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Kononovite

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About KononoviteHide

Oleg Vasilievich Kononov
Formula:
NaMg(SO4)F
Colour:
White
Lustre:
Vitreous
Hardness:
3
Specific Gravity:
2.91
Crystal System:
Monoclinic
Member of:
Name:
Named in honour of the Russian mineralogist Oleg V. Kononov (born 1932), Moscow State University.
Isostructural with phosphates and arsenates of the tilasite (durangite) group, and with silicates of the titanite group. The first sulphate member of the tilasite group. Chemically quite similar to krasheninnikovite.

Supergene alteration of kononovite may lead to the formation of uklonskovite.

Crystallographic data (space group) is set basing on similarity to the synthetic analogue, that has almost identical PXRD pattern.



Classification of KononoviteHide

Approved
Approval Year:
2013

Physical Properties of KononoviteHide

Vitreous
Transparency:
Transparent, Translucent
Colour:
White
Comment:
transparent in tiny grains but translucent in blocky crystals
Hardness:
Tenacity:
Brittle
Cleavage:
Imperfect/Fair
one direction of imperfect cleavage is observed.
Comment:
somewhat plastic
Density:
2.91 g/cm3 (Measured)    2.945 g/cm3 (Calculated)

Optical Data of KononoviteHide

Type:
Biaxial (+)
RI values:
nα = 1.488(2) nβ = 1.491(2) nγ = 1.496(2)
2V:
Measured: 75° (5)
Max Birefringence:
δ = 0.008
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate

Chemical Properties of KononoviteHide

Formula:
NaMg(SO4)F

Crystallography of KononoviteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/b
Setting:
C2/c
Cell Parameters:
a = 6.662(2) Å, b = 8.584(3) Å, c = 7.035(2) Å
β = 114.06(3)°
Ratio:
a:b:c = 0.776 : 1 : 0.82
Unit Cell V:
367.4 ų
Z:
4
Morphology:
Prismatic to thick tabular crystals. Forming clusters or crusts.
Comment:
Space group by analogy to the synthetic analogue

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
4.766(38)
3.567(33)
3.233(82)
3.210(55)
3.041(100)
2.589(53)
2.571(38)
2.269(33)
Comments:
From Type Description.

Type Occurrence of KononoviteHide

General Appearance of Type Material:
As prismatic to thick tabular crystals up to 0.04 × 0.06 × 0.1 mm, forming clusters or interrupted crusts up to several cm2.
Place of Conservation of Type Material:
Type material is deposited in the collections of the Fersman Mineralogical Museum of the Russian Academy of Sciences, Moscow, Russia, registration number 4452/1
Geological Setting of Type Material:
a fumarole
Associated Minerals at Type Locality:

Synonyms of KononoviteHide

Relationship of Kononovite to other SpeciesHide

Member of:
Other Members of this group:
DurangiteNaAl(AsO4)FMon. 2/m : B2/b
IsokiteCaMg(PO4)FMon. 2/m : B2/b
LacroixiteNaAl(PO4)FMon. 2/m : B2/b
MaxwelliteNaFe3+(AsO4)FMon.
PanasqueiraiteCaMg(PO4)(OH,F)Mon.
TilasiteCaMg(AsO4)FMon. m : Bb

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 KononoviteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Pekov, I.V., Krzhizhanovskaya, M.G., Yapaskurt, V.O., Belakovskiy, D.I., Chukanov, N.V., Lykova, I.S. and Sidorov, E.G. (2014) Kononovite, IMA 2013-116. CNMNC Newsletter No. 19, February 2014, page 169; Mineralogical Magazine, 78, 165-170.
Pekov, I.V., Krzhizhanovskaya, M.G., Yapaskurt, V.O., Belakovskiy, D.I., Chukanov, N.V., Lykova, I.S., Sidorov, E.G. (2015): Kononovite, NaMg(SO4)F, a new mineral from the Arsenatnaya fumarole, Tolbachik volcano, Kamchatka, Russia. European Journal of Mineralogy, 27, 575-580.

Internet Links for KononoviteHide

Localities for KononoviteHide

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.
Russia (TL)
 
  • Far-Eastern Region
    • Kamchatka Oblast'
      • Tolbachik volcano
        • Great Fissure eruption (Main Fracture)
          • Northern Breakthrough (North Breach)
            • Second scoria cone
Pekov, I.V., Krzhizhanovskaya, M.G., Yapaskurt, V.O., Belakovskiy, D.I., Chukanov, N.V., Lykova, I.S. and Sidorov, E.G. (2014) Kononovite, IMA 2013-116. CNMNC Newsletter No. 19, February 2014, page 169; Mineralogical Magazine, 78, 165-170.; Pekov, I.V., Krzhizhanovskaya, M.G., Yapaskurt, V.O., Belakovskiy, D.I., Chukanov, N.V., Lykova, I.S., Sidorov, E.G. (2015): Kononovite, NaMg(SO4)F, a new mineral from the Arsenatnaya fumarole, Tolbachik volcano, Kamchatka, Russia. European Journal of Mineralogy, 27, 575-580
Mineral and/or Locality  
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