General Polylithionite Information
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Chemical Formula: |
KLi2AlSi4O10(F,OH)2 |
Composition: |
Molecular Weight = 393.12 gm |
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Potassium 9.95 % K 11.98 % K2O |
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Sodium 1.75 % Na 2.36 % Na2O |
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Lithium 3.00 % Li 6.46 % Li2O |
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Aluminum 6.86 % Al 12.97 % Al2O3 |
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Silicon 28.58 % Si 61.14 % SiO2 |
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Hydrogen 0.26 % H 2.29 % H2O |
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Oxygen 44.77 % O |
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Fluorine 4.83 % F 4.83 % F |
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- % F -2.03 % -O=F2 |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
Empirical Formula: |
KLi1.7Na0.3AlSi4O10F(OH) |
Environment: |
In syenite pegmatites in differentiated alkalic rocks. |
IMA Status: |
Valid Species (Pre-IMA) 1884 |
Locality: |
Ilimaussaq intrusion, southern Greenland. Link to MinDat.org Location Data. |
Name Origin: |
From the Greek "ploy" for many or much, and in allusion to its high LITHIum content. |
Synonym: |
ICSD 34336 (with F) |
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PDF 21952 |
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Polylithionite Image |
Images:
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Polylithionite
Comments: Rosette of polylithionite crystals.
Location: Mt. St. Hilaire, Quebec, Canada.
Scale: 2.5 x 2.3 cm.
© John Veevaert |
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Images:
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Polylithionite Crystallography
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Axial Ratios: |
a:b:c =0.5782:1:1.1183 |
Cell Dimensions: |
a = 5.186, b = 8.968, c = 10.029, Z = 2; beta = 100.4° V = 458.77 Den(Calc)= 2.85 |
Crystal System: |
Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m |
X Ray Diffraction: |
By Intensity(I/Io): 3.07(1), 3.31(1), 3.59(1), |
Crystal Structure:
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Help on Above
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Brigatti M F , Lugli C , Poppi L , Foord E E , Kile D E , American Mineralogist , 85 (2000) p.1275-1286, Crystal chemical variations in Li- and Fe-rich micas from, Pikes Peak batholith (central Colorado), Sample: 114
View Additional jPOWD Structure files for Polylithionite
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Physical Properties of Polylithionite
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Cleavage: |
[001] Perfect |
Color: |
Bluish, Colorless, Violet, Greenish, Pearl white. |
Density: |
2.58 - 2.82, Average = 2.7 |
Diaphaniety: |
Transparent |
Fracture: |
Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern. |
Habit: |
Pseudo Hexagonal - Crystals show a hexagonal outline. |
Habit: |
Scaly - Morphology like fish scales. |
Habit: |
Tabular - Form dimensions are thin in one direction. |
Hardness: |
2-3 - Gypsum-Calcite |
Luminescence: |
Fluorescent, Short UV=lemon yellow. |
Luster: |
Pearly |
Streak: |
white |
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Optical Properties of Polylithionite
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Gladstone-Dale: |
CI meas= 0.044 (Good) - where the CI = (1-KPDmeas/KC) CI calc= 0.094 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1919,KPDmeas= 0.2025,KC= 0.2119 |
Optical Data: |
Biaxial (-), a=1.53, b=1.551-1.556, g=1.555-1.559, bire=0.0250-0.0290 |
Pleochroism (x): |
colorless. |
Pleochroism (y): |
colorless. |
Pleochroism (z): |
colorless. |
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Calculated Properties of Polylithionite
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Electron Density: |
relectron=2.67 gm/cc note: rPolylithionite =2.70 gm/cc. |
Fermion Index |
Fermion Index = 0.01582 Boson Index = 0.98418 |
Photoelectric: |
PEPolylithionite = 2.37 barns/electron U=PEPolylithionite x relectron= 6.33 barns/cc. |
Radioactivity: |
GRapi = 141.95 (Gamma Ray American Petroleum Institute Units)
Estimated Radioactivity from Polylithionite - barely detectable
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Polylithionite Classification
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Dana Class: |
71.2.2b.8 (71)Phyllosilicate Sheets of Six-Membered Rings |
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(71.2)with 2:1 Layers |
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(71.2.2b)Mica Group (Biotite subgroup) |
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71.2.2b.1 Phlogopite KMg3(Si3Al)O10(F,OH)2 C 2/m 2/m |
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71.2.2b.1a Tetra-ferriphlogopite! KMg3FeSi3O10(OH)2 2/m |
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71.2.2b.1b Shirozulite! KMn3(AlSi3)O10(OH,F)2 C 2/m 2/m |
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71.2.2b.2 Biotite* K(Mg,Fe)3[AlSi3O10(OH,F)2 C 2/m 2/m |
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71.2.2b.3 Annite KFe3AlSi3O10(OH,F)2 C 2/m 2/m |
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71.2.2b.3a Fluorannite! KFe3AlSi3O10F2 C 2/m 2/m |
