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Gottardiite

Collectors Summary

Color farblos
Streak color weiß
Cleavages vollkommen {001}
Fracture muschelig bis unregelmäßig
Crystal System orthorhombisch, Cmca

Chemism

Chemical formula

Na3Mg3Ca5Al19Si117O272·93H2O

Chemical composition

Aluminium, Calcium, Magnesium, Natrium, Silicium, Sauerstoff, Wasserstoff

Unit weight: 10168.2028184 u; Number of atoms in the formula: 698

Info

Empirical formula:

Na3Mg3Ca5Al19Si117O272·93H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

1.84

186

26.65

1.0079470

187.4781420

Oxygen

O

57.43

365

52.29

15.9994300

5,839.7919500

Sodium

Na

0.68

3

0.43

22.9897702

68.9693106

Magnesium

Mg

0.72

3

0.43

24.3050600

72.9151800

Aluminium

Al

5.04

19

2.72

26.9815382

512.6492258

Silicon

Si

32.32

117

16.76

28.0855300

3,286.0070100

Calcium

Ca

1.97

5

0.72

40.0784000

200.3920000

Analysis wt%

Na2O : 0.91, MgO : 1.19, CaO : 2.76, Al2O3 : 9.53, SiO2 : 69.14, H2O : 16.48 (Ref: berechnet)

Strunz 9th edition incl. updates

9.GF.10

9: Silikate (Germanate)
G: Gerüstsilikate (Tektosilikate) mit zeolithischem H2O; Familie der Zeolithe
F: [Leucit]-Typ-Gerüste
10:Gottardiit-Gruppe

Lapis Classification

VIII/J.22-008

VIII: SILIKATE
J: Gerüstsilikate (mit Zeolithen)
22: Zeolith-Gruppe; Faserzeolithe

Classification by Hölzel

9.FL.170

9: SILICATES
F: Tektosilicates
L: Zeolites with 6-Rings

Dana 8th edition

77.01.06.08

77: Tektosilicates Tectosilicate Zeolite group
01: Tektosilicates Tectosilicate Zeolite group true zeolites
06: Mordenite and related species

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

Zeolite group  ⇒ NES zeolite structure group

Optical Properties

Color

farblos

Streak color

weiß

Diaphaneity (Transparency)

transparent

max. Birefringence

0.006

Birefringence chart\! Gottardiite title=Birefringence chart Gottardiite

Michel-Levy Color Chart viewed according to the maximum birefringence (at 30μm). Mineral color is not taken into account. Click on the image to enlarge or change thickness.

RI value α / ω / n

1.480

RI value β

1.485

RI value γ / ε

1.486

Ri mean

1.484

2V angle

Biaxial (-) 48°

Crystallography

Crystal System

orthorhombisch

Class (H-M)

mmm

Space Group number

64

Space Group

Cmca

Cell parameters a (Å)

13.698

Cell parameters b (Å)

25.213

Cell parameters c (Å)

22.660

Cell parameters a/b or c/a

0.543

Cell parameters c/b

0.899

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

1

Volumne (ų)

7826.031

X-Ray Powder Diffraction

11.34(100),
10.64(30),
4.64(30),
4.37(80),
4.01(60),
3.938(40),
3.428(30),
3.282(70)

XRD chart Gottardiite

Calculated from d-spacing and intensity at 0.1541838 nm (Cu)

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Density (g/cm³)

2.14

2.157 ( ρ calc. Mineralienatlas )

Cleavages

vollkommen {001}

Fracture

muschelig bis unregelmäßig

Tenacity

spröde

(Co-)Type locality

(Co-)Type locality

Antarktika/Ostantarktis/Viktorialand/Mt. Adamson

Preface

Author (Name, Year)

Galli & Quartieri & Vezzalini & Alberti, 1996

References

European Journal of Mineralogy 8 (1996), 687

IMA group assignments



 
 
 
Na3Mg3Ca5Al19Si117O272·93H2O
orthorhombisch
Cmca

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Actuality: 05. Oct 2022 - 12:25:36

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Spanish

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Russian

Готтардиит

CNMNC (IMA)-Number

IMA 1994-054

CNMNC symbol

Symbol

Gtt

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