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Chirvinskyite

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Formula:
(Na,Ca)13(Fe,Mn,□)2(Ti,Zr)5(Si2O7)4(OH,O)12·2H2O
Colour:
cream
Lustre:
Silky
Hardness:
5
Specific Gravity:
3.07
Crystal System:
Triclinic
Name:
Named in honor of Petr Nikolaevich Chirvinsky (1880–1955), Russian geologist and petrographer, head of the Petrography Department of the Perm’ State University (1943–1953), for his contributions to mineralogy and petrology, including studies of the Khibiny alkaline massif.
New structure type. Chemically somewhat similar to nafertisite, narsarsukite, and selivanovite. wöhlerite–related zirconotitano–sorosilicate.


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Classification of ChirvinskyiteHide

Approved
Approval Year:
2016

Physical Properties of ChirvinskyiteHide

Silky
Transparency:
Transparent
Colour:
cream
Streak:
white
Hardness:
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Fibrous
Density:
3.07(2) g/cm3 (Measured)    3.41 g/cm3 (Calculated)
Comment:
The difference between calculated and observed values may be caused by numerous inclusions

Optical Data of ChirvinskyiteHide

Type:
Biaxial (-)
RI values:
nα = 1.670(2) nβ = 1.690(2) nγ = 1.705(2)
2V:
Calculated: 80.9°
Max Birefringence:
δ = 0.035
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
None
Pleochroism:
Non-pleochroic

Chemical Properties of ChirvinskyiteHide

Formula:
(Na,Ca)13(Fe,Mn,□)2(Ti,Zr)5(Si2O7)4(OH,O)12·2H2O
IMA Formula:
(Na,Ca)13(Fe,Mn,◻)2(Ti,Zr)5(Si2O7)4(OH,O)12 · 2H2O

Crystallography of ChirvinskyiteHide

Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 7.0477(5) Å, b = 9.8725(2) Å, c = 12.2204(9) Å
α = 77.995(5)°, β = 82.057(6)°, γ = 89.988(5)°
Ratio:
a:b:c = 0.714 : 1 : 1.238
Unit Cell V:
823.34 ų (Calculated from Unit Cell)
Z:
1

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
7.00Å(34)
5.907Å(17)
3.956Å(23)
3.416Å(33)
2.886Å(57)
2.796Å(100)
1.741Å(25)
1.646Å(16)

Type Occurrence of ChirvinskyiteHide

General Appearance of Type Material:
forms sheaf–like and radiated aggregates (up to 6 mm in diameter) of split fibrous crystal
Place of Conservation of Type Material:
(1) collections of the Mineralogical Museum, St. Petersburg State University, Russia, catalogue No. 19657; (2) the Geological and the Mineralogical Museum, Geological Institute, Kola Science Centre, Apatity, Russia, catalogue No. 7609
Geological Setting of Type Material:
albitized alkaline pegmatite
Associated Minerals at Type Locality:
Reference:
Yakovenchuk, V.N.; Pakhomovsky, Y.A.; Panikorovskii, T.L.; Zolotarev, A.A.; Mikhailova, J.A.; Bocharov, V.N.; Krivovichev, S.V.; Ivanyuk, G.Y. (2019) Chirvinskyite, (Na,Ca)13(Fe,Mn,□)2(Ti,Nb)2(Zr,Ti)3-(Si2O7)4(OH,O,F)12, a New Mineral with a Modular Wallpaper Structure, from the Khibiny Alkaline Massif (Kola Peninsula, Russia). Minerals 2019, 9, 219.

Synonyms of ChirvinskyiteHide

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 ChirvinskyiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Yakovenchuk, V.N., Pakhomovsky, Y.A., Panikirovskii, T.L., Zolotarev, A.A., Mikhailova, J.A., Bocharov, V.N., Krivovichev, S.V., Ivanyuk, G.Y. (2016): Chirvinskyite, IMA 2016-051. CNMNC Newsletter No. 33, October 2016, page 1140; Mineralogical Magazine: 80: 1135–1144
Yakovenchuk, V.N.; Pakhomovsky, Y.A.; Panikorovskii, T.L.; Zolotarev, A.A.; Mikhailova, J.A.; Bocharov, V.N.; Krivovichev, S.V.; Ivanyuk, G.Y. (2019) Chirvinskyite, (Na,Ca)13(Fe,Mn,□)2(Ti,Nb)2(Zr,Ti)3-(Si2O7)4(OH,O,F)12, a New Mineral with a Modular Wallpaper Structure, from the Khibiny Alkaline Massif (Kola Peninsula, Russia). Minerals 2019, 9, 219.

Internet Links for ChirvinskyiteHide

Localities for ChirvinskyiteHide

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)
 
  • Murmansk Oblast
    • Khibiny Massif
Yakovenchuk, V.N., Pakhomovsky, Y.A., Panikirovskii, T.L., Zolotarev, A.A., Mikhailova, J.A., Bocharov, V.N., Krivovichev, S.V., Ivanyuk, G.Y. (2016): Chirvinskyite, IMA 2016-051. CNMNC Newsletter No. 33, October 2016, page 1140; Mineralogical Magazine: 80: 1135–1144; Yakovenchuk, V.N.; Pakhomovsky, Y.A.; Panikorovskii, T.L.; Zolotarev, A.A.; Mikhailova, J.A.; Bocharov, V.N.; Krivovichev, S.V.; Ivanyuk, G.Y. (2019) Chirvinskyite, (Na,Ca)13(Fe,Mn,□)2(Ti,Nb)2(Zr,Ti)3-(Si2O7)4(OH,O,F)12, a New Mineral with a Modular Wallpaper Structure, from the Khibiny Alkaline Massif (Kola Peninsula, Russia). Minerals 2019, 9, 219.
 
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