Zeophyllite Mineral Data
General Zeophyllite Information
Chemical Formula:
Ca4Si3O8(OH,F)4•2(H2O)
Composition:
Molecular Weight = 556.77 gm
Sodium 0.41 % Na 0.56 % Na2 O
Calcium 30.23 % Ca 42.30 % CaO
Aluminum 0.97 % Al 1.83 % Al2 O3
Silicon 15.64 % Si 33.45 % SiO2
Hydrogen 2.24 % H 20.06 % H2 O
Oxygen 43.68 % O
Fluorine 6.82 % F 6.82 % F
- %
F -2.87 % -O=F2
______ ______
100.00 % 102.16 % = TOTAL OXIDE
Empirical Formula:
Ca4.2 Na0.1 Si3.1 Al0.2 O9 F2 •6.2(H2 O)
Environment:
Secondary mineral from hydrothermal alteration of basalt.
IMA Status:
Valid Species (Pre-IMA) 1902
Locality:
Litomerice (Leitmeritz), Brezno and Labem (Gross-Priesen), Radejcin (Radzein), and Teplice (Teplitz), Czech Republic. Link to MinDat.org Location Data.
Name Origin:
From the Greek "to boil" and "a leaf", in allusion to its habit.
Name Pronunciation:
Zeophyllite + Pronunciation
Synonym:
Foshallasite
ICSD 85124
PDF 35-715
Zeophyllite Image
Images:
Zeophyllite
Comments: Numerous white zeophyllite spheroids on a tan matrix.
Location: Brenk, Eifel, Germany.
Scale: 2.5 x 1.5 cm.
© John Veevaert
Zeophyllite Crystallography
Axial Ratios:
a:c = 1:3.90578
Cell Dimensions:
a = 9.34, c = 36.48, Z = 8; V = 2,756.00 Den(Calc)= 2.68
Crystal System:
Trigonal - Rhombohedral H-M Symbol ( 3 ) Space Group: R 3
X Ray Diffraction:
By Intensity(I/Io ): 12(1), 3.03(0.8), 6.09(0.6),
Physical Properties of Zeophyllite
Cleavage:
{0001} Perfect
Color:
White.
Density:
2.747 - 2.764, Average = 2.75
Diaphaneity:
Translucent to Opaque
Habit:
Platy - Sheet forms (e.g. micas).
Habit:
Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Habit:
Spherical - Spherical, rounded aggregates.
Hardness:
3 - Calcite
Luster:
Pearly
Streak:
white
Optical Properties of Zeophyllite
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
Optical Data:
Uniaxial (-), e=1.56-1.569, w=1.565-1.577, bire=0.0050-0.0080.
Calculated Properties of Zeophyllite
Electron Density:
Bulk Density (Electron Density)=2.73 gm/cc note: Specific Gravity of Zeophyllite =2.68 gm/cc.
Fermion Index:
Fermion Index = 0.007923836 Boson Index = 0.992076164
Photoelectric:
PEZeophyllite = 4.36 barns/electronU=PEZeophyllite x r Electron Density= 11.87 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Zeophyllite is Not Radioactive
Zeophyllite Classification
Dana Class:
73.01.04.01 (73) Phyllosilicate Condensed Tetrahedral Sheets
(73.01) with double layers
(73.01.04) Dana Group
73.01.04.01 Zeophyllite Ca4Si3O8(OH,F)4•2(H2O) R 3 3
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
References:
NAME( AntBidBlaNic2) PHYS. PROP.(AntBidBlaNic2) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
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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Print or Cut-and-Paste your Zeophyllite Specimen Label here :
Zeophyllite
Ca4Si3O8(OH,F)4•2(H2O)
Dana No: 73.01.04.01 Strunz No: 09.EE.70
Locality:
Notes:
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