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Nenadkevichite

A valid IMA mineral species - grandfathered
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09707720017271925362630.jpg
Nenadkevichite

Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada
06290980017271925392941.jpg
Nenadkevichite, etc.

Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada
09688260017271925445513.jpg
Nenadkevichite, etc.

Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada
01255580017271925508174.jpg
Nenadkevichite, etc.

Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada
09707720017271925362630.jpg
Nenadkevichite

Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada
06290980017271925392941.jpg
Nenadkevichite, etc.

Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada
09688260017271925445513.jpg
Nenadkevichite, etc.

Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada
01255580017271925508174.jpg
Nenadkevichite, etc.

Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada
09707720017271925362630.jpg
Nenadkevichite

Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada
08780060017271925532228.jpg
Nenadkevichite, etc.

Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada
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About NenadkevichiteHide

07905320017271925566614.jpg
Konstantin A. Nenadkevich
Formula:
(Na,◻)8Nb4(Si4O12)2(O,OH)4 · 8H2O
Colour:
Rose-pink, very light pink, light yellow, brown; dark brown due to inclusions
Lustre:
Vitreous, Dull
Hardness:
5
Specific Gravity:
2.78 - 2.885
Crystal System:
Orthorhombic
Name:
After Konstantin Avtonomovich Nenadkevich (ĐšĐŸĐœŃŃ‚Đ°ĐœŃ‚ĐžĐœ АĐČŃ‚ĐŸĐœĐŸĐŒĐŸĐČоч ĐĐ”ĐœĐ°ĐŽĐșĐ”ÌĐČоч) [May 21 or June 2, 1880 Kashevka, now Kovel' Raion, Volyn' Oblast, Russia - June 19, 1963 Moscow, Russia] Russian mineralogist and geochemist, A.E. Fersman Mineralogical Museum, Moscow, Russia.
Labuntsovite Group, Nenadkevichite Subgroup.


Unique IdentifiersHide

Mindat ID:
2877
Long-form identifier:
mindat:1:1:2877:2

IMA Classification of NenadkevichiteHide

IMA status:
Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
(Na,◻)8Nb5+4(Si4O12)2(O,OH)4(H2O)8
First published:
1955

Classification of NenadkevichiteHide

Strunz-mindat (2026):
9.CE.30a

9 : SILICATES (Germanates)
C : Cyclosilicates
E : [Si4O12]8- 4-membered single rings (vierer-Einfachringe), without insular complex anions
Dana 8th ed.:
60.1.3.1

60 : CYCLOSILICATES Four-Membered Rings
1 : Four-Membered Rings, as Titanosilicates
Hey's CIM Ref.:
17.8.8

17 : Silicates Containing other Anions
8 : Silicates with niobate or tantalate

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference for Standard
NkvIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of NenadkevichiteHide

Lustre:
Vitreous, Dull
Transparency:
Transparent, Translucent, Opaque
Colour:
Rose-pink, very light pink, light yellow, brown; dark brown due to inclusions
Streak:
White, very light rose-pink
Hardness:
5 on Mohs scale
Tenacity:
Brittle
Cleavage:
Poor/Indistinct
On {001}
Fracture:
Irregular/Uneven
Density:
2.78 - 2.885 g/cm3 (Measured)    2.7 g/cm3 (Calculated)

Optical Data of NenadkevichiteHide

Type:
Biaxial (+)
RI values:
nα = 1.633 - 1.659 nβ = 1.642 - 1.686 nγ = 1.738 - 1.785
2V:
Measured: 31° to 45°, Calculated: 36° to 58°
Max. Birefringence:
δ = 0.105 - 0.126
Based on recorded range of RI values above.

Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.

Michel-Levy Bar The default colours simulate the birefringence range for a 30 ”m thin-section thickness. Adjust the slider to simulate a different thickness.

Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.

Surface Relief:
Moderate
Dispersion:
r > v strong
Optical Extinction:
X = a; Y = c; Z = b.
Pleochroism:
Weak
Comments:
X = colourless; Y = light yellow; Z = light rose-pink.
Comments:
Absorption: Z > Y > X.