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71.2.2b.4 Tetra-ferri-annite K(Fe,Mg)3(Fe,Al)Si3O10(OH)2 C 2/m 2/m |
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71.2.2b.5 Siderophyllite KFe2Al(Al2Si2)O10(F,OH)2 C 2/m 2/m |
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71.2.2b.5a Eastonite! KMg2Al[Al2Si2O10](OH)2 2/m |
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71.2.2b.6 Hendricksite K(Zn,Mg,Mn)3Si3AlO10(OH)2 C 2/m 2/m |
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71.2.2b.7 Lepidolite K(Li,Al)3(Si,Al)4O10(F,OH)2 C 2/m,Cm Mono |
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71.2.2b.8 Polylithionite KLi2AlSi4O10(F,OH)2 C 2/m 2/m |
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71.2.2b.8a Trilithionite! KLi1.5Al1.5AlSi3O10F2 C 2/m 2/m |
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71.2.2b.8b Sokolovaite! CsLi2AlSi4O10F2 C 2/m, C 2 or Cm Mono |
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71.2.2b.9 Tainiolite KLiMg2Si4O10F2 C 2/m 2/m |
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71.2.2b.10 Zinnwaldite KLiFeAl(AlSi3)O10(F,OH)2 C 2/m 2/m |
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71.2.2b.11 Norrishite K(Mn2Li)Si4O10(O)2 C 2/m 2/m |
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71.2.2b.12 Masutomilite K(Li,Al,Mn)3[(Si,Al)4O10](F,OH)2 C 2/m 2/m |
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71.2.2b.13 Aspidolite NaMg3AlSi3O10(OH)2 C 2/m 2/m |
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71.2.2b.14 Wonesite (Na,K).5(Mg,Fe,Al)3(Si,Al)4O10(OH,F)2 C 2/m 2/m |
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71.2.2b.15 Preiswerkite NaMg2Al3Si2O10(OH)2 C 2/m 2/m |
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71.2.2b.16 Ephesite NaLiAl2(Al2Si2)O10(OH)2 C 2/c 2/m |
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71.2.2b.17 IMA2004-049! NaMg3(AlSi3)O10(OH)2 C 2/m 2/m |
Strunz Class: |
VIII/H.11-10 VIII - Silicates |
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VIII/H - Phyllosilicates (layered) Mica like layered silicates with [Si4O10]4- and related groups |
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VIII/H.11 - Mica group, Biotite series |
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VIII/H.11-00* Zinnwaldite KLiFeAl(AlSi3)O10(F,OH)2 C 2/m 2/m |
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VIII/H.11-10 Polylithionite KLi2AlSi4O10(F,OH)2 C 2/m 2/m |
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VIII/H.11-20 Tainiolite KLiMg2Si4O10F2 C 2/m 2/m |
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VIII/H.11-30 Norrishite K(Mn2Li)Si4O10(O)2 C 2/m 2/m |
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VIII/H.11-35 Shirokshinite! K(NaMg2)Si4O10F2 C 2/m 2/m |
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VIII/H.11-40 Montdorite (K,Na)(Fe,Mn,Mg)2.5[Si4O10](F,OH)2 C 2/c 2/m |
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VIII/H.11-50 Trilithionite! KLi1.5Al1.5AlSi3O10F2 C 2/m 2/m |
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VIII/H.11-60 Masutomilite K(Li,Al,Mn)3[(Si,Al)4O10](F,OH)2 C 2/m 2/m |
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VIII/H.11-70 Aspidolite NaMg3AlSi3O10(OH)2 C 2/m 2/m |
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VIII/H.11-80 Phlogopite KMg3(Si3Al)O10(F,OH)2 C 2/m 2/m |
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VIII/H.11-90 Tetra-ferriphlogopite! KMg3FeSi3O10(OH)2 2/m |
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VIII/H.11-100 Hendricksite K(Zn,Mg,Mn)3Si3AlO10(OH)2 C 2/m 2/m |
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VIII/H.11-102 Shirozulite! KMn3(AlSi3)O10(OH,F)2 C 2/m 2/m |
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VIII/H.11-105 Fluorannite! KFe3AlSi3O10F2 C 2/m 2/m |
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VIII/H.11-110 Annite KFe3AlSi3O10(OH,F)2 C 2/m 2/m |
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VIII/H.11-120 Tetra-ferri-annite K(Fe,Mg)3(Fe,Al)Si3O10(OH)2 C 2/m 2/m |
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VIII/H.11-130 Ephesite NaLiAl2(Al2Si2)O10(OH)2 C 2/c 2/m |
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VIII/H.11-140 Preiswerkite NaMg2Al3Si2O10(OH)2 C 2/m 2/m |
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VIII/H.11-150 Eastonite! KMg2Al[Al2Si2O10](OH)2 2/m |
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VIII/H.11-160 Siderophyllite KFe2Al(Al2Si2)O10(F,OH)2 C 2/m 2/m |
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Other Polylithionite Information
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References: |
NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic2) |
See Also: |
Links to other databases for Polylithionite :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 -Am. Min. Crystal Structure Database
4 - Amethyst Galleries' Mineral Gallery
5 -Athena
6 - Crocoite.com Mineral Locations
7 - EUROmin Project
8 -Google Images
9 -Google Scholar
10 -Handbook of Mineralogy (MinSocAm)
11 -Handbook of Mineralogy (UofA)
12 -MinDAT
13 -MinMax(Deutsch)
14 -MinMax(English)
15 -Mineralienatlas (Deutsch)
16 -QUT Mineral Atlas
17 - Simple Thinking
18 -École des Mines de Paris
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Polylithionite
KLi2AlSi4O10(F,OH)2
Dana No: 71.2.2b.8 Strunz No: VIII/H.11-10
Locality:
Notes:
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