Punkaruaivite Mineral Data

General Punkaruaivite Information

Chemical Formula:

Li{Ti2(OH)2[Si4O11(OH)]}•H2O

Composition:

Molecular Weight = 460.07 gm

Lithium 1.51 % Li 3.25 % Li₂O

Titanium 20.81 % Ti 34.72 % TiO₂

Silicon 24.42 % Si 52.24 % SiO₂

Hydrogen 1.10 % H 9.79 % H₂O

Oxygen 52.16 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

LiTi₂(OH)₂Si₄O₁₁(OH)•(H₂O)

Environment:

Related to lintisite and kukisvumite. Na-free analog of lintisite.

IMA Status:

Proposed IMA 2008 (Dana # Added)

Locality:

Mt. Punkaruaiv, Lovozero massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Synonym:

IMA2008-018

Punkaruaivite Crystallography

Axial Ratios:

a:b:c =3.0491:1:0.5988

Cell Dimensions:

a = 26.68, b = 8.75, c = 5.24, Z = 4; beta = 91.2° V = 1,223.01 Den(Calc)= 2.50

Crystal System:

Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/c

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 13.3(1), 3.5(0.8), 6.23(0.8),2.81(0.7), 3.01(0.7), 4.38(0.6), 2.7(0.4), 4.16(0.4),

Optical Properties of Punkaruaivite

Optical Data:

NCalc= 1.72 - from Gladstone-Dale relationship (KC = 0.2884) where Ncalc=Dcalc*KC+1

Calculated Properties of Punkaruaivite

Electron Density:

Bulk Density (Electron Density)=2.48 gm/cc
note: Specific Gravity of Punkaruaivite =2.50 gm/cc.

Fermion Index:

Fermion Index = 0.03
Boson Index = 0.97

Photoelectric:

PE_{Punkaruaivite}= 4.34 barns/electron
U=PE_{Punkaruaivite} x rElectron Density= 10.75 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Punkaruaivite is Not Radioactive

Punkaruaivite Classification

Dana Class:

65.01.06.05 (65)Inosilicate Single-Width Unbranched Chains, W=1

(65.01)with chains P=2

(65.01.06)Lorenzenite group

65.01.06.01 Lorenzenite Na2Ti2Si2O9 P bcn 2/m 2/m 2/m

65.01.06.02 Kukisvumite Na6ZnTi4Si8O28•4(H2O) Pccn 2/m 2/m 2/m

65.01.06.03 Lintisite Na3LiTi2Si4O14•2(H2O) C 2/c 2/m

65.01.06.04 Manganokukisvumite! Na6MnTi4Si8O28•4(H2O) Pccn 2/m 2/m 2/m

65.01.06.05 Punkaruaivite! Li{Ti2(OH)2[Si4O11(OH)]}•H2O C 2/c 2/m

Strunz Class:

09.DX.00 09 - SILICATES (Germanates)

09.D - Unclassified Strunz Inosilicates

09.DX -Unknown

09.DX.00 Hypersthene? (Mg,Fe)2Si2O6 2/m 2/m 2/m

09.DX.00 Plumalsite* Pb4Al2(SiO3)7(?) Unk Ortho

09.DX.00 IMA2008-070 NaLi2(Fe2Al2Li)(Si6Al2)O22F2 C 2/m 2/m

09.DX.00 IMA2007-015 K(CaNa)(Fe3Al2)(Si6Al2)O22(OH)2 C 2/m 2/m

09.DX.00 Tanohataite! LiMn2Si3O8(OH) P1 1

09.DX.00 Punkaruaivite! Li{Ti2(OH)2[Si4O11(OH)]}•H2O C 2/c 2/m

09.DX.00 Yegorovite! Na4[Si2O4(OH)2]2•7H2O P 2₁/c 2/m

09.DX.00 Kushiroite CaAl2SiO6 C 2/c 2/m

09.DX.00 Grossmanite CaTiAlSiO6 C 2/m 2/m

09.DX.00 IMA2009-009 KNa2Li(Mg,Fe)2Ti2Si8O24 C 2/m 2/m

09.DX.00 IMA2009-010 [Ba6(PO4)2(CO3)][Fe7(OH)4Fe2O2(SiO3)8] P1 1

09.DX.00 IMA2009-012 NaNa2(Mg2Al2Li)Si8O22F2 C 2/m 2/m

Other Punkaruaivite Information

See Also:

Links to other databases for Punkaruaivite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Print or Cut-and-Paste your Punkaruaivite Specimen Label here :

Punkaruaivite

Li{Ti2(OH)2[Si4O11(OH)]}•H2O
Dana No: 65.01.06.05 Strunz No: 09.DX.00
Locality:

Notes:

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