Ferrierite-K Mineral Data

General Ferrierite-K Information

Chemical Formula:

(K,Na)2Mg(Si,Al)18O36•9(H2O)

Composition:

Molecular Weight = 2,612.03 gm

Potassium 3.07 % K 3.70 % K₂O

Sodium 1.00 % Na 1.35 % Na₂O

Calcium 0.21 % Ca 0.30 % CaO

Magnesium 0.69 % Mg 1.14 % MgO

Aluminum 5.16 % Al 9.76 % Al₂O₃

Silicon 33.34 % Si 71.33 % SiO₂

Hydrogen 1.39 % H 12.41 % H₂O

Oxygen 55.13 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

K_2.05Na_1.14Mg_0.74Ca_0.14Al₅Si_31.01O₇₂•18(H₂O)

Environment:

Alteration product of basalts and as a diagenetic material in rhyolitic tuffaceous sediments and in metamorphic rocks.

IMA Status:

Approved IMA 1976 (Dana # Added)

Locality:

Santa Monica Mountains, California, U.S.A. Link to MinDat.org Location Data.

Name Origin:

Named for Walter Frederick Ferrier (1865-1950), Canadian geologist and mining engineer. The K-dominant member of the ferrierite series.

Name Pronunciation:

Ferrierite-K

Ferrierite-K Image

Images:

Ferrierite-K

Comments: Tufts of white to pinkish acicular ferrierite-K on blocky, transparent clinoptitolite.
Location: Kanan Road Quarry, Agoura, Los Angeles Co., California, USA. Scale: Not Given.
© Diederik Visser

Ferrierite-K Crystallography

Axial Ratios:

a:b:c =1.3417:1:0.5288

Cell Dimensions:

a = 18.973, b = 14.14, c = 7.478, Z = 1; V = 2,006.18 Den(Calc)= 2.16

Crystal System:

Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pnnm

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.537(1), 3.781(0.65), 9.51(0.5),

Physical Properties of Ferrierite-K

Cleavage:

{100} Perfect, {001} Imperfect

Color:

Colorless, White, Pink, Orange, Red.

Density:

2.06 - 2.23, Average = 2.14

Diaphaneity:

Transparent to translucent

Fracture:

Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.

Habit:

Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)

Habit:

Tabular - Form dimensions are thin in one direction.

Hardness:

3-3.5 - Calcite-Copper Penny

Luster:

Vitreous - Silky

Streak:

white

Optical Properties of Ferrierite-K

Gladstone-Dale:

CI meas= -0.006 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.001 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2233,KPDmeas= 0.2249,KC= 0.2235
Ncalc = 1.46 - 1.5

Optical Data:

Biaxial (+/-), a=1.473-1.489, b=1.474-1.489, g=1.477-1.492, bire=0.0030-0.0040

Calculated Properties of Ferrierite-K

Electron Density:

Bulk Density (Electron Density)=2.18 gm/cc
note: Specific Gravity of Ferrierite-K =2.16 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Ferrierite-K= 1.82 barns/electron
U=PE_Ferrierite-K x r_electron= 3.97 barns/cc.

Radioactivity:

GRapi = 44.70 (Gamma Ray American Petroleum Institute Units)
Concentration of Ferrierite-K per GRapi unit = 2.24 (%)

Estimated Radioactivity from Ferrierite-K - barely detectable

Ferrierite-K Classification

Dana Class:

77.01.06.06a (77)Tectosilicate Zeolite group

(77.01)true zeolites

(77.01.06)Mordenite and related species

77.01.06.01 Mordenite (Ca,Na2,K2)Al2Si10O24•7(H2O) C mc2₁ mm2

77.01.06.02 Epistilbite CaAl2Si6O16•5(H2O) C1 1

77.01.06.03 Maricopaite Pb7Ca2(Si,Al)48O100•32(H2O) Cm2m 2/m 2/m 2/m

77.01.06.04 Dachiardite-Ca (Ca,Na2,K2)5Al10Si38O96•25(H2O) C 2/m 2/m

77.01.06.05 Dachiardite-Na (Na2,Ca,K2)4Al4Si20O48•13(H2O) C 2/m 2/m

77.01.06.06 Ferrierite-Mg (Mg,Na,K)2Mg(Si,Al)18O36•9(H2O) Pnnm 2/m 2/m 2/m

77.01.06.06a Ferrierite-K! (K,Na)2Mg(Si,Al)18O36•9(H2O) Pnnm 2/m 2/m 2/m

77.01.06.06b Ferrierite-Na! (Na,K)2Mg(Si,Al)18O36•9(H2O) P 2₁/n 2/m

77.01.06.07 Boggsite NaCa2(Al5Si19O48)•17(H2O) I mma 2/m 2/m 2/m

77.01.06.08 Gottardiite! Na3Mg3Ca5Al19Si117O272•93(H2O) C mca 2/m 2/m 2/m

77.01.06.09 Terranovaite! (Na,Ca)8(Si68Al12)O160•29(H2O) C mcm 2/m 2/m 2/m

77.01.06.10 Mutinaite! Na3Ca4Si85Al11O192•60(H2O) P nma 2/m 2/m 2/m

77.01.06.12 Direnzoite! NaK6MgCa2(Al13Si47O120)•36H2O Pmmn 2/m 2/m 2/m

Strunz Class:

09.GD.50 09 - SILICATES (Germanates)

09.G - Tektosilicates with Zeolitic H2O

09.GD -Chains of 6-membered rings � tabular zeolites

09.GD.50 Ferrierite-K! (K,Na)2Mg(Si,Al)18O36•9(H2O) Pnnm 2/m 2/m 2/m

09.GD.50 Ferrierite-Mg (Mg,Na,K)2Mg(Si,Al)18O36•9(H2O) Pnnm 2/m 2/m 2/m

09.GD.50 Ferrierite-Na! (Na,K)2Mg(Si,Al)18O36•9(H2O) P 2₁/n 2/m

Other Ferrierite-K Information

References:

NAME( Dana8) PHYS. PROP.(CanMin, v 35 , p 1582) OPTIC PROP.(Dana8)

See Also:

Links to other databases for Ferrierite-K :
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

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Print or Cut-and-Paste your Ferrierite-K Specimen Label here :

Ferrierite-K

(K,Na)2Mg(Si,Al)18O36•9(H2O)
Dana No: 77.01.06.06a Strunz No: 09.GD.50
Locality:

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