Chemistry of NenadkevichiteHide

Mindat Formula:
(Na,◻)8Nb4(Si4O12)2(O,OH)4 · 8H2O
Element Weights:
Element% weight
O41.971 %
Nb27.080 %
Si16.372 %
Na13.402 %
H1.175 %

Calculated from ideal end-member formula.
Elements listed:
H, Na, Nb, O, Si - search for minerals with similar chemistry
Common Impurities:
Al,TR,Fe,Mn,Mg,Ba

Crystallography of NenadkevichiteHide

Crystal System:
Orthorhombic
Class (H-M):
mmm(2/m2/m2/m) - Dipyramidal
Space Group:
Pbam
Cell Parameters:
a = 7.408 Å, b = 14.198 Å, c = 7.148 Å
Ratio:
a:b:c = 0.522 : 1 : 0.503
Unit Cell V:
751.82 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Crystals equant or bladed pseudohexagonal prisms. Foliated segregations and lamellar mases.

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0006548NenadkevichiteRastsvetaeva R K, Tamazyan R A, Pushcharovsky D Y, Nadezhina T N (1994) Crystal structure and microtwinning of K-rich nenadkevichite European Journal of Mineralogy 6 503-50919940293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
3.20 Å(100)
3.10 Å(100)
1.427 Å(100)
1.289 Å(90)
2.49 Å(80)
2.58 Å(70)
1.705 Å(70)
Locality:
Natrolite Stock, Karnasurt Mountain, Lovozersky District, Murmansk Oblast, Russia
Comments:
Lovozero massif material.

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 4b: Highly evolved igneous rocks>3.0
35 : Ultra-alkali and agpaitic igneous rocks

Type Occurrence of NenadkevichiteHide

Type Locality:
ⓘ Natrolite Stock, Karnasurt Mountain, Lovozersky District, Murmansk Oblast, Russia
General Appearance of Type Material:
Foliated segregations measuring from a few millimeters to 4 x 2.5 x 0.4 cm.
Place of Conservation of Type Material:
Mining Institute, St. Petersburg, Russia, 183a/4.
A.E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia, 57260, 59411, vis4521.
Geological Setting of Type Material:
Natrolite-albite-rich pegmatite in nepheline syenite in a differentiated alkalic massif.
Associated Minerals at Type Locality:
Microcline

Other Language Names for NenadkevichiteHide

Relationship of Nenadkevichite to other SpeciesHide

Member of:
Nenadkevichite Group > Labuntsovite Supergroup
Other Members of Nenadkevichite Group:
Korobitsynite(Na,◻)4Ti2(Si4O12)(O,OH)2 · 4H2OOrth. mmm(2/m2/m2/m) : Pbam
'UM2000-63-SiO:BaHKNaNbSrTi'(H3O)4Na2K[Sr0.4Ba0.3(H2O)0.8]{[Ti4.5Nb3.5](OH)4.5O3.5)[Si4O12]4} · 4.2H2OMon. m : Bm
'Unnamed (Ca-Na-ordered analogue of Korobitsynite)'(Ca,Na)2(Ti,Nb)2(Si4O12)(OH,O)2 · 3-4H2OOrth. 222 : P21212

Common AssociatesHide

Associations Based on Photo Data:
38 photos of Nenadkevichite associated with RhodochrositeMnCO3
33 photos of Nenadkevichite associated with AegirineNaFe3+Si2O6
31 photos of Nenadkevichite associated with MicroclineK(AlSi3O8)
28 photos of Nenadkevichite associated with ElpiditeNa2ZrSi6O15 · 3H2O
28 photos of Nenadkevichite associated with GaidonnayiteNa2Zr(Si3O9) · 2H2O
16 photos of Nenadkevichite associated with PolylithioniteKLi2Al(Si4O10)(F,OH)2
15 photos of Nenadkevichite associated with AlbiteNa(AlSi3O8)
14 photos of Nenadkevichite associated with Leifite(Na,H2O)Na6[Be2Al2(Al,Si)Si15O39]F2
13 photos of Nenadkevichite associated with ZakharoviteNa4Mn5Si10O24(OH)6 · 6H2O
13 photos of Nenadkevichite associated with CalciteCaCO3

