  Dana Class: Dana Class: 76.1.1.7 (76)Tectosilicate Al-Si Framework
  (76.1)with Al-Si frameworks
  (76.1.1)K (Na,Ba) feldspars
 
76.1.1.1 Orthoclase KAlSi3O8 C 2/m 2/m
 
76.1.1.2 Sanidine (K,Na)(Si,Al)4O8 C 2/m 2/m
 
76.1.1.3 Hyalophane (K,Ba)Al(Si,Al)3O8 C 2/m 2/m
 
76.1.1.4 Celsian BaAl2Si2O8 I21/c 2/m
 
76.1.1.5 Microcline KAlSi3O8 C1 1
 
76.1.1.6 Anorthoclase (Na,K)AlSi3O8 C1 1
 
76.1.1.7 Rubicline ! (Rb,K)AlSi3O8 P1 1
 
76.1.1.8 Filatovite! K[(Al,Zn)2(As,Si)2O8] I2/c 2/m
Help on  Strunz Class: Strunz Class: VIII/J.06-35 VIII - Silicates
  VIII/J - Tectosilicates (network) without anions unfamiliar to the tetraheders
  VIII/J.06 - Feldspar group, Buddingtonite - Orthoclase - Slawsonite series
 
VIII/J.06-10 Buddingtonite (NH4)AlSi3O8·0.5(H2O) P 21 or P 21/m Mono
 
VIII/J.06-15 Kokchetavite! KAlSi3O8 P 6/mmm(?) 6/m 2/m 2/m
 
VIII/J.06-20 Sanidine (K,Na)(Si,Al)4O8 C 2/m 2/m
 
VIII/J.06-30 Microcline KAlSi3O8 C1 1
 
VIII/J.06-35 Rubicline (Rb,K)AlSi3O8 P1 1
 
VIII/J.06-40 Orthoclase KAlSi3O8 C 2/m 2/m
 
VIII/J.06-50 Hyalophane (K,Ba)Al(Si,Al)3O8 C 2/m 2/m
 
VIII/J.06-60 Celsian BaAl2Si2O8 I21/c 2/m
 
VIII/J.06-70 Paracelsian BaAl2Si2O8 P 21/c 2/m
 
VIII/J.06-80 Slawsonite (Sr,Ca)Al2Si2O8 P 21/a 2/m
 

Other Rubicline Information

Help on References: References: NAME( CanMin, 8/99) PHYS. PROP.(Am.Min.,Vol.83,p1335-1339,1998)
Help on See Also: See Also: Links to other databases for Rubicline :
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

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Rubicline

(Rb,K)AlSi3O8
Dana No: 76.1.1.7 Strunz No: VIII/J.06-35
Locality:

 

Notes:

 

 
   
 
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