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Rudenkoite

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Formula:
Sr3(Al3.5Si3.5)O10(OH,O)8Cl2 · H2O
System:
Monoclinic
Colour:
White
Hardness:
This page provides mineralogical data about Rudenkoite.

Classification of Rudenkoite

Approved 2003
9.HA.50

9 : SILICATES (Germanates)
H : Unclassified silicates
A : With Alkali and Alkali-earth Elements
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http://www.mindat.org/min-26665.html
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First Recorded Occurrence of Rudenkoite

General Appearance of First Recorded Material:
White spheroidal aggregates to 7 mm; aggregates of tiny flexible fibers

Physical Properties of Rudenkoite

Colour:
White
Hardness (Mohs):
Tenacity:
Flexible

Crystallography of Rudenkoite

Crystal System:
Monoclinic
Cell Parameters:
a = 5.893(5) Å, b = 7.262(5) Å, c = 10.288(8) Å
β = 97.23(3)°
Ratio:
a:b:c = 0.811 : 1 : 1.417
Unit Cell Volume:
V 436.77 ų (Calculated from Unit Cell)
Comment:
P2/m, P2, or Pm.

Optical Data of Rudenkoite

Type:
Biaxial (+)
RI values:
nα = 1.693(2) nβ = 1.648(2) nγ = 1.665(2)
2V:
Measured: 75° (10), Calculated: 72°
Max Birefringence:
δ = 0.028
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
Moderate r>v
Pleochroism:
Not Visible

Chemical Properties of Rudenkoite

Formula:
Sr3(Al3.5Si3.5)O10(OH,O)8Cl2 · H2O
All elements listed in formula:

Relationship of Rudenkoite to other Species

9.HA.05ErtixiiteNa2Si4O9
9.HA.10KenyaiteNa2Si22O41(OH)8 · 6H2O
9.HA.20WawayandaiteCa6Mn2BBe9Si6O23(OH,Cl)15
9.HA.25MagbasiteKBaFe3+Mg7Si8O22(OH)2F6
9.HA.30AfanasyevaiteCa8[Si2O7]OCl2
9.HA.40IgumnoviteCa3Al2(SiO4)2Cl4
9.HA.55FoshallasiteCa3[Si2O7] · 3H2O(?)
9.HA.60NagelschmidtiteCa7(SiO4)2(PO4)2
9.HA.65Caryochroite(Na,Sr)3(Fe3+,Mg)10[(O,OH)9|Ti2Si12O37] · (H2O,O,OH)17
9.HA.70JuaniteCa10Mg4Al2Si11O39 · 4H2O or near
9.HA.75TacharaniteCa12Al2Si18O51 · 18H2O
9.HA.80OyeliteCa10Si8B2O29 · 12.5H2O
9.HA.85DenisoviteCa2(K,Na)Si3O8(F,OH)2
9.HA.90Tiettaite(Na,K)17FeTiSi16O29(OH)30 · 2H2O

Other Names for Rudenkoite

Name in Other Languages:
Simplified Chinese:鲁登克石
Traditional Chinese:魯登克石

Other Information

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Rudenkoite

Reference List:
Chukanov, N.V. et al. (2004): ZVMO (Proceedings of the Russian Mineral Society), 133(3), 37-41.

Internet Links for Rudenkoite

Localities for Rudenkoite

(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Russia
 
  • Eastern-Siberian Region
    • Sakha Republic (Saha Republic; Yakutia)
      • Aldan Shield
        • Aldan
Am Min 90:770-771
Mineral and/or Locality  
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