Related Minerals - Strunz-mindat GroupingHide

9.CE.Dutkevichite-(Ce)NaZnBa2Ce2Ti2Si8O26F · H2OOrth. mm2 : Ama2
9.CE.KataniteBa3NbFe3Si2O14Trig. 32 : P321
9.CE.NiobobaotiteBa4(Ti2.5Fe2+1.5)Nb4Si4O28ClTet. 4/m : I41/a
9.CE.AmaterasuiteSr4Ti6Si4O23(OH)ClOrth. mmm(2/m2/m2/m) : Fddd
9.CE.SteiningeriteBa2Zr2(Si4O12)O2Tet. 4/mmm(4/m2/m2/m) : P4/mbm
9.CE.05PapagoiteCaCu[H3AlSi2O9]Mon. 2/m : B2/m
9.CE.10VerplanckiteBa4Mn2+2Si4O12(OH,H2O)3Cl3Hex. 6/mmm(6/m2/m2/m) : P6/mmm
9.CE.15BaotiteBa4(Ti,Nb,W)8O16(SiO3)4ClTet. 4/m : I41/a
9.CE.20NagashimaliteBa4(V,Ti)4B2Si8O27(O,OH)2ClOrth. mmm(2/m2/m2/m) : Pmmn
9.CE.20TaramelliteBa4(Fe3+,Ti,Fe2+,Mg)4(B2Si8O27)O2ClxOrth. mmm(2/m2/m2/m) : Pmmn
9.CE.20TitantaramelliteBa4(Ti,Fe3+,Fe2+,Mg)4(B2Si8O27)O2ClxOrth. mmm(2/m2/m2/m)
9.CE.25Bario-orthojoaquinite(Ba,Sr)4Fe2Ti2[Si4O12]2O2 · H2OOrth.
9.CE.25Byelorussite-(Ce)NaBa2Ce2MnTi2[Si4O12]2O2(F,OH) · H2OOrth. mm2 : Ama2
9.CE.25Joaquinite-(Ce)NaBa2Ce2FeTi2[Si4O12]2O2(OH,F) · H2OMon. 2 : B2
9.CE.25Orthojoaquinite-(La)NaBa2La2Fe2+Ti2[Si4O12]2O2(O,OH) · H2OOrth. mmm(2/m2/m2/m)
9.CE.25StrontiojoaquiniteSr2Ba2(Na,Fe)2Ti2[Si4O12]2O2(O,OH)2 · H2OMon.
9.CE.25Orthojoaquinite-(Ce)NaBa2Ce2FeTi2[Si4O12]2O2(O,OH) · H2OOrth.
9.CE.25Strontio-orthojoaquinite(Na,Fe)2Sr2Ba2Ti2[Si4O12]2O2(O,OH)2 · H2OOrth.
9.CE.30eLabuntsovite-MnNa4K4(Ba,K)2Mn2+(Ti,Nb)8(Si4O12)4(O,OH)8 · 10-12H2OMon. 2/m : B2/m
9.CE.30bTsepinite-NaNa2(Ti,Nb)2(Si4O12)(OH,O)2 · 3H2OMon. m : Bm
9.CE.30cGjerdingenite-NaK2Na(Nb,Ti)4(Si4O12)2(OH,O)4 · 5H2OMon. 2/m : B2/m
9.CE.30hAlsakharovite-ZnNaSrKZn(Ti,Nb)4(Si4O12)2(O,OH)4 · 7H2OMon. m : Bm
9.CE.30cBurovaite-Ca(Na,K)4Ca2(Ti,Nb)8(Si4O12)4(OH,O)8 · 12H2OMon. 2/m : B2/m
9.CE.30bTsepinite-SrSr(Ti,Nb)2(Si4O12)(OH,O)2 · 3H2OMon. m : Bm
9.CE.30cGjerdingenite-MnK2Mn2+(Nb,Ti)4(Si4O12)2(O,OH)4 · 6H2OMon. 2/m : B2/m
9.CE.30bParatsepinite-Na(Na,Sr,K,Ca)7(Ti,Nb)8(Si4O12)4(O,OH)8 · nH2O n ~ 8Mon. 2/m : B2/m
9.CE.30dLemmleinite-KK2(Ti,Nb)2(Si4O12)(OH,O)2 · 4H2OOrth.
9.CE.30cKarupmÞllerite-Ca(Na,Ca,K)2Ca(Nb,Ti)4(Si4O12)2(O,OH)4 · 7H2OMon. 2/m : B2/m
9.CE.30cLepkhenelmite-Zn(Ba,K)2Zn(Ti,Nb)4(Si4O12)2(O,OH)4 · 7H2OMon. m : Bm
9.CE.30hGutkovaite-MnK2CaMn(Ti,Nb)4(Si4O12)2(O,OH)4 · 5H2OMon. m : Bm
9.CE.30eLabuntsovite-MgNa4K4(Ba,K)2Mg(Ti,Nb)8(Si4O12)4(O,OH)8 · 10H2OMon. 2/m : B2/m
9.CE.30eLabuntsovite-FeNa4K4(Ba,K)2Fe2+(Ti,Nb)8(Si4O12)4(O,OH)8 · 10H2OMon. 2/m : B2/m
9.CE.30cKuzmenkoite-ZnK2Zn(Ti,Nb)4(Si4O12)2(OH,O)4 · 6-8H2OMon. m : Bm
9.CE.30fParalabuntsovite-MgNa8K8Mg4Ti16(Si4O12)8(OH,O)16 · 20-24H2OMon. 2/m : B2/m
9.CE.30dLemmleinite-BaNa2K2Ba(Ti,Nb)4(Si4O12)2(O,OH)4 · 5H2OMon. 2/m : B2/m
9.CE.30gOrganovaite-MnK2Mn(Nb,Ti)4(Si4O12)2(O,OH)4 · 5-7H2OMon. 2/m : B2/m
9.CE.30gOrganovaite-ZnK2Zn(Nb,Ti)4(Si4O12)2(O,OH)4 · 6H2OMon. 2/m : B2/m
9.CE.30bVuoriyarvite-KK2(Nb,Ti)2(Si4O12)(O,OH)2 · 4H2OMon. m : Bm
9.CE.30cGjerdingenite-FeK2Fe2+(Nb,Ti)4(Si4O12)2(O,OH)4 · 6H2OMon. 2/m : B2/m
9.CE.30a'Unnamed (Ca-Na-ordered analogue of Korobitsynite)'(Ca,Na)2(Ti,Nb)2(Si4O12)(OH,O)2 · 3-4H2OOrth. 222 : P21212
9.CE.30gParakuzmenkoite-Fe(K,Ba)4Fe(Ti,Nb)8(Si4O12)4(O,OH)8 · 14H2OMon. 2/m : B2/m
9.CE.30aKorobitsynite(Na,◻)4Ti2(Si4O12)(O,OH)2 · 4H2OOrth. mmm(2/m2/m2/m) : Pbam
9.CE.30cKuzmenkoite-MnK2Mn2+(Ti,Nb)4(Si4O12)2(OH,O)4 · 5-6H2OMon. 2/m : B2/m
9.CE.30bTsepinite-KK2(Ti,Nb)2(Si4O12)(OH,O)2 · 3H2OMon. m : Bm
9.CE.30bParatsepinite-BaBa4(Ti,Nb)8(Si4O12)4(OH,O)8 · 8H2OMon. 2/m : B2/m
9.CE.30hNeskevaaraite-FeK3Na2Fe2+(Ti,Nb)4(Si4O12)2(O,OH)4 · 5-6 H2OMon. m : Bm
9.CE.30cGjerdingenite-CaK2Ca(Nb,Ti)4(Si4O12)2(O,OH)4 · 6H2OMon. 2/m : B2/m
9.CE.30bTsepinite-Ca(Ca,K,Na)2-x(Ti,Nb)2(Si4O12)(OH,O)2 · 4H2OMon. 2/m : B2/m
9.CE.45'Natrokomarovite'(Na,Ca,H)2Nb2Si2O10(OH,F)2 · H2OOrth.
9.CE.45Komarovite(Ca,Mn)(Nb,Ti)2[Si2O7](O,F)3 · 3.5H2OOrth. mmm(2/m2/m2/m) : Cmmm

