Pachnolite Mineral Data + Say PACHNOLITE


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General Pachnolite Information

Help on Chemical  Formula: Chemical Formula: NaCaAlF6·(H2O)
Help on Composition: Composition: Molecular Weight = 222.06 gm
   Sodium    10.35 %  Na   13.96 % Na2O
   Calcium   18.05 %  Ca   25.25 % CaO
   Aluminum  12.15 %  Al   22.96 % Al2O3
   Hydrogen   0.91 %  H     8.11 % H2O
   Oxygen     7.21 %  O
   Fluorine  51.33 %  F    51.33 % F
               -   %  F   -21.62 % -O=F2
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: NaCaAlF6·(H2O)
Help on Environment: Environment: Alteration product of cryolite.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1863
Help on Locality: Locality: Greenland, Ural Mountains, Russia. Link to MinDat.org Location Data.
Help on Synonym: Synonym: ICSD 40132
  PDF 5-356
 

Pachnolite Image

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Pachnolite

Comments: Color-zoned (darker core) prismatic translucent pachnolite crystals, with secondary white prismatic microcrystals.
Location: Ivigtut, Greenland. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Pachnolite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.1638:1:1.5056
Help on Cell Dimensions: Cell Dimensions: a = 12.12, b = 10.414, c = 15.68, Z = 16; beta = 90.36° V = 1,979.05 Den(Calc)= 2.98
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: F2/d
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.95(1), 1.971(0.9), 2.79(0.7),
Help on Forms: Forms:

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Forms: [ 2 2 1] [ 1 1 1] [ 1 1 0]

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Hawthorne F C , Ferguson R B , The Canadian Mineralogist , 21 (1983) p.561-566, The crystal structure of pachnolite

 

Physical Properties of Pachnolite

Help on Cleavage: Cleavage: [001] Poor
Help on Color: Color: Colorless, White.
Help on Density: Density: 2.98
Help on Diaphaniety: Diaphaniety: Transparent
Help on Fracture: Fracture: Brittle - Uneven - Very brittle fracture producing uneven fragments.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Habit: Habit: Pseudo Orthorhombic - Crystals show an orthorhombic shape.
Help on Habit: Habit: Twinning Common - Crystals are usually twinned.
Help on Hardness: Hardness: 3 - Calcite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous - Greasy
Help on Magnetism: Magnetism: Nonmagnetic
Help on Streak: Streak: white
 

Optical Properties of Pachnolite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.222 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.222 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1391,KPDmeas= 0.1391,KC= 0.1788
Help on Optical Data: Optical Data: Biaxial (+), a=1.411, b=1.413, g=1.42, bire=0.0090
 

Calculated Properties of Pachnolite

Help on Electron Density: Electron Density:

relectron=2.90 gm/cc
note: rPachnolite =2.98 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.00027
Boson Index = 0.99973
Help on Photoelectric: Photoelectric:

PEPachnolite = 3.06 barns/electron
U=PEPachnolite x relectron= 8.87 barns/cc.

Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Pachnolite is Not Radioactive

 

Pachnolite Classification

Help on  Dana Class: Dana Class: 11.6.5.1 (11)Halide Complexes; Alumino-fluorides
  (11.6)with miscellaneous formulae
  (11.6.5)Dana Group
 
11.6.5.1 Pachnolite NaCaAlF6·(H2O) F2/d 2/m
Help on  Strunz Class: Strunz Class: III/C.02-10 III - Halogenides
  III/C - Double halogenides with water, Fluorides
  III/C.02 - Pachnolite - Yaroslavite series
 
III/C.02-10 Pachnolite NaCaAlF6·(H2O) F2/d 2/m
 
III/C.02-20 Thomsenolite NaCaAlF6·(H2O) P 21/c 2/m
 
III/C.02-30 Yaroslavite Ca3Al2F10(OH)2·(H2O) Unk Ortho
 

Other Pachnolite Information

Help on References: References: NAME( Ford32) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Pachnolite :
1 -Am. Min. Crystal Structure Database 2 - Amethyst Galleries' Mineral Gallery 3 -Athena 4 - EUROmin Project 5 -Google Images 6 -Google Scholar 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 -École des Mines de Paris

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Pachnolite

NaCaAlF6·(H2O)
Dana No: 11.6.5.1 Strunz No: III/C.02-10
Locality:

 

Notes:

 

 
   
 
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