Phillipsite-K Mineral Data

Phillipsite-K Mineral Data +

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General Phillipsite-K Information

Chemical Formula:

(K,Na,Ca)1-2(Si,Al)8O16·6(H2O)

Composition:

Molecular Weight = 661.10 gm

Potassium 4.73 % K 5.70 % K₂O

Sodium 2.43 % Na 3.28 % Na₂O

Calcium 4.24 % Ca 5.94 % CaO

Aluminum 11.43 % Al 21.59 % Al₂O₃

Silicon 22.09 % Si 47.26 % SiO₂

Hydrogen 1.83 % H 16.35 % H₂O

Oxygen 53.24 % O

______ ______

100.00 % 100.12 % = TOTAL OXIDE

Empirical Formula:

K_0.8Na_0.7Ca_0.7Si_5.2Al_2.8O₁₆·6(H₂O)

Environment:

Common zeolite in volcanic rocks, ore veins, diagenetically altered rhyolitic vitric tuffs, saline lake deposits, and ocean floor sediments. Shows solid solution toward harmotome.

IMA Status:

Approved IMA 1998 (Dana # Added)

Locality:

Capo di Bove, south of Rome, Italy. Link to MinDat.org Location Data.

Name Origin:

Named after William Phillips (1775-1829), English mineralogist and founder of the Geological Society of London. The K-dominant member of the phillipsite series.

Synonym:

Abrazite

Cross stone

Phillipsite-K Image

Images:

Phillipsite-K

Comments: Clear crystalline ball of phillipsite-K crystals.
Location: Bova, Calabria, Italy. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Phillipsite-K Crystallography

Axial Ratios:

a:b:c =0.7021:1:0.6141

Cell Dimensions:

a = 9.9, b = 14.1, c = 8.66, Z = 2; beta = 124.75° V = 993.25 Den(Calc)= 2.21

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/m

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

By Intensity(I/I_o): 3.21(1), 7.16(1), 7.18(1),

Crystal Structure:

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drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
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H - Help Screen
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Gualtieri A F , Journal of Applied Crystallography , 33 (2000) p.267-278, Accuracy of XRPD QPA using the combined Rietveld-RIR method, Locality: Vallerano, Rome, Italy

Physical Properties of Phillipsite-K

Cleavage:

[010] Distinct, [001] Indistinct

Color:

White, Reddish white, Light yellow, Pink.

Density:

2.2

Diaphaniety:

Translucent to opaque

Fracture:

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

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Habit:

Pseudo Tetragonal - Crystals show a tetragonal shape.

Habit:

Twinning Common - Crystals are usually twinned.

Hardness:

4-5 - Fluorite-Apatite

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Phillipsite-K

Gladstone-Dale:

CI meas= 0.011 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.015 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.225,KPDmeas= 0.226,KC= 0.2285

Optical Data:

Biaxial (+/-), a=1.483-1.505, b=1.484-1.511, g=1.486-1.514, bire=0.0030-0.0090, 2V(Calc)=70-72, 2V(Meas)=60-90. Dispersion r > v or r < v.

Calculated Properties of Phillipsite-K

Electron Density:

r_electron=2.22 gm/cc
note: r_{Phillipsite-K}=2.20 gm/cc.

Fermion Index

Fermion Index = 0.01063
Boson Index = 0.98937

Photoelectric:

PE_{Phillipsite-K}= 2.24 barns/electron
U=PE_{Phillipsite-K} x r_electron= 4.97 barns/cc.

