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Rudenkoite Mineral Data
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General Rudenkoite Information
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 Chemical Formula: |
Sr3Al3[(Si,Al)4O10](OH,O)8Cl2•H2O |
| Composition: |
Molecular Weight = 877.08 gm |
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Barium 5.17 % Ba 5.77 % BaO |
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Strontium 28.17 % Sr 33.32 % SrO |
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Calcium 0.59 % Ca 0.83 % CaO |
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Aluminum 10.74 % Al 20.29 % Al2O3 |
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Silicon 11.14 % Si 23.84 % SiO2 |
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Hydrogen 1.09 % H 9.74 % H2O |
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Chlorine 8.73 % Cl 8.73 % Cl |
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- %
Cl -1.97 % -O=Cl2 |
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Oxygen 34.37 % O |
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______ ______ |
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100.00 % 100.54 % = TOTAL OXIDE |
| Empirical Formula: |
Sr2.82Ba0.33Ca0.13Al3.49Si3.48O10.16(OH)7.88Cl2.16�0.8(H2O) |
| Environment: |
Formed as a metasomatic product of prehnitization and is found in a psuedomorph of prehnite after scapolite. |
| IMA Status: |
Approved IMA 2005 (Dana # Added) |
| Locality: |
Emel'dzhaksky phlogopite deposit, Aldan province, Aldan Shield, southern Yakutsk, Russia. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Sergey Alexandrovich Rudenko (1917-1992). Professor at the St. Petersburg (Leningrad) Mining Institute. |
| Synonym: |
IMA2003-060 |
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Rudenkoite Image |
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Images:
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Rudenkoite
Comments: White fragment of rudenkoite embedded in epoxy, co-type material.
Location: 80 km SEE of Aldan, Yakutia, Russia.
Scale: See Image.
© Rruff Database |
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Rudenkoite Crystallography
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| Axial Ratios: |
a:b:c =0.8114:1:1.4166 |
| Cell Dimensions: |
a = 5.893, b = 7.262, c = 10.288, Z = 1; beta = 97.2° V = 436.80 Den(Calc)= 3.33 |
| Crystal System: |
Monoclinic Space Group: P 2/m, P 2 or Pm |
| 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), |
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Physical Properties of Rudenkoite
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| Cleavage: |
{001} Distinct |
| Color: |
White. |
| Diaphaneity: |
Translucent |
| Fracture: |
Flexible - Flexible fragments. |
| Habit: |
Aggregates - Made of numerous individual crystals or clusters. |
| Habit: |
Pseudomorphous - Occurs in the form of another mineral. |
| Habit: |
Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite) |
| Hardness: |
1.5 - Between Talc and Gypsum |
| Luster: |
Silky |
| Streak: |
white |
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Optical Properties of Rudenkoite
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| Gladstone-Dale: |
CI calc= 0.068 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1954,KC= 0.2097
Ncalc = 1.7 |
| 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. |
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Calculated Properties of Rudenkoite
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| Electron Density: |
Bulk Density (Electron Density)=3.18 gm/cc
note: Specific Gravity of Rudenkoite =3.33 gm/cc.
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| Fermion Index: |
Fermion Index = 0.03
Boson Index = 0.97 |
| Photoelectric: |
PERudenkoite = 54.25 barns/electron
U=PERudenkoite x rElectron Density= 172.69 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Rudenkoite is Not Radioactive |
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Rudenkoite Classification
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| Dana Class: |
72.01.04.02 (72)Phyllosilicate Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings |
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(72.01)with 4-membered rings |
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(72.01.04)Dana Group |
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72.01.04.01 Amstallite CaAl(Si,Al)4O8(OH)4•((H2O),Cl) C 2/c 2/m |
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72.01.04.02 Rudenkoite! Sr3Al3[(Si,Al)4O10](OH,O)8Cl2•H2O P 2/m, P 2 or Pm Mono |
| Strunz Class: |
09.HA.50 09 - SILICATES (Germanates) |
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09.H - Unclassified Silicates |
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09.HA -With alkali and alkali-earth Elements |
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09.HA.50 Rudenkoite! Sr3Al3[(Si,Al)4O10](OH,O)8Cl2•H2O P 2/m, P 2 or Pm Mono |
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Other Rudenkoite Information
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| References: |
NAME( AmMin, 90:770) PHYS. PROP.(AmMin, 90:770) OPTIC PROP.(AmMin, 90:770) |
| 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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Rudenkoite
Sr3Al3[(Si,Al)4O10](OH,O)8Cl2•H2O
Dana No: 72.01.04.02 Strunz No: 09.HA.50
Locality:
Notes:
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