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Lepkhenelmite-Zn

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08164480014947236801652.jpg
Lepkhenelmite-Zn

Lepkhe-Nel'm Mt, Seidozero Lake, Lovozersky District, Murmansk Oblast, Russia
08164480014947236801652.jpg
Lepkhenelmite-Zn

Lepkhe-Nel'm Mt, Seidozero Lake, Lovozersky District, Murmansk Oblast, Russia
08164480014947236801652.jpg
Lepkhenelmite-Zn

Lepkhe-Nel'm Mt, Seidozero Lake, Lovozersky District, Murmansk Oblast, Russia
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About Lepkhenelmite-ZnHide

Formula:
(Ba,K)2Zn(Ti,Nb)4(Si4O12)2(O,OH)4 · 7H2O
Colour:
pale brown
Lustre:
Vitreous
Hardness:
5
Specific Gravity:
2.96
Crystal System:
Monoclinic
Name:
For the type locality and zinc being the prevalent element occupying the D sites.
The barium analogue of Kuzmenkoite-Zn.


Classification of Lepkhenelmite-ZnHide

IMA status:
Approved
Approval Year:
2003
Strunz 8th ed.:
8/E.07-220
Nickel-Strunz 10th (pending) ed.:
9.CE.30c

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

Physical Properties of Lepkhenelmite-ZnHide

Lustre:
Vitreous
Transparency:
Transparent, Translucent
Colour:
pale brown
Streak:
white
Hardness:
5 on Mohs scale
Tenacity:
Brittle
Cleavage:
None Observed
Density:
2.96 g/cm3 (Measured)    

Optical Data of Lepkhenelmite-ZnHide

Type:
Biaxial
RI values:
nα = 1.683 nβ = 1.692 nγ = 1.795
2V:
Measured: 25°
Max Birefringence:
δ = 0.112
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
High

Chemical Properties of Lepkhenelmite-ZnHide

Formula:
(Ba,K)2Zn(Ti,Nb)4(Si4O12)2(O,OH)4 · 7H2O
IMA Formula:
Ba2Zn(Ti,Nb)4(Si4O12)2(O,OH)4 · 7H2O
Elements listed:
Ba, H, Nb, O, Si, Ti, Zn - search for minerals with similar chemistry
Common Impurities:
Al,Ca,Fe,K,Mg,Mn,Na,Sr

Crystallography of Lepkhenelmite-ZnHide

Crystal System:
Monoclinic
Class (H-M):
m - Domatic
Space Group:
Bm
Cell Parameters:
a = 14.38 Å, b = 13.89 Å, c = 7.793 Å
β = 117.52°
Ratio:
a:b:c = 1.035 : 1 : 0.561
Unit Cell V:
1380.4 ų
Z:
2

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
3.194 Å(100)
6.95 Å(37)
3.101 Å(22)
6.39 Å(10)
3.050 Å(8)

Type Occurrence of Lepkhenelmite-ZnHide

Type Locality:
ⓘ Pegmatite No. 45, Lepkhe-Nel'm Mt (Lepkhe-Nelm; Nepkha), Seidozero Lake, Lovozersky District, Murmansk Oblast, Russia
General Appearance of Type Material:
coarse flattened-prismatic crystals up to 7 x 2.5 x 0.5 mm and crystal clusters up to 1 x 0.5 cm
Geological Setting of Type Material:
a hydrothermally formed mineral, occurring in cavities of an eudialyte-aegirine-feldspar pegmatite
Associated Minerals at Type Locality:
VinogradoviteTsepinite-NaRanciéiteNatroliteLamprophyllite
Kuzmenkoite-MnHalloysiteEudialyteApatiteAlsakharovite-Zn
Aegirine