Radioactivity:

GRapi = 69.02 (Gamma Ray American Petroleum Institute Units)

Estimated Radioactivity from Phillipsite-K - barely detectable

Phillipsite-K Classification

Dana Class:

77.1.3.6b (77)Tectosilicate Zeolite group

(77.1)true zeolites

(77.1.3)Gismondine and related species

77.1.3.1 Gismondine Ca2Al4Si4O16·9(H2O) P 2₁/c 2/m

77.1.3.2 Amicite K2Na2Al4Si4O16·5(H2O) I2 2

77.1.3.3 Garronite Na2Ca5Al12Si20O64·27(H2O) I 4₁/a 4/m

77.1.3.4 Gobbinsite (Na2,Ca)2K2Al6Si10O32·12(H2O) P mn2₁ mm2

77.1.3.5 Harmotome (Ba,Na,K)1-2(Si,Al)8O16·6(H2O) P 2₁/m 2/m

77.1.3.6 Phillipsite-Na (Na,K,Ca)1-2(Si,Al)8O16·6(H2O) P 2₁/m 2/m

77.1.3.6a Phillipsite-Ca! (Ca,K,Na)1-2(Si,Al)8O16·6(H2O) P 2₁/m 2/m

77.1.3.6b Phillipsite-K ! (K,Na,Ca)1-2(Si,Al)8O16·6(H2O) P 2₁/m 2/m

77.1.3.8 Perlialite K8Tl4Al12Si24O72·20(H2O) P 6/mmm 6/m 2/m 2/m

77.1.3.9 Paulingite-K (K2,Ca,Na2,Ba)5Al10Si35O90·45(H2O) Im3m 4/m 3 2/m

77.1.3.9a Paulingite-Na! (Na2,K2,Ca,Ba)5Al10Si35O90·45(H2O) Im3m 4/m 3 2/m

77.1.3.9b Paulingite-Ca! (Ca,K,Na,Ba)5[Al10Si35O84]·34(H2O) Im3m 4/m 3 2/m

77.1.3.10 Mazzite K2CaMg2(Al,Si)36O72·28(H2O) P 6₃/mmc 6/m 2/m 2/m

77.1.3.11 Merlinoite (K,Ca,Na,Ba)7Si23Al9O64·23(H2O) I mmm 2/m 2/m 2/m

77.1.3.12 Montesommaite (K,Na)9Al9Si23O64·10(H2O) F dd2 mm2

Strunz Class:

VIII/J.25-55 VIII - Silicates

VIII/J - Tectosilicates (network), with zeolite-structure, Bladed Zeolites

VIII/J.25 - Zeolite group, Amicite - Phillipsite - Yugawaralite series

VIII/J.25-10 Amicite K2Na2Al4Si4O16·5(H2O) I2 2

VIII/J.25-20 Gismondine Ca2Al4Si4O16·9(H2O) P 2₁/c 2/m

VIII/J.25-30 Gobbinsite (Na2,Ca)2K2Al6Si10O32·12(H2O) P mn2₁ mm2

VIII/J.25-40 Garronite Na2Ca5Al12Si20O64·27(H2O) I 4₁/a 4/m

VIII/J.25-50 Phillipsite-Na (Na,K,Ca)1-2(Si,Al)8O16·6(H2O) P 2₁/m 2/m

VIII/J.25-55 Phillipsite-K (K,Na,Ca)1-2(Si,Al)8O16·6(H2O) P 2₁/m 2/m

VIII/J.25-60 Phillipsite-Ca! (Ca,K,Na)1-2(Si,Al)8O16·6(H2O) P 2₁/m 2/m

VIII/J.25-70 Harmotome (Ba,Na,K)1-2(Si,Al)8O16·6(H2O) P 2₁/m 2/m

VIII/J.25-75 Montesommaite (K,Na)9Al9Si23O64·10(H2O) F dd2 mm2

VIII/J.25-80 Merlinoite (K,Ca,Na,Ba)7Si23Al9O64·23(H2O) I mmm 2/m 2/m 2/m

VIII/J.25-90 Yugawaralite CaAl2Si6O16·4(H2O) Pc m

Other Phillipsite-K Information

References:

NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)

See Also:

Links to other databases for Phillipsite-K :
1 - Alkali-Nuts(English) 2 - Alkali-Nuts(Francais) 3 -Am. Min. Crystal Structure Database 4 -Athena 5 - Crocoite.com Mineral Locations 6 -Google Images 7 -Google Scholar 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas

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

Phillipsite-K

(K,Na,Ca)1-2(Si,Al)8O16·6(H2O)
Dana No: 77.1.3.6b Strunz No: VIII/J.25-55
Locality:

Notes: