Pachnolite Mineral Data
General Pachnolite Information
Chemical Formula:
NaCaAlF6•(H2O)
Composition:
Molecular Weight = 222.06 gm
Sodium 10.35 % Na 13.96 % Na2 O
Calcium 18.05 % Ca 25.25 % CaO
Aluminum 12.15 % Al 22.96 % Al2 O3
Hydrogen 0.91 % H 8.11 % H2 O
Oxygen 7.21 % O
Fluorine 51.33 % F 51.33 % F
- %
F -21.62 % -O=F2
______ ______
100.00 % 100.00 % = TOTAL OXIDE
Empirical Formula:
NaCaAlF6 •(H2 O)
Environment:
Alteration product of cryolite.
IMA Status:
Valid Species (Pre-IMA) 1863
Locality:
Greenland, Ural Mountains, Russia. Link to MinDat.org Location Data.
Name Origin:
Named from the Greek for frost and stone, in allusion to its appearance.
Name Pronunciation:
Pachnolite + Pronunciation
Synonym:
ICSD 40132
PDF 5-356
Pachnolite Image
Images:
Pachnolite Crystallography
Axial Ratios:
a:b:c =1.1638:1:1.5056
Cell Dimensions:
a = 12.12, b = 10.414, c = 15.68, Z = 16; beta = 90.36° V = 1,979.05 Den(Calc)= 2.98
Crystal System:
Monoclinic - Prismatic H-M Symbol (2/m) Space Group: F2/d
X Ray Diffraction:
By Intensity(I/Io ): 3.95(1), 1.971(0.9), 2.79(0.7),
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Physical Properties of Pachnolite
Cleavage:
{001} Poor
Color:
Colorless, White.
Density:
2.98
Diaphaneity:
Transparent
Fracture:
Brittle - Uneven - Very brittle fracture producing uneven fragments.
Habit:
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Habit:
Pseudo Orthorhombic - Crystals show an orthorhombic shape.
Habit:
Twinning Common - Crystals are usually twinned.
Hardness:
3 - Calcite
Luminescence:
Non-fluorescent.
Luster:
Vitreous - Greasy
Magnetism:
Nonmagnetic
Streak:
white
Optical Properties of Pachnolite
Optical Data:
Biaxial (+), a=1.411, b=1.413, g=1.42, bire=0.0090
Calculated Properties of Pachnolite
Electron Density:
Bulk Density (Electron Density)=2.90 gm/cc note: Specific Gravity of Pachnolite =2.98 gm/cc.
Fermion Index:
Fermion Index = 0.0002796037 Boson Index = 0.9997203963
Photoelectric:
PEPachnolite = 3.06 barns/electronU=PEPachnolite x r Electron Density= 8.87 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Pachnolite is Not Radioactive
Pachnolite Classification
Dana Class:
11.06.05.01 (11) Halide Complexes; Alumino-fluorides
(11.06) with miscellaneous formulae
(11.06.05) Dana Group
11.06.05.01 Pachnolite NaCaAlF6•(H2O) F2/d 2/m
Strunz Class:
03.CB.40 03 - HALIDES
03.C - Complex Halides
03.CB -Neso-aluminofluorides
03.CB.40 Pachnolite NaCaAlF6•(H2O) F2/d 2/m
03.CB.40 Thomsenolite NaCaAlF6•(H2O) P 21 /c 2/m
Other Pachnolite Information
References:
NAME( Ford32) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
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 - Ecole des Mines de Paris
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info
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Pachnolite
NaCaAlF6•(H2O)
Dana No: 11.06.05.01 Strunz No: 03.CB.40
Locality:
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