Ferrierite-Mg Mineral Data

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General Ferrierite-Mg Information

Chemical Formula:

(Mg,Na,K)2Mg(Si,Al)18O36•9(H2O)

Composition:

Molecular Weight = 2,612.43 gm

Potassium 1.78 % K 2.15 % K₂O

Barium 0.11 % Ba 0.12 % BaO

Sodium 0.49 % Na 0.66 % Na₂O

Strontium 0.50 % Sr 0.59 % SrO

Calcium 0.49 % Ca 0.69 % CaO

Magnesium 1.88 % Mg 3.12 % MgO

Aluminum 7.12 % Al 13.45 % Al₂O₃

Silicon 31.22 % Si 66.79 % SiO₂

Hydrogen 1.38 % H 12.32 % H₂O

Oxygen 55.03 % O

______ ______

100.00 % 99.88 % = TOTAL OXIDE

Empirical Formula:

Na_0.56K_1.19Mg_2.02Ca_0.32Sr_0.15Ba_0.02Al_6.89Si_29.04O₇₂·17.86(H₂O)

Environment:

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

IMA Status:

Valid Species (Pre-IMA) 1918

Locality:

Railroad cut on the north shore of Kamloops lake, British Columbia, Canada. Link to MinDat.org Location Data.

Name Origin:

Named for Walter Frederick Ferrier (1865-1950), Canadian geologist and mining engineer. Mg modifier added by zeolite nomenclature committee.

Name Pronunciation:

Ferrierite-Mg

Ferrierite-Mg Image

Images:

Ferrierite-Mg

Comments: Orange, druzy crusts of ferrierite-Mg lining a pocket.
Location: Monte Lake, Kamloops Mining Division, British Columbia, Canada. Scale: Specimen Size 3.2 x 2.6 x 2.5 cm.
© Rob Lavinsky

Ferrierite-Mg Crystallography

Axial Ratios:

a:b:c =1.3582:1:0.5301

Cell Dimensions:

a = 19.213, b = 14.145, c = 7.499, Z = 1; V = 2,037.99 Den(Calc)= 2.13

Crystal System:

Orthorhombic - DipyramidalH-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),

Crystal Structure:

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Alberti A , Sabelli C , Zeitschrift fur Kristallographie , 178 (1987) p.249-256, Statistical and true symmetry of ferrierite:, possible absence of straight T-O-T bridging bonds, Locality: Monastir, Sardinia, Italy

Physical Properties of Ferrierite-Mg

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-Mg

Gladstone-Dale:

CI meas= -0.009 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.016 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2264,KPDmeas= 0.2249,KC= 0.2228
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-Mg

Electron Density:

Bulk Density (Electron Density)=2.16 gm/cc
note: Specific Gravity of Ferrierite-Mg =2.15 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_{Ferrierite-Mg}= 2.67 barns/electron
U=PE_{Ferrierite-Mg} x r_electron= 5.77 barns/cc.

Radioactivity:

GRapi = 25.93 (Gamma Ray American Petroleum Institute Units)
Concentration of Ferrierite-Mg per GRapi unit = 3.86 (%)

Estimated Radioactivity from Ferrierite-Mg - barely detectable

Ferrierite-Mg Classification

Dana Class:

77.01.06.06 (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-Mg Information

References:

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

See Also:

Links to other databases for Ferrierite-Mg :
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-Mg Specimen Label here :

Ferrierite-Mg

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

Notes: