Mineralogy Database

Rudenkoite Mineral Data

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General Rudenkoite Information

Help on Chemical  Formula: Chemical Formula: Sr3Al3[(Si,Al)4O10](OH,O)8Cl2•H2O
Help on Composition: Composition: Molecular Weight = 877.08 gm
   Barium      5.17 %  Ba    5.77 % BaO
   Strontium  28.17 %  Sr   33.32 % SrO
   Calcium     0.59 %  Ca    0.83 % CaO
   Aluminum   10.74 %  Al   20.29 % Al2O3
   Silicon    11.14 %  Si   23.84 % SiO2
   Hydrogen    1.09 %  H     9.74 % H2O
   Chlorine    8.73 %  Cl    8.73 % Cl
                -   %   Cl   -1.97 % -O=Cl2   
   Oxygen     34.37 %  O
             ______        ______ 
             100.00 %      100.54 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Sr2.82Ba0.33Ca0.13Al3.49Si3.48O10.16(OH)7.88Cl2.16�0.8(H2O)
Help on Environment: Environment: Formed as a metasomatic product of prehnitization and is found in a psuedomorph of prehnite after scapolite.
Help on IMA Status: IMA Status: Approved IMA 2005 (Dana # Added)
Help on Locality: Locality: Emel'dzhaksky phlogopite deposit, Aldan province, Aldan Shield, southern Yakutsk, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Sergey Alexandrovich Rudenko (1917-1992). Professor at the St. Petersburg (Leningrad) Mining Institute.
Help on Synonym: Synonym: IMA2003-060

Rudenkoite Image

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Comments: White fragment of rudenkoite embedded in epoxy, co-type material.
Location: 80 km SEE of Aldan, Yakutia, Russia. Scale: See Image.
© Rruff Database

Rudenkoite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.8114:1:1.4166
Help on Cell Dimensions: Cell Dimensions: a = 5.893, b = 7.262, c = 10.288, Z = 1; beta = 97.2° V = 436.80 Den(Calc)= 3.33
Help on Crystal System: Crystal System: Monoclinic Space Group: P 2/m, P 2 or Pm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.9(1)(121), 2.96(1)(022), 10.13(1)(001),2.182(0.8)(221), 3.23(0.8)(112), 1.855(0.7)(105), 2.104(0.6)(203),

Physical Properties of Rudenkoite

Help on Cleavage: Cleavage: {001} Distinct
Help on Color: Color: White.
Help on Diaphaneity: Diaphaneity: Translucent
Help on Fracture: Fracture: Flexible - Flexible fragments.
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Pseudomorphous - Occurs in the form of another mineral.
Help on Habit: Habit: Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Help on Hardness: Hardness: 1.5 - Between Talc and Gypsum
Help on Luster: Luster: Silky
Help on Streak: Streak: white

Optical Properties of Rudenkoite

Help on Gladstone-Dale: Gladstone-Dale: CI calc= 0.068 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1954,KC= 0.2097
Ncalc = 1.7
Help on Optical Data: Optical Data: Biaxial (+), a=1.639, b=1.648, g=1.665, bire=0.0260, 2V(Calc)=74, 2V(Meas)=75. Dispersion r > v medium.

Calculated Properties of Rudenkoite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.18 gm/cc
note: Specific Gravity of Rudenkoite =3.33 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PERudenkoite = 54.25 barns/electron
U=PERudenkoite x rElectron Density= 172.69 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Rudenkoite is Not Radioactive

Rudenkoite Classification

Help on  Dana Class: Dana Class: (72)Phyllosilicate Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings
  (72.01)with 4-membered rings
  (72.01.04)Dana Group Amstallite CaAl(Si,Al)4O8(OH)4•((H2O),Cl) C 2/c 2/m Rudenkoite! Sr3Al3[(Si,Al)4O10](OH,O)8Cl2•H2O P 2/m, P 2 or Pm Mono
Help on  Strunz Class: Strunz Class: 09.HA.50 09 - SILICATES (Germanates)
  09.H - Unclassified Silicates
  09.HA -With alkali and alkali-earth Elements
09.HA.50 Rudenkoite! Sr3Al3[(Si,Al)4O10](OH,O)8Cl2•H2O P 2/m, P 2 or Pm Mono

Other Rudenkoite Information

Help on References: References: NAME( AmMin, 90:770) PHYS. PROP.(AmMin, 90:770) OPTIC PROP.(AmMin, 90:770)
Help on See Also: See Also: Links to other databases for Rudenkoite :
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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Dana No: Strunz No: 09.HA.50





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