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Rudenkoite

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Formula:
Sr
 
3
(Al
 
3.5
Si
 
3.5
)O
 
10
(OH,O)
 
8
Cl
 
2
 · H
 
2
O
System:MonoclinicColour:White
Hardness:1½
This page provides mineralogical data about Rudenkoite.

Classification of Rudenkoite

IMA status:Approved 2003
Nickel-Strunz 10th (pending) edition ID:9.HA.50

9 : SILICATES (Germanates)
H : Unclassified silicates
A : With Alkali and Alkali-earth Elements
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Type Occurrence of Rudenkoite

Type Locality:Emeldzhakskoe (Emel'dzhak) phlogopite deposit, Aldan, Aldan Shield, Saha Republic (Sakha Republic; Yakutia), Eastern-Siberian Region, Russia
General Appearance of Type Material:White spheroidal aggregates to 7 mm; aggregates of tiny flexible fibers

Physical Properties of Rudenkoite

Colour:White
Hardness (Mohs):1½
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°
Maximum Birefringence:δ = 0.028

Chart 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:
Sr
 
3
(Al
 
3.5
Si
 
3.5
)O
 
10
(OH,O)
 
8
Cl
 
2
 · H
 
2
O
All elements listed in formula:Al, Cl, H, O, Si, Sr

Relationship of Rudenkoite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
9.HA.05Ertixiite
Na
 
2
Si
 
4
O
 
9
9.HA.10Kenyaite
Na
 
2
Si
 
22
O
 
41
(OH)
 
8
 · 6H
 
2
O
9.HA.20Wawayandaite
Ca
 
6
Mn
 
2
BBe
 
9
Si
 
6
O
 
23
(OH,Cl)
 
15
9.HA.25Magbasite
KBa(Al,Sc)(Mg,Fe)
 
6
Si
 
6
O
 
20
F
 
2
9.HA.30Afanasyevaite
Ca
 
8
[Si
 
2
O
 
7
]OCl
 
2
9.HA.40Igumnovite
Ca
 
3
Al
 
2
(SiO
 
4
)
 
2
Cl
 
4
9.HA.55Foshallasite
Ca
 
3
[Si
 
2
O
 
7
] · 3H
 
2
O(?)
9.HA.60Nagelschmidtite
Ca
 
7
(SiO
 
4
)
 
2
(PO
 
4
)
 
2
9.HA.65Caryochroite
(Na,Sr)
 
3
(Fe
3+
 
,Mg)
 
10
[(O,OH)
 
9
|Ti
 
2
Si
 
12
O
 
37
] · (H
 
2
O, O, OH)
 
17
9.HA.70Juanite
Ca
 
10
Mg
 
4
Al
 
2
Si
 
11
O
 
39
 · 4H
 
2
O or near
9.HA.75Tacharanite
Ca
 
12
Al
 
2
Si
 
18
O
 
51
 · 18H
 
2
O
9.HA.80Oyelite
Ca
 
10
Si
 
8
B
 
2
O
 
29
 · 12.5H
 
2
O
9.HA.85Denisovite
Ca
 
2
(K,Na)Si
 
3
O
 
8
(F,OH)
 
2
9.HA.90Tiettaite
(Na,K)
 
17
FeTiSi
 
16
O
 
29
(OH)
 
30
 · 2H
 
2
O

Other Names for Rudenkoite

Synonyms:
IMA2003-060
Other Languages:

Other Information

Health Warning: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

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
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    • Localities for Rudenkoite

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    (TL) indicates type locality. ? 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
      • Saha Republic (Sakha Republic; Yakutia)
        • Aldan Shield
          • Aldan
    		Am Min 90:770-771
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