Other InformationHide

Thermal Behaviour:
Fusible with difficulty to a brownish-black glass. The borax bead is transparent wine-yellow in the oxidizing flame and violet in the reducing flame.
Notes:
Easily dissolved by sulfuric acid, with difficulty in HNO3 and HCl.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for NenadkevichiteHide

References for NenadkevichiteHide

Reference List:
Kuz'menko, M.V., Kazakova, M.E. (1955) Nenadkevichite, a new mineral. Doklady Akademii Nauk SSSR: 100: 1159-1160 (in Russian).
(1955) New mineral names; New data. American Mineralogist, 40 (11-12) 1154-1156
Vlasov, K.A., editor (1966) Mineralogy of rare elements, volume II: 547-549.
Semenov, E.I., Kazakova, M.E., Aleksandrova, R.A. (1967) The Lovozero minerals - nenadkevichite, gerassimovskite and tundrite - from IlĂ­maussaq, South Greenland. Meddelelser om GrĂžnland: 181: 3-11.
Perrault, G.; Boucher, C.; Vicat, J.; Cannillo, E.; Rossi, G. (1973) Structure cristalline du nenadkevichite (Na,K)2−x(Nb,Ti)(O,OH)Si2O6.2H2O. Acta Crystallographica Section B Structural Crystallography and Crystal Chemistry, 29 (7). 1432-1438 doi:10.1107/s0567740873004681
Mandarino, J. A., Anderson, V. (1989) Monteregian Treasures - The Minerals of Mont Saint-Hilaire, Quebec. Cambridge University Press. 281pp.p.155
Rastsvetaeva, Ramiza K.; Tamazyan, Rafael A.; Pushcharovsky, Dmitriy Yu.; Nadezhina, Tamara N. (1994) Crystal structure and microtwinning of K-rich nenadkevichite. European Journal of Mineralogy, 6 (4). 503-509 doi:10.1127/ejm/6/4/0503
Rastsvetaeva, R.K., Chukanov, N.V., Pekov, I.V. (1997) Crystal structure of a new mineral - titanium analog of orthorhombic nenadkevichite. Doklady Akademii Nauk: 357: 364-367.
Jambor, J.L. and Roberts, A.C. (1999) New mineral names. American Mineralogist: 84: 193-198.
Chukanov, N.V., Pekov, I.V., Rastsvetaeva, R.K., Nekrasov, A.N. (1999) Labuntsovite: solid solutions and features of the crystal structure. The Canadian Mineralogist: 37: 901-910.
(2001) Nenadkevichite. Handbook of Mineralogy. Mineralogical Society of America
Rastsvetaeva, R. K., Chukanov, N. V. (2002) X-ray diffraction and IR spectroscopy study of labuntsovite-group minerals. Crystallography Reports, 47 (6) 939-945 doi:10.1134/1.1523537
Chukanov, Nikita V., Pekov, Igor V., Khomyakov, Alexander P. (2002) Recommended nomenclature for labuntsovite-group minerals. European Journal of Mineralogy, 14 (1) 165-173 doi:10.1127/0935-1221/2002/0014-0165

Localities for NenadkevichiteHide

Showing 26 localities.

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

Image - This locality has map coordinates listed. Image - This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. Image - Good crystals or important locality for species. Image - 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 (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Brazil
 
  • Minas Gerais
    • AraxĂĄ
Traversa et al. (2001)
Canada
 
  • QuĂ©bec
    • MontĂ©rĂ©gie
      • La VallĂ©e-du-Richelieu RCM
        • Mont Saint-Hilaire
Grice (1989) +1 other reference
      • Lajemmerais RCM
        • Varennes & St-Amable
HorvĂĄth et al. (1998)
HorvĂĄth et al. (1998)
China
 
  • Liaoning
    • Dandong
      • Kuandian County
- (1978)
Greenland
 
  • Kujalleq
SĂžrensen (2001) +1 other reference
Namibia
 
  • Khomas Region
    • Windhoek Rural
      • Aris
Uwe Kolitsch (single-crystal X-ray diffraction) +2 other references
Russia
 
  • Chelyabinsk Oblast
Belovitskaya et al. (2004)
  • Murmansk Oblast
    • Kukisvumchorr Mt
Lapis 28 (12) +2 other references
        • 252 m level
Pekov et al. (2003) +2 other references
    • Lovozersky District
Pekov (1998)
        • Umbozero mine
Pekov (2000)
Arzamastsev et al. (2008)
Kuz'menko et al. (1955) +2 other references
Pluth et al. (1997)
[World of Stones 95:5-6
maurice.strahlen.org (2003)
    • Northern Karelia
      • Vuoriyarvi alkaline-ultrabasic massif
Lapis 28 (12)
Pekov (1998)
Spain
 
  • Canary Islands
    • Santa Cruz de Tenerife Province
      • Tenerife
Dill et al. (2023)
        • Arona
Dill et al. (2023)
Dill et al. (2023)
USA
 
  • Arkansas
    • Hot Spring County
      • Magnet Cove
Henry Barwood - unpublished (2010)
  • Virginia
Dietrich (1990)
      • West Augusta
Robin D. Tibbit (deceased)
Dietrich (1990)
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