Partheite Mineral Data

General Partheite Information

Chemical Formula:

Ca2Al4Si4O15(OH)2•4(H2O)

Composition:

Molecular Weight = 646.49 gm

Calcium 12.40 % Ca 17.35 % CaO

Aluminum 16.69 % Al 31.54 % Al₂O₃

Silicon 17.38 % Si 37.18 % SiO₂

Hydrogen 1.56 % H 13.93 % H₂O

Oxygen 51.97 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ca₂Al₄Si₄O₁₅(OH)₂•4(H₂O)

Environment:

Ophiolite zone in rodingitic rocks. Dimorph of lawsonite.

IMA Status:

Approved IMA 1979

Locality:

Taurus Mountains, Burdur Province, southwestern Trukey. Link to MinDat.org Location Data.

Name Origin:

Named for Erwin Parthe (1928-), crystallographer at the University of Geneva.

Name Pronunciation:

Partheite + Pronunciation

Partheite Image

Images:

Partheite

Comments: 3 mm thick white band of partheite in matrix.
Location: Denezhkin, Kamen, Nord Urals, Russia. Scale: 0.9 x 1.6 cm.
© John Veevaert

Partheite Crystallography

Axial Ratios:

a:b:c =2.4589:1:1.0603

Cell Dimensions:

a = 21.59, b = 8.78, c = 9.31, Z = 4; beta = 91.47° V = 1,764.22 Den(Calc)= 2.43

Crystal System:

Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/c

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

By Intensity(I/I_o): 10.79(1), 8.12(0.8), 6.1(0.7),

Physical Properties of Partheite

Cleavage:

{100} Distinct, {110} Distinct

Color:

White, Colorless.

Density:

2.39 - 2.45, Average = 2.42

Diaphaneity:

Transparent

Habit:

Fibrous - Crystals made up of fibers.

Habit:

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

Hardness:

4 - Fluorite

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Partheite

Gladstone-Dale:

CI meas= -0.01 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.006 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2278,KPDmeas= 0.2288,KC= 0.2264
Ncalc = 1.54 - 1.55

Optical Data:

Biaxial (+), a=1.547-1.55, b=1.549-1.552, g=1.559-1.565, bire=0.0120-0.0150, 2V(Calc)=44-50, 2V(Meas)=48. Dispersion r > v moderate.

Calculated Properties of Partheite

Electron Density:

Bulk Density (Electron Density)=2.45 gm/cc
note: Specific Gravity of Partheite =2.43 gm/cc.

Fermion Index:

Fermion Index = 0.008534331
Boson Index = 0.991465669

Photoelectric:

PE_Partheite= 2.69 barns/electron
U=PE_Partheite x rElectron Density= 6.60 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Partheite is Not Radioactive

Partheite Classification

Dana Class:

77.02.04.01 (77)Tectosilicate Zeolite group

(77.02)related species

(77.02.04)Dana Group

77.02.04.01 Partheite Ca2Al4Si4O15(OH)2•4(H2O) C 2/c 2/m

Strunz Class:

09.GB.35 09 - SILICATES (Germanates)

09.G - Tektosilicates with Zeolitic H2O

09.GB -Chains of single connected 4-membered rings

09.GB.35 Partheite Ca2Al4Si4O15(OH)2•4(H2O) C 2/c 2/m

Other Partheite Information

References:

NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)

See Also:

Links to other databases for Partheite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST
16 - Zeolite Database by Bruno Herreros

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Print or Cut-and-Paste your Partheite Specimen Label here :

Partheite

Ca2Al4Si4O15(OH)2•4(H2O)
Dana No: 77.02.04.01 Strunz No: 09.GB.35
Locality:

Notes:

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