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Strakhovite

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Dzhavodi Area, Ir-Nimi manganese deposit, Taikan Ridge, Khabarovskiy Kray, Far-Eastern Region, Russia
© Pavel M. Kartashov

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Formula:
NaBa
 
3
(Mn,Mn)
 
4
Si
 
6
O
 
19
(OH)
 
3
System:OrthorhombicColour:Black, greenish tint
Lustre:Vitreous, GreasyHardness:5 - 6
Name:Named after N.M. Strakhov (1900-1978), Russian petrologist.
This page provides mineralogical data about Strakhovite.

Classification of Strakhovite

IMA status:Approved 1993
Strunz 8th edition ID:8/F.33-20
Nickel-Strunz 10th (pending) edition ID:9.CF.20

9 : SILICATES (Germanates)
C : Cyclosilicates
F : [Si4O12]8- 4-membered single rings, with insular complex anions
Dana 8th edition ID:64.3.2.1

64 : CYCLOSILICATES Rings with Other Anions and Insular Silicate Groups
3 : Rings with Other Anions and Insular Silicate Groups: 4-membered rings with [Si2O7] dimers
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Type Occurrence of Strakhovite

Co-type Localities:Dzhavodi Area, Ir-Nimi manganese deposit, Taikan Ridge, Khabarovskiy Kray, Far-Eastern Region, Russia
Zaoblachnyi Area, Ir-Nimi manganese deposit, Taikan Ridge, Khabarovskiy Kray, Far-Eastern Region, Russia
Year of Discovery:1994

Physical Properties of Strakhovite

Lustre:Vitreous, Greasy
Diaphaneity (Transparency):Translucent
Colour:Black, greenish tint
Streak:Green
Hardness (Mohs):5 - 6

Crystallography of Strakhovite

Crystal System:Orthorhombic
Cell Parameters:a = 23.42Å, b = 12.27Å, c = 7.18Å
Ratio:a:b:c = 1.909 : 1 : 0.585
Unit Cell Volume:V 2,063.27 ų (Calculated from Unit Cell)

Optical Data of Strakhovite

Type:Biaxial (+)
RI values: nα = 1.767 nβ = 1.793 nγ = 1.871
2V:Measured: 60° to 65°, Calculated: 64°
Maximum Birefringence:δ = 0.104

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Very High
Dispersion:strong

Chemical Properties of Strakhovite

Formula:
NaBa
 
3
(Mn,Mn)
 
4
Si
 
6
O
 
19
(OH)
 
3
Essential elements:Ba, H, Mn, Na, O, Si
All elements listed in formula:Ba, H, Mn, Na, O, Si

Relationship of Strakhovite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
9.CF.05Ashburtonite
Pb
 
4
Cu
 
4
[(OH)
 
3
|Cl|(HCO
 
3
)
 
4
|Si
 
4
O
 
12
] · H
 
2
O
9.CF.10Kainosite-(Y)
Ca
 
2
(Y,Ce)
 
2
Si
 
4
O
 
12
CO
 
3
·H
 
2
O
9.CF.15Clinophosinaite
Na
 
12
(Ca,Sr)
 
4
(PO
 
4
)
 
4
(Si
 
4
O
 
12
)
9.CF.15Phosinaite-(Ce)
Na
 
13
Ca
 
2
(Ce,La,Th,Nd,Pr)[(PO
 
4
)
 
4
|Si
 
4
O
 
12
]
9.CF.25Cerchiaraite
Ba
 
4
Mn
 
4
Si
 
6
(O,OH,Cl)
 
26

Other Names for Strakhovite

Synonyms:
IMA1993-005
Other Languages:
German:Strakhovit
Russian:Страховит
Spanish:Strakhovita

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 Strakhovite

Reference List:Zapiski Vsesoyuznyi Mineralogicheskoe Obshchestva (1994): 123(4): 94-97.

New Minerals (1997), New Minerals 1990-1994.

Articles/Blogs about Strakhovite

Internet Links for Strakhovite

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    Localities for Strakhovite

    (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
     
    • Far-Eastern Region
      • Khabarovskiy Kray
        • Taikan Ridge
    		[MinRec 27:306]
    Mineral and/or Locality
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