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Strakhovite

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About StrakhoviteHide

Nikolai M. Strakhov
Formula:
NaBa3Mn2+2Mn3+2Si6O19(OH)3
authors gave the formula NaBa3Mn2+2Mn3+2[Si4O10(OH)2][Si2O7]O2(F,OH)·H2O More recent investigation shows absence of fluorine in the mineral.
Colour:
Black, greenish tint
Lustre:
Vitreous, Greasy
Hardness:
5 - 6
Crystal System:
Orthorhombic
Name:
Named after Nikolai Mikhailovich Strakhov (Николая Михайловича Страхова) (2 (15) April 1900 Bolkhov, Bolkhov district, Orel province, Russian Empire - 13 July 1978, Moscow, USSR), petrologist, geologist and geochemist. He is considered one of the founders of modern lithology.
This page provides mineralogical data about Strakhovite.


Classification of StrakhoviteHide

Approved
Approval Year:
1993
First Published:
1994
9.CF.20

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

Pronounciation of StrakhoviteHide

Pronounciation:
PlayRecorded byCountry
Jolyon & Katya RalphUnited Kingdom

Physical Properties of StrakhoviteHide

Vitreous, Greasy
Transparency:
Translucent
Colour:
Black, greenish tint
Streak:
Green
Hardness:
5 - 6 on Mohs scale

Optical Data of StrakhoviteHide

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

Formula:
NaBa3Mn2+2Mn3+2Si6O19(OH)3

authors gave the formula NaBa3Mn2+2Mn3+2[Si4O10(OH)2][Si2O7]O2(F,OH)·H2O More recent investigation shows absence of fluorine in the mineral.
IMA Formula:
NaBa3(Mn2+,Mn3+)4[Si4O10(OH)2][Si2O7]O2 · (F,OH) · H2O

Crystallography of StrakhoviteHide

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

Type Occurrence of StrakhoviteHide

Reference:
Kalinin, V.V., Pushcharovsky, D.Y., Yamnova, N.A., Dikov, Y.P., Borisovsky, S.E. (1994) Strakhovite NaBa3(Mn2+, Mn3+)4Si6O19(OH)3 — a new Na-bearing silicate of Ba and Mn. Zapiski Vserossijskogo Mineralogicheskogo Obshchestva: 123(4): 94-97.

Synonyms of StrakhoviteHide

Other Language Names for StrakhoviteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Braunite3 photos of Strakhovite associated with Braunite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

9.CF.05AshburtonitePb4Cu4(Si4O12)(HCO3)4(OH)3Cl · H2OTet.
9.CF.10Kainosite-(Y)Ca2(Y,Ce)2(Si4O12)(CO3) · H2OOrth. mmm (2/m 2/m 2/m)
9.CF.15ClinophosinaiteNa12(Ca,Sr)4(Si4O12)(PO4)4Mon.
9.CF.15Phosinaite-(Ce)Na13Ca2(Ce,La,Th,Nd,Pr)(Si4O12)(PO4)4Orth.
9.CF.25Cerchiaraite-(Mn)Ba4Mn3+4(Si4O12)O2(OH)4Cl2[Si2O3(OH)4]Tet.

Other InformationHide

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 StrakhoviteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Yamnova, N.A., Puscharovskii, D.Y., Mernaf, T., Kalinin, V.V., Kalacheva, L.V. (1992) Crystal structure of a new natural Na, Ba, Mn-fluorosilicate. Kristallografiya: 37: 345-351.
Kalinin, V.V., Pushcharovsky, D.Y., Yamnova, N.A., Dikov, Y.P., Borisovsky, S.E. (1994) Strakhovite NaBa3(Mn2+, Mn3+)4Si6O19(OH)3 — a new Na-bearing silicate of Ba and Mn. Zapiski Vserossijskogo Mineralogicheskogo Obshchestva: 123(4): 94-97.
Jambor, J.L., Pertsev, N.N., Roberts, A.C. (1996) New mineral names. American Mineralogist: 81: 249-254.
New Minerals (1997) New Minerals 1990-1994.

Internet Links for StrakhoviteHide

Localities for StrakhoviteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Japan
 
  • Kyushu Region
    • Oita Prefecture
      • Saiki City
Nishio-Hamane, D., Ogoshi, Y., & Minakawa, T. (2012). Miyahisaite, (Sr, Ca) 2Ba3 (PO4) 3F, a new mineral of the hedyphane group in the apatite supergroup from the Shimoharai mine, Oita Prefecture, Japan. Journal of Mineralogical and Petrological Sciences, 107(3), 121-126.
Russia
 
  • Far-Eastern Region
    • Khabarovskiy Kray
      • Taikan Ridge
[MinRec 27:306]
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
Mineral and/or Locality  
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