Synonyms of Lepkhenelmite-ZnHide

Other Language Names for Lepkhenelmite-ZnHide

Simplified Chinese:水硅铌钛锌钡石
Traditional Chinese:水矽鈮鈦鋅鋇石

Relationship of Lepkhenelmite-Zn to other SpeciesHide

Member of:
Kuzmenkoite Group > Labuntsovite Supergroup
Other Members of this group:
Burovaite-Ca(Na,K)4Ca2(Ti,Nb)8(Si4O12)4(OH,O)8 · 12H2OMon. 2/m : B2/m
Gjerdingenite-CaK2Ca(Nb,Ti)4(Si4O12)2(O,OH)4 · 6H2OMon. 2/m : B2/m
Gjerdingenite-FeK2Fe2+(Nb,Ti)4(Si4O12)2(O,OH)4 · 6H2OMon. 2/m : B2/m
Gjerdingenite-MnK2Mn2+(Nb,Ti)4(Si4O12)2(O,OH)4 · 6H2OMon. 2/m : B2/m
Gjerdingenite-NaK2Na(Nb,Ti)4(Si4O12)2(OH,O)4 · 5H2OMon. 2/m : B2/m
Karupmøllerite-Ca(Na,Ca,K)2Ca(Nb,Ti)4(Si4O12)2(O,OH)4 · 7H2O
Kuzmenkoite-MnK2Mn2+(Ti,Nb)4(Si4O12)2(OH,O)4 · 5-6H2OMon.
Kuzmenkoite-ZnK2Zn(Ti,Nb)4(Si4O12)2(OH,O)4·6-8H2OMon. m : Bm

Related Minerals - Nickel-Strunz GroupingHide

9.CE.05PapagoiteCaCu[H3AlSi2O9]Mon.
9.CE.10VerplanckiteBa2(Mn,Fe,Ti)Si2O6(O,OH,Cl,F)2 · 3H2O or nearHex.
9.CE.15BaotiteBa4Ti8Si4O28ClTet. 4/m : I41/a
9.CE.20NagashimaliteBa4(V,Ti)4B2Si8O27(O,OH)2ClOrth. mmm (2/m 2/m 2/m) : Pmmn
9.CE.20TaramelliteBa4(Fe3+,Ti,Fe2+,Mg)4(B2Si8O27)O2ClxOrth. mmm (2/m 2/m 2/m) : Pmmn
9.CE.20TitantaramelliteBa4(Ti,Fe3+,Fe2+,Mg)4(B2Si8O27)O2ClxOrth.
9.CE.25Bario-orthojoaquinite(Ba,Sr)4Fe2Ti2[Si4O12]2O2 · H2OOrth.
9.CE.25Byelorussite-(Ce)NaBa2Ce2MnTi2[Si4O12]2O2(F,OH) · H2O
9.CE.25Joaquinite-(Ce)NaBa2Ce2FeTi2[Si4O12]2O2(OH,F) · H2OMon. 2 : B2
9.CE.25Orthojoaquinite-(Ce)NaBa2Ce2FeTi2[Si4O12]2O2(O,OH) · H2O
9.CE.25StrontiojoaquiniteSr2Ba2(Na,Fe)2Ti2[Si4O12]2O2(O,OH)2 · H2OMon.
9.CE.25Strontio-orthojoaquinite(Na,Fe)2Sr2Ba2Ti2[Si4O12]2O2(O,OH)2 · H2OOrth.
9.CE.25Orthojoaquinite-(La)NaBa2La2Fe2+Ti2[Si4O12]2O2(O,OH) · H2OOrth.
9.CE.30eLabuntsovite-MnNa4K4(Ba,K)2Mn2+(Ti,Nb)8(Si4O12)4(O,OH)8 · 10-12H2OMon.
9.CE.30aNenadkevichite(Na,◻)8Nb4(Si4O12)2(O,OH)4 · 8H2OOrth. mmm (2/m 2/m 2/m) : Pbam
9.CE.30dLemmleinite-KK2(Ti,Nb)2(Si4O12)(OH,O)2 · 4H2OOrth.
9.CE.30aKorobitsyniteNa2(Ti,Nb)2(Si4O12)(OH,O)2 · 3-4H2OOrth. mmm (2/m 2/m 2/m) : Pbam
9.CE.30cKuzmenkoite-MnK2Mn2+(Ti,Nb)4(Si4O12)2(OH,O)4 · 5-6H2OMon.
9.CE.30bVuoriyarvite-KK2(Nb,Ti)2(Si4O12)(O,OH)2 · 4H2OMon.
9.CE.30bTsepinite-NaNa2(Ti,Nb)2(Si4O12)(OH,O)2 · 3H2OMon.
9.CE.30cKarupmøllerite-Ca(Na,Ca,K)2Ca(Nb,Ti)4(Si4O12)2(O,OH)4 · 7H2O
9.CE.30eLabuntsovite-MgNa4K4(Ba,K)2Mg(Ti,Nb)8(Si4O12)4(O,OH)8 · 10H2OMon.
9.CE.30eLabuntsovite-FeNa4K4(Ba,K)2Fe2+(Ti,Nb)8(Si4O12)4(O,OH)8 · 10H2OMon.
9.CE.30dLemmleinite-BaNa2K2Ba(Ti,Nb)4(Si4O12)2(O,OH)4 · 5H2OMon. 2/m : B2/m
9.CE.30cGjerdingenite-FeK2Fe2+(Nb,Ti)4(Si4O12)2(O,OH)4 · 6H2OMon. 2/m : B2/m
9.CE.30hNeskevaaraite-FeK3Na2Fe2+(Ti,Nb)4(Si4O12)2(O,OH)4 · 5-6 H2OMon. m : Bm
9.CE.30bTsepinite-KK2(Ti,Nb)2(Si4O12)(OH,O)2 · 3H2OMon. 2/m : B2/m
9.CE.30bParatsepinite-BaBa4(Ti,Nb)8(Si4O12)4(OH,O)8 · 8H2O
9.CE.30bTsepinite-CaCa(Ti,Nb)2(Si4O12)(OH,O)2 · 3H2OMon. 2/m : B2/m
9.CE.30hAlsakharovite-ZnNaSrKZn(Ti,Nb)4(Si4O12)2(O,OH)4 · 7H2OMon. m : Bm
9.CE.30cGjerdingenite-MnK2Mn2+(Nb,Ti)4(Si4O12)2(O,OH)4 · 6H2OMon. 2/m : B2/m
9.CE.30bTsepinite-SrSr(Ti,Nb)2(Si4O12)(OH,O)2 · 3H2OMon. m : Bm
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.30fParalabuntsovite-MgNa8K8Mg4Ti16(Si4O12)8(OH,O)16 · 20-24H2OMon. 2/m
9.CE.30cGjerdingenite-CaK2Ca(Nb,Ti)4(Si4O12)2(O,OH)4 · 6H2OMon. 2/m : B2/m
9.CE.30cGjerdingenite-NaK2Na(Nb,Ti)4(Si4O12)2(OH,O)4 · 5H2OMon. 2/m : B2/m
9.CE.30hGutkovaite-MnK2CaMn(Ti,Nb)4(Si4O12)2(O,OH)4 · 5H2OMon.
9.CE.30cKuzmenkoite-ZnK2Zn(Ti,Nb)4(Si4O12)2(OH,O)4·6-8H2OMon. m : Bm
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 · 6H2O
9.CE.30gParakuzmenkoite-Fe(K,Ba)4Fe(Ti,Nb)8(Si4O12)4(O,OH)8 · 14H2OMon. 2/m : B2/m
9.CE.30cBurovaite-Ca(Na,K)4Ca2(Ti,Nb)8(Si4O12)4(OH,O)8 · 12H2OMon. 2/m : B2/m
9.CE.45Komarovite(Ca,Mn)(Nb,Ti)2[Si2O7](O,F)3 · 3.5H2OOrth.
9.CE.45Natrokomarovite(Na,Ca,H)2Nb2Si2O10(OH,F)2 · H2OOrth.

Fluorescence of Lepkhenelmite-ZnHide

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 Lepkhenelmite-ZnHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Pekov, I.V., N.V. Chukanov, G.V. Shilov, N.N. Kononkova, A.E. Zadov (2004): "Lepkhenelmite-Zn, Ba2Zn(Ti,Nb)4[Si4O12]2(O,OH)4 • 7H2O, a new mineral of the labuntsovite group and its crystal structure", Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva (Proceedings of the Russian Mineralogical Society): 133(1): 49-59.

Internet Links for Lepkhenelmite-ZnHide

Localities for Lepkhenelmite-ZnHide

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
    • Lovozersky District
      • Seidozero Lake
        • Lepkhe-Nel'm Mt (Lepkhe-Nelm; Nepkha)
I.V. Pekov et al.: Zap. Vses. Mineral. Obshch. 133(1):49-59 (2004)
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