Mineralogy Database

Trilithionite Mineral Data

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General Trilithionite Information

Help on Chemical  Formula: Chemical Formula: KLi1.5Al1.5AlSi3O10F2
Help on Composition: Composition: Molecular Weight = 399.21 gm
   Potassium   9.79 %  K    11.80 % K2O
   Lithium     2.61 %  Li    5.61 % Li2O
   Aluminum   16.90 %  Al   31.93 % Al2O3
   Silicon    21.11 %  Si   45.15 % SiO2
   Oxygen     40.08 %  O
   Fluorine    9.52 %  F     9.52 % F
                -   %   F    -4.01 % -O=F2    
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: KLi1.5Al2.5Si3O10F2
Help on Environment: Environment: Intermediate composition near polylithionite. Non-end member species.
Help on IMA Status: IMA Status: Approved IMA 1960 (Dana # Added)
Help on Locality: Locality: Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the high concentration of lithium.
Help on Name Pronunciation: Name Pronunciation: Trilithionite + Pronunciation Say TRILITHIONITE
 

Trilithionite Image

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  Trilithionite

Comments: Pinkish trilithionite in matrix.
Location: Neuland Quarry, Döbschütz, Königshain, Oberlausitz, Saxony, Germany. Scale: Picture size 1.2 mm.
© Thomas Witzke / Abraxas-Verlag

Trilithionite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.7361:1:3.8884
Help on Cell Dimensions: Cell Dimensions: a = 9.056, b = 5.216, c = 20.282, Z = 4; beta = 99.64° V = 944.51 Den(Calc)= 2.81
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/m
 

Physical Properties of Trilithionite

Help on Cleavage: Cleavage: {001} Perfect
Help on Color: Color: White.
Help on Diaphaneity: Diaphaneity: Translucent
Help on Fracture: Fracture: Elastic - Fragments which spring back after bending.
Help on Habit: Habit: Micaceous - Platy texture with "flexible" plates.
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Trilithionite

Help on Optical Data: Optical Data: NCalc= 1.58 - from Gladstone-Dale relationship (KC = 0.2048) where Ncalc=Dcalc*KC+1
 

Calculated Properties of Trilithionite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.76 gm/cc
note: Specific Gravity of Trilithionite =2.81 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PETrilithionite = 2.36 barns/electron
U=PETrilithionite x relectron= 6.51 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 138.78 (Gamma Ray American Petroleum Institute Units)
Concentration of Trilithionite per GRapi unit = 0.72 (%)

Estimated Radioactivity from Trilithionite - barely detectable

 

Trilithionite Classification

Help on  Dana Class: Dana Class: 71.02.02b.08a (71)Phyllosilicate Sheets of Six-Membered Rings
  (71.02)with 2:1 Layers
  (71.02.02b)Mica Group (Biotite subgroup)
 
