Mineralogy Database

Zeophyllite Mineral Data

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General Zeophyllite Information

Help on Chemical  Formula: Chemical Formula: Ca4Si3O8(OH,F)4•2(H2O)
Help on Composition: Composition: Molecular Weight = 556.77 gm
   Sodium     0.41 %  Na    0.56 % Na2O
   Calcium   30.23 %  Ca   42.30 % CaO
   Aluminum   0.97 %  Al    1.83 % Al2O3
   Silicon   15.64 %  Si   33.45 % SiO2
   Hydrogen   2.24 %  H    20.06 % H2O
   Oxygen    43.68 %  O
   Fluorine   6.82 %  F     6.82 % F
               -   %   F    -2.87 % -O=F2    
            ______        ______ 
            100.00 %      102.16 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca4.2Na0.1Si3.1Al0.2O9F2•6.2(H2O)
Help on Environment: Environment: Secondary mineral from hydrothermal alteration of basalt.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1902
Help on Locality: Locality: Litomerice (Leitmeritz), Brezno and Labem (Gross-Priesen), Radejcin (Radzein), and Teplice (Teplitz), Czech Republic. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: From the Greek "to boil" and "a leaf", in allusion to its habit.
Help on Name Pronunciation: Name Pronunciation: Zeophyllite + Pronunciation Say ZEOPHYLLITE
Help on Synonym: Synonym: Foshallasite
  ICSD 85124
  PDF 35-715

Zeophyllite Image

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Comments: Numerous white zeophyllite spheroids on a tan matrix.
Location: Brenk, Eifel, Germany. Scale: 2.5 x 1.5 cm.
© John Veevaert

Zeophyllite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:3.90578
Help on Cell Dimensions: Cell Dimensions: a = 9.34, c = 36.48, Z = 8; V = 2,756.00 Den(Calc)= 2.68
Help on Crystal System: Crystal System: Trigonal - Rhombohedral H-M Symbol ( 3) Space Group: R 3
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 12(1), 3.03(0.8), 6.09(0.6),

Physical Properties of Zeophyllite

Help on Cleavage: Cleavage: {0001} Perfect
Help on Color: Color: White.
Help on Density: Density: 2.747 - 2.764, Average = 2.75
Help on Diaphaneity: Diaphaneity: Translucent to Opaque
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Habit: Habit: Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Help on Habit: Habit: Spherical - Spherical, rounded aggregates.
Help on Hardness: Hardness: 3 - Calcite
Help on Luster: Luster: Pearly
Help on Streak: Streak: white

Optical Properties of Zeophyllite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.122 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.097 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2118,KPDmeas= 0.206,KC= 0.2347
Ncalc = 1.63 - 1.65
Help on Optical Data: Optical Data: Uniaxial (-), e=1.56-1.569, w=1.565-1.577, bire=0.0050-0.0080.

Calculated Properties of Zeophyllite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.73 gm/cc
note: Specific Gravity of Zeophyllite =2.68 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.007923836
Boson Index = 0.992076164
Help on Photoelectric: Photoelectric: PEZeophyllite = 4.36 barns/electron
U=PEZeophyllite x rElectron Density= 11.87 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Zeophyllite is Not Radioactive

Zeophyllite Classification

Help on  Dana Class: Dana Class: (73)Phyllosilicate Condensed Tetrahedral Sheets
  (73.01)with double layers
  (73.01.04)Dana Group Zeophyllite Ca4Si3O8(OH,F)4•2(H2O) R 3 3
Help on  Strunz Class: Strunz Class: 09.EE.70 09 - SILICATES (Germanates)
  09.E - Phyllosilicates
  09.EE -Single tetrahedral nets of 6-membered rings
09.EE.70 Zeophyllite Ca4Si3O8(OH,F)4•2(H2O) R 3 3

Other Zeophyllite Information

Help on References: References: NAME( AntBidBlaNic2) PHYS. PROP.(AntBidBlaNic2) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Zeophyllite :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Athena
5 - EUROmin Project
6 - Ecole des Mines de Paris
7 - GeoScienceWorld
8 - Google Images
9 - Google Scholar
10 - Handbook of Mineralogy (MinSocAm)
11 - Handbook of Mineralogy (UofA)
12 - MinDAT
13 - Mineralienatlas (Deutsch)
14 - Online Mineral Museum
15 - QUT Mineral Atlas
16 - Ruff.Info

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Dana No: Strunz No: 09.EE.70





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