Catapleiite Mineral Data

Catapleiite Mineral Data +

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General Catapleiite Information

Chemical Formula:

(Na,Ca,[ ])2ZrSi3O9·2(H2O)

Composition:

Molecular Weight = 414.57 gm

Sodium 5.55 % Na 7.48 % Na₂O

Calcium 8.70 % Ca 12.17 % CaO

Zirconium 22.00 % Zr 29.72 % ZrO₂

Silicon 20.32 % Si 43.48 % SiO₂

Hydrogen 0.97 % H 8.69 % H₂O

Oxygen 42.45 % O

______ ______

100.00 % 101.54 % = TOTAL OXIDE

Empirical Formula:

NaCa_0.9ZrSi₃O₉·2(H₂O)

IMA Status:

Valid Species (Pre-IMA) 1850

Locality:

Laven Island, Langesundfjord area, and Bratthagen, Norway. Link to MinDat.org Location Data.

Name Origin:

Named from the Greek for "wholly' and "full", because it is always accompanied by a number of rare minerals.

Catapleiite Image

Images:

Catapleiite Aegirine

Comments: Clear crystals of catapleiite with an attached 1.8 cm prismatic crystal of dark aegirine.
Location: Mt. St. Hilaire, Quebec, Canada. Scale: 3.5 x 2.2 cm.
© John Veevaert

Catapleiite Crystallography

Axial Ratios:

a:b:c =1.187:1:0.3688

Cell Dimensions:

a = 23.917, b = 20.148, c = 7.432, Z = 8; beta = 147.46° V = 1,926.36 Den(Calc)= 2.86

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: B2/b (pseudo-HEX)

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

By Intensity(I/I_o): 2.96(1), 3.05(1), 3.94(1),

Crystal Structure:

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Merlino S , Pasero M , Bellezza M , Pushcharovsky D Y , Gobetchia E R , Zubkova N V , Pekov I V , The Canadian Mineralogist , 42 (2004) p.1037-1045, The crystal structure of calcium catapleiite

View Additional jPOWD Structure files for Catapleiite
[1]

Physical Properties of Catapleiite

Cleavage:

[110] Perfect, [010] Perfect

Color:

Blue, Brown, Colorless, Yellow, Yellow brown.

Density:

2.75

Diaphaniety:

Transparent to translucent

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Habit:

Platy - Sheet forms (e.g. micas).

Habit:

Pseudo Hexagonal - Crystals show a hexagonal outline.

Hardness:

6 - Orthoclase

Luminescence:

Non-fluorescent.

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Catapleiite

Gladstone-Dale:

CI meas= 0.014 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.052 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.211,KPDmeas= 0.2194,KC= 0.2225

Optical Data:

Biaxial (+), a=1.591, b=1.592, g=1.627, bire=0.0360

Calculated Properties of Catapleiite

Electron Density:

r_electron=2.69 gm/cc
note: r_Catapleiite=2.75 gm/cc.

Fermion Index

Fermion Index = 0.0345
Boson Index = 0.9655

Photoelectric:

PE_Catapleiite= 30.87 barns/electron
U=PE_Catapleiite x r_electron= 83.13 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Catapleiite is Not Radioactive

Catapleiite Classification

Dana Class:

59.2.2.1 (59)Cyclosilicate Three-Membered Rings

(59.2)hydrated

(59.2.2)Catapleiite group

59.2.2.1 Catapleiite (Na,Ca,[])2ZrSi3O9·2(H2O) B2/b (pseudo-HEX) 2/m

59.2.2.2 Calcium-catapleiite (Ca,[])ZrSi3O9·2(H2O) Pbnn 2/m 2/m 2/m

59.2.2.3 Gaidonnayite Na2ZrSi3O9·2(H2O) P 2₁nb mm2

59.2.2.4 Georgechaoite KNaZrSi3O9·2(H2O) P 2₁nb mm2

59.2.2.5 Loudounite NaCa5Zr4Si16O40(OH)11·8(H2O) Mono

59.2.2.6 Bobtraillite! Na15Sr12Zr14Si42B6O138(OH)6·12(H2O) P 6₃cm 6mm

Strunz Class:

VIII/E.04-10 VIII - Silicates

VIII/E - Cyklosilicates, triplet rings [Si3O9]6-

VIII/E.04 - Catapleiite - Komkovite series

VIII/E.04-10 Catapleiite (Na,Ca,[])2ZrSi3O9·2(H2O) B2/b (pseudo-HEX) 2/m

VIII/E.04-30 Gaidonnayite Na2ZrSi3O9·2(H2O) P 2₁nb mm2

VIII/E.04-40 Georgechaoite KNaZrSi3O9·2(H2O) P 2₁nb mm2

VIII/E.04-50 Komkovite BaZrSi3O9·3(H2O) R 32 3 2

Other Catapleiite Information

References:

NAME( Ford32) PHYS. PROP.(Dana8) OPTIC PROP.(Ford32)

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Catapleiite

(Na,Ca,[ ])2ZrSi3O9·2(H2O)
Dana No: 59.2.2.1 Strunz No: VIII/E.04-10
Locality:

Notes: