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Eliseevite

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09006580015031061506892.jpg
Nikolai A. Eliseev
Formula:
LiNa1.5Ti2(H1.5Si4O12)O2 · 2H2O
Colour:
pale creamy to colorless
Lustre:
Vitreous
Hardness:
5
Specific Gravity:
2.68
Crystal System:
Monoclinic
Name:
In honor of Nikolai Aleksandrovich Eliseev (Dec 7 1897– June 24 1966), a remarkable Russian geologist and petrologist, Professor at Leningrad State University, in recognition of his contributions to the geology and petrology of metamorphic and alkaline complexes.
Closely related to lintisite and punkaruaivite.


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Classification of EliseeviteHide

Approved
Approval Year:
2010
9.DB.17

9 : SILICATES (Germanates)
D : Inosilicates
B : Inosilicates with 2-periodic single chains, Si2O6; Pyroxene-related minerals
65.1.1.2

65 : INOSILICATES Single-Width,Unbranched Chains,(W=1)
1 : Single-Width Unbranched Chains, W=1 with chains P=2

Physical Properties of EliseeviteHide

Vitreous
Transparency:
Transparent
Colour:
pale creamy to colorless
Streak:
white
Hardness:
Tenacity:
Brittle
Cleavage:
Perfect
{100}
Fracture:
Splintery
Density:
2.68(4) g/cm3 (Measured)    2.706 g/cm3 (Calculated)

Optical Data of EliseeviteHide

Type:
Biaxial (-)
RI values:
nα = 1.665(2) nβ = 1.712(2) nγ = 1.762(5)
2V:
Measured: 85° (5), Calculated: 89.3°
Max Birefringence:
δ = 0.097
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
medium, r < v.

Chemical Properties of EliseeviteHide

Formula:
LiNa1.5Ti2(H1.5Si4O12)O2 · 2H2O
IMA Formula:
Na1.5Li{Ti2O2[Si4O10.5(OH)1.5]} · 2H2O

Crystallography of EliseeviteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/b
Setting:
C2/c
Cell Parameters:
a = 27.48(1) Å, b = 8.669(4) Å, c = 5.246(2) Å
β = 90.782(8)°
Ratio:
a:b:c = 3.17 : 1 : 0.605
Unit Cell V:
1,249.61 ų (Calculated from Unit Cell)
Z:
4

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
13.76 Å(100)
6.296 Å(60)
4.642 Å(40)
4.334 Å(40)
3.577 Å(80)
3.005 Å(70)
2.881 Å(70)
2.710 Å(50)

Type Occurrence of EliseeviteHide

General Appearance of Type Material:
long-prismatic to fibrous crystals (up to 2 mm long) growing in voids of natrolitized sodalite
Place of Conservation of Type Material:
Type material is deposited in the collections of the Mineralogical Museum of St Petersburg State University, Russia, and the Geological and the Mineralogical Museum of the Geological Institute of the Kola Science Centre, Apatity,
Russia, catalogue number
Geological Setting of Type Material:
hydrothermally altered ussingite pegmatites within the layered complex of malignites, foyaites, and foidolites with lenses of poikilitic nepheline syenites. Formed as a result of alteration of murmanite.
Associated Minerals at Type Locality:

Synonyms of EliseeviteHide

Related Minerals - Nickel-Strunz GroupingHide

9.DB.05BalipholiteBaLiMg2Al3(Si2O6)2(OH)4Orth.
9.DB.05CarpholiteMn2+Al2(Si2O6)(OH)4Orth.
9.DB.05Ferrocarpholite(Fe2+,Mg)Al2(Si2O6)(OH)4Orth. mmm (2/m 2/m 2/m) : Ccca
9.DB.05Magnesiocarpholite(Mg,Fe2+)Al2(Si2O6)(OH)4Orth.
9.DB.05Potassiccarpholite(K,☐)(Li,Mn2+)2Al4(Si2O6)2(OH,F)8Orth. mmm (2/m 2/m 2/m) : Ccca
9.DB.05VanadiocarpholiteMn2+V3+Al(Si2O6)(OH)4Orth. mmm (2/m 2/m 2/m) : Ccca
9.DB.10LorenzeniteNa2Ti2(Si2O6)O3Orth. mmm (2/m 2/m 2/m) : Pbcn
9.DB.15LintisiteLiNa3Ti2(Si2O6)2O2 · 2H2OMon.
9.DB.15PunkaruaiviteLiTi2(HSi4O12)(OH)2 · H2OMon. 2/m : B2/b
9.DB.20KukisvumiteNa6ZnTi4(Si8O24)O4 · 4H2OOrth.
9.DB.20ManganokukisvumiteNa6MnTi4(Si8O24)O4 · 4H2OOrth. mmm (2/m 2/m 2/m) : Pccn
9.DB.25VinogradoviteNa4Ti4(Si2O6)2[(Si,Al)4O10]O4 · (H2O,Na,K)3Mon. 2/m : B2/b
9.DB.25ParavinogradoviteNa1-2(Ti,Fe3+)4(Si2O6)2(AlSi3O10)(OH)4 · H2OTric. 1 : P1
9.DB.30NchwaningiteMn2+2(SiO3)(OH)2 · H2OOrth.
9.DB.35PlancheiteCu8(Si8O22)(OH)4 · H2OOrth. mmm (2/m 2/m 2/m)
9.DB.40ShattuckiteCu5(Si2O6)2(OH)2Orth. mmm (2/m 2/m 2/m)
9.DB.40UM2005-31-SiO:CuHCu11(SiO4)(OH)18 · 9H2O ?
9.DB.45Aerinite(Ca5.1Na0.5)(Fe3+,Al,Fe2+,Mg)4(Al,Mg)6[HSi12O36(OH)12][(CO3)1.2(H2O)12]Mon.
9.DB.50CapranicaiteKCaNaAl4B4Si2O18Mon. 2/m : P21/m

Related Minerals - Dana Grouping (8th Ed.)Hide

65.1.1.1ClinoenstatiteMgSiO3Mon. 2/m : P21/b
65.1.1.2ClinoferrosiliteFe2+SiO3Mon. 2/m : P21/b
65.1.1.3KanoiteMn2+(Mg,Mn2+)Si2O6Mon. 2/m : P21/b
65.1.1.4Pigeonite(CaxMgyFez)(Mgy1Fez1)Si2O6Mon. 2/m : P21/b

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 EliseeviteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Yakovenchuk, V.N., Ivanyuk, G.Y., Krivovichev, S.V., Pakhomovsky, Y.A., Selivanova, E.A., Korchak, J.A., Men’shikov, Y.P. and Drogobuzhskaya, S.V. (2010) Eliseevite, IMA 2010-031. CNMNC Newsletter, October 2010, page 900; Mineralogical Magazine: 74: 899-902.
Yakovenchuk, V.N., Ivanyuk, G.Y., Krivovichev, S.V., Pakhomovsky, Y.A., Selivanova, E.A., Korchak, J.A., Men'shikov, Y.P., Drogobuzhskaya, S.V., Zalkind, O.A. (2011) Eliseevite, Na1.5Li[Ti2Si4O12.5(OH)1.5]∙ 2H2O, a new microporous titanosilicate from the Lovozero alkaline massif (Kola Peninsula, Russia). American Mineralogist: 96(10): 1624-1629.

Internet Links for EliseeviteHide

Localities for EliseeviteHide

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
Yakovenchuk, V. N., Ivanyuk, G. Y., Krivovichev, S. V., Pakhomovsky, Y. A., Selivanova, E. A., Korchak, J. A., ... & Zalkind, O. A. (2011). Eliseevite, Na1. 5Li [Ti2Si4O12. 5 (OH) 1.5]∙ 2H2O, a new microporous titanosilicate from the Lovozero alkaline massif (Kola Peninsula, Russia). American Mineralogist, 96(10), 1624-1629.
Yakovenchuk, V. N., Ivanyuk, G. Y., Krivovichev, S. V., Pakhomovsky, Y. A., Selivanova, E. A., Korchak, J. A., ... & Zalkind, O. A. (2011). Eliseevite, Na1. 5Li [Ti2Si4O12. 5 (OH) 1.5]∙ 2H2O, a new microporous titanosilicate from the Lovozero alkaline massif (Kola Peninsula, Russia). American Mineralogist, 96(10), 1624-1629.
 
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