71.02.02b.01 Phlogopite KMg3(Si3Al)O10(F,OH)2 C 2/m 2/m
 
71.02.02b.01a Tetraferriphlogopite! KMg3FeSi3O10(OH)2 2/m
 
71.02.02b.01b Shirozulite! KMn3(AlSi3)O10(OH,F)2 C 2/m 2/m
 
71.02.02b.01c Fluorophlogopite! KMg3(AlSi3)O10F2 C 2/m 2/m
 
71.02.02b.02 Biotite* K(Mg,Fe)3[AlSi3O10(OH,F)2 C 2/m 2/m
 
71.02.02b.03 Annite KFe3AlSi3O10(OH,F)2 C 2/m 2/m
 
71.02.02b.03a Fluorannite! KFe3AlSi3O10F2 C 2/m 2/m
 
71.02.02b.04 Tetraferriannite K(Fe,Mg)3(Fe,Al)Si3O10(OH)2 C 2/m 2/m
 
71.02.02b.05 Siderophyllite KFe2Al(Al2Si2)O10(F,OH)2 C 2/m 2/m
 
71.02.02b.05a Eastonite! KMg2Al[Al2Si2O10](OH)2 2/m
 
71.02.02b.06 Hendricksite K(Zn,Mg,Mn)3Si3AlO10(OH)2 C 2/m 2/m
 
71.02.02b.07 Lepidolite K(Li,Al)3(Si,Al)4O10(F,OH)2 C 2/m,Cm Mono
 
71.02.02b.08 Polylithionite KLi2AlSi4O10(F,OH)2 C 2/m 2/m
 
71.02.02b.08a Trilithionite! KLi1.5Al1.5AlSi3O10F2 C 2/m 2/m
 
71.02.02b.08b Sokolovaite! CsLi2AlSi4O10F2 C 2/m, C 2 or Cm Mono
 
71.02.02b.09 Tainiolite KLiMg2Si4O10F2 C 2/m 2/m
 
71.02.02b.10 Zinnwaldite KLiFeAl(AlSi3)O10(F,OH)2 C 2/m 2/m
 
71.02.02b.11 Norrishite K(Mn2Li)Si4O10(O)2 C 2/m 2/m
 
71.02.02b.12 Masutomilite K(Li,Al,Mn)3[(Si,Al)4O10](F,OH)2 C 2/m 2/m
 
71.02.02b.13 Aspidolite NaMg3AlSi3O10(OH)2 C 2/m 2/m
 
71.02.02b.14 Wonesite (Na,K).5(Mg,Fe,Al)3(Si,Al)4O10(OH,F)2 C 2/m 2/m
 
71.02.02b.15 Preiswerkite NaMg2Al3Si2O10(OH)2 C 2/m 2/m
 
71.02.02b.16 Ephesite NaLiAl2(Al2Si2)O10(OH)2 C 2/c 2/m
 
71.02.02b.18 Suhailite! (NH4)Fe3(Si3Al)O10(OH)2 C 2/m? 2/m
Help on  Strunz Class: Strunz Class: 09.EC.20 09 - SILICATES (Germanates)
  09.E - Phyllosilicates
  09.EC -Phyllosilicates with mica sheets, composed of tetrahedral and octahedral nets
 
09.EC.20 Annite KFe3AlSi3O10(OH,F)2 C 2/m 2/m
 
09.EC.20 Biotite* K(Mg,Fe)3[AlSi3O10(OH,F)2 C 2/m 2/m
 
09.EC.20 Hendricksite K(Zn,Mg,Mn)3Si3AlO10(OH)2 C 2/m 2/m
 
09.EC.20 Ephesite NaLiAl2(Al2Si2)O10(OH)2 C 2/c 2/m
 
09.EC.20 Aspidolite NaMg3AlSi3O10(OH)2 C 2/m 2/m
 
09.EC.20 Lepidolite K(Li,Al)3(Si,Al)4O10(F,OH)2 C 2/m,Cm Mono
 
09.EC.20 Preiswerkite NaMg2Al3Si2O10(OH)2 C 2/m 2/m
 
09.EC.20 Masutomilite K(Li,Al,Mn)3[(Si,Al)4O10](F,OH)2 C 2/m 2/m
 
09.EC.20 Wonesite (Na,K).5(Mg,Fe,Al)3(Si,Al)4O10(OH,F)2 C 2/m 2/m
 
09.EC.20 Polylithionite KLi2AlSi4O10(F,OH)2 C 2/m 2/m
 
09.EC.20 Phlogopite KMg3(Si3Al)O10(F,OH)2 C 2/m 2/m
 
09.EC.20 Norrishite K(Mn2Li)Si4O10(O)2 C 2/m 2/m
 
09.EC.20 Siderophyllite KFe2Al(Al2Si2)O10(F,OH)2 C 2/m 2/m
 
09.EC.20 Fluorannite! KFe3AlSi3O10F2 C 2/m 2/m
 
09.EC.20 Shirokshinite! K(NaMg2)Si4O10F2 C 2/m 2/m
 
09.EC.20 Zinnwaldite KLiFeAl(AlSi3)O10(F,OH)2 C 2/m 2/m
 
09.EC.20 Eastonite! KMg2Al[Al2Si2O10](OH)2 2/m
 
09.EC.20 Tetraferriannite K(Fe,Mg)3(Fe,Al)Si3O10(OH)2 C 2/m 2/m
 
09.EC.20 Tetraferriphlogopite! KMg3FeSi3O10(OH)2 2/m
 
09.EC.20 Trilithionite! KLi1.5Al1.5AlSi3O10F2 C 2/m 2/m
 
09.EC.20 Sokolovaite! CsLi2AlSi4O10F2 C 2/m, C 2 or Cm Mono
 
09.EC.20 Shirozulite! KMn3(AlSi3)O10(OH,F)2 C 2/m 2/m
 
09.EC.20 Suhailite! (NH4)Fe3(Si3Al)O10(OH)2 C 2/m? 2/m
 
09.EC.20 Fluorophlogopite! KMg3(AlSi3)O10F2 C 2/m 2/m
 

Other Trilithionite Information

Help on References: References: PHYS. PROP.(RRUFF ID R040101)
Help on See Also: See Also: Links to other databases for Trilithionite :
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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Trilithionite

KLi1.5Al1.5AlSi3O10F2
Dana No: 71.02.02b.08a Strunz No: 09.EC.20
Locality:

 

Notes:

 

 
   
 


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