General Apophyllite-(NaF) Information Chemical Formula: |
NaCa4Si8O20F•8(H2O) |
Composition: |
Molecular Weight = 891.09 gm |
|
Sodium 2.58 % Na 3.48 % Na2O |
|
Calcium 17.99 % Ca 25.17 % CaO |
|
Silicon 25.21 % Si 53.94 % SiO2 |
|
Hydrogen 1.81 % H 16.17 % H2O |
|
Oxygen 50.27 % O |
|
Fluorine 2.13 % F 2.13 % F |
|
- %
F -0.90 % -O=F2 |
|
______ ______ |
|
100.00 % 100.00 % = TOTAL OXIDE |
Empirical Formula: |
NaCa4Si8O20F•8(H2O) |
IMA Status: |
Approved IMA 1981 |
Locality: |
Link to MinDat.org Location Data. |
Name Origin: |
From the Greek apophylliso - "it flakes off" and the composition. |
Name Pronunciation: |
Apophyllite-(NaF) + Pronunciation |
Synonym: |
Natroapophyllite - Renamed to Apophyllite-(NaF) by Mineralogical Record, v39, (2008), p 131 |
| | Apophyllite-(NaF) Image
Images:
|
|
Apophyllite-(NaF) Crystallography Axial Ratios: |
a:b:c =0.9993:1:1.7779 |
Cell Dimensions: |
a = 8.875, b = 8.881, c = 15.79, Z = 2; V = 1,244.55 Den(Calc)= 2.38 |
Crystal System: |
Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pnnm |
X Ray Diffraction: |
By Intensity(I/Io): 3.96(1), 2.98(0.63), 7.83(0.2), |
Crystal Structure:
|
Mouse
|
| Physical Properties of Apophyllite-(NaF) Cleavage: |
{001} Perfect |
Color: |
White, Pink, Green, Yellow, Violet. |
Density: |
2.3 - 2.4, Average = 2.34 |
Diaphaneity: |
Transparent to Translucent |
Habit: |
Crystalline - Coarse - Occurs as well-formed coarse sized crystals. |
Habit: |
Massive - Uniformly indistinguishable crystals forming large masses. |
Habit: |
Pseudo Cubic - Crystals show a cubic outline. |
Hardness: |
4-5 - Fluorite-Apatite |
Luminescence: |
Non-fluorescent. |
Luster: |
Vitreous - Pearly |
Streak: |
white |
| Optical Properties of Apophyllite-(NaF) Gladstone-Dale: |
CI meas= -0.008 (Superior) - where the CI = (1-KPDmeas/KC) |
CI calc= 0.005 (Superior) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2266,KPDmeas= 0.2295,KC= 0.2277 Ncalc = 1.52 - 1.55 Optical Data: |
Biaxial (+), a=1.536, b=1.538, g=1.544, bire=0.0080, 2V(Calc)=62, 2V(Meas)=32. |
| Calculated Properties of Apophyllite-(NaF) Electron Density: |
Bulk Density (Electron Density)=2.41 gm/cc |
note: Specific Gravity of Apophyllite-(NaF) =2.38 gm/cc. Fermion Index: |
Fermion Index = 0.01 |
Boson Index = 0.99 Photoelectric: |
PEApophyllite-(NaF) = 3.23 barns/electron |
U=PEApophyllite-(NaF) x rElectron Density= 7.81 barns/cc. Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) |
Apophyllite-(NaF) is Not Radioactive | Apophyllite-(NaF) Classification Dana Class: |
72.03.01.03 (72)Phyllosilicate Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings |
|
(72.03)with 3-, 4-, or 5-membered rings and 8-membered rings |
|
(72.03.01)Apophyllite group (4- & 8-membered rings) |
|
|
|
|
|
Strunz Class: |
09.EA.15 09 - SILICATES (Germanates) |
|
09.E - Phyllosilicates |
|
09.EA -Single nets of tetrahedra with 4-, 5-, (6-), and 8-membered rings |
|
|
|
|
| Other Apophyllite-(NaF) Information References: |
PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) |
See Also: |
Links to other databases for Apophyllite-(NaF) : |
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 Search for Apophyllite-(NaF) using: Visit our Advertisers for Apophyllite-(NaF) : A Bijoux Google Search for Apophyllite-(NaF)Adam's Minerals Google Search for Apophyllite-(NaF) Cape Minerals Google Search for Apophyllite-(NaF) Dakota Matrix Minerals Google Search for Apophyllite-(NaF) Excalibur Mineral Corp. Google Search for Apophyllite-(NaF) Exceptional Minerals Google Search for Apophyllite-(NaF) John Betts Fine Minerals Search for Apophyllite-(NaF) McDougall Minerals Google Search for Apophyllite-(NaF) Mineral News Website Link Rock and Mineral Shows Google Search for Apophyllite-(NaF) Weinrich Minerals, Inc. Google Search for Apophyllite-(NaF) Ask about Apophyllite-(NaF) here : Print or Cut-and-Paste your Apophyllite-(NaF) Specimen Label here :
| |
|
| |