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Wairakite

Pictures (2 Images total)

Wairakit
Views (File:
1540300478
): 564
Wairakit
Tohi-Izu Mine, Shizuoka, Honshu, Japan. Bildbreite 1,3 mm
Copyright: Ulrich Baumgärtl; Contribution: Ulrich Baumgärtl
Collection: Ulrich Baumgärtl
Location: Japan/Honshu/Chubu, Region/Shizuoka, Präfektur/Izu, Stadt/Toi, Dorf/Toi Mine
Mineral: Wairakite
Image: 1540300478
License: Usage for Mineralienatlas project only
Wairakit

Tohi-Izu Mine, Shizuoka, Honshu, Japan. Bildbreite 1,3 mm

Collection: Ulrich Baumgärtl
Copyright: Ulrich Baumgärtl
Contribution: Ulrich Baumgärtl 2018-10-23
Locality: Toi Mine / Toi, Dorf / Izu, Stadt / Shizuoka, Präfektur / Chubu, Region / Honshu / Japan
Analcim-Wairakit
Views (File:
1632153582
): 166
Analcim-Wairakit
Typische deltoidikositetraedrische Analcim-Wairakit-Mischkristalle aus dem Albitit der Alpe Rosso, gefunden in Orcesco am Ende der Seilbahn an der Erzverladestelle (nahe der Eisenbahnverbindung zwischen Druogno und Coimo). Bildbreite etwa 4 mm.
Copyright: Klaus Schäfer; Contribution: Klaus Schäfer
Collection: Klaus Schäfer, Collection number: AR-AnWai-1-1-3
Location: Italien/Piemont (Piemonte), Region/Verbano-Cusio-Ossola, Provinz/Vigezzo, Valle (Tal)/Druogno/Orcesco
Mineral: Analcime, Wairakite
Image: 1632153582
License: Usage for Mineralienatlas project only
Analcim-Wairakit (SNr: AR-AnWai-1-1-3)

Typische deltoidikositetraedrische Analcim-Wairakit-Mischkristalle aus dem Albitit der Alpe Rosso, gefunden in Orcesco am Ende der Seilbahn an der Erzverladestelle (nahe der Eisenbahnverbindung zwi...

Collection: Klaus Schäfer
Copyright: Klaus Schäfer
Contribution: Klaus Schäfer 2021-09-20
Locality: Orcesco / Druogno / Vigezzo, Valle (Tal) / Verbano-Cusio-Ossola, Provinz / Piemont (Piemonte), Region / Italien

Collectors Summary

Color farblos, weiß
Streak color weiß
Hardness (Mohs) 5.75
Solubility +++ Säuren
Crystal System monoklin, I2/a

Chemism

Chemical formula

CaAl2Si4O12·2H2O

Chemical composition

Aluminium, Calcium, Silicium, Sauerstoff, Wasserstoff

Unit weight: 434.4074044 u; Number of atoms in the formula: 25

Info

Empirical formula:

CaAl2Si4O12·2H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.93

4

16.00

1.0079470

4.0317880

Oxygen

O

51.56

14

56.00

15.9994300

223.9920200

Aluminium

Al

12.42

2

8.00

26.9815382

53.9630764

Silicon

Si

25.86

4

16.00

28.0855300

112.3421200

Calcium

Ca

9.23

1

4.00

40.0784000

40.0784000

Analysis wt%

SiO2 : 55.90, Al2O3 : 23.00, CaO : 11.70, Na2O : 1.06, H2O : 8.50 (Ref: Mineralogical Magazine 55)

Strunz 9th edition incl. updates

9.GB.05

9: Silikate (Germanate)
G: Gerüstsilikate (Tektosilikate) mit zeolithischem H2O; Familie der Zeolithe
B: Ketten von einfach verbundenen vierer-Ringen
05:Analcim-Gruppe

Lapis Classification

VIII/J.27-030

VIII: SILIKATE
J: Gerüstsilikate (mit Zeolithen)
27: Zeolith-Gruppe; Würfelzeolithe

Classification by Hölzel

9.FJ.200

9: SILICATES
F: Tektosilicates
J: Singly connected 4-Ring Chains

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

Zeolite group  ⇒ ANA zeolite structure group

Optical Properties

Color

farblos, weiß

Streak color

weiß

Diaphaneity (Transparency)

transparent bis durchscheinend

max. Birefringence

0.004

Birefringence chart\! Wairakite title=Birefringence chart Wairakite

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

1.498

RI value β

1.500

RI value γ / ε

1.502

Ri mean

1.500

2V angle

Biaxial (+)- 88°!

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

15

Space Group

I2/a

Cell parameters a (Å)

13.69

Cell parameters b (Å)

13.68

Cell parameters c (Å)

13.56

Cell parameters a/b or c/a

1.001

Cell parameters c/b

0.991

Cell parameters α

90°

Cell parameters β

90.50

Cell parameters γ

90°

Z

8

Volumne (ų)

2539.409

X-Ray Powder Diffraction

6.830(30),
5.560(80),
3.423(40),
3.409(50),
3.386(100),
2.916(40),
2.911(30),
2.894(30)

XRD chart Wairakite

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

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

5.75

VHN (Hardness Vickers)

630 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.26

2.272 ( ρ calc. Mineralienatlas )

Instability

+++ Säuren

Preface

Author (Name, Year)

Steiner, 1955

References

Canadian Mineralogist 35 (1997), 1571

IMA group assignments



 
 
 
(NH4)(AlSi2O6)
tetragonal
I41/a

 
 
 
Na(Si2Al)O6·H2O
orthorhombisch
Ibca

 
 
 
Ca3Li2Be3(SiO4)3F2
kubisch
I213

 
 
 
CsBSi2O6
tetragonal
I41/acd

 
 
 
K(AlSi2)O6
tetragonal
I41/a

 
 
 
(Cs,Na)(Si2Al)O6·nH2O
kubisch
Ia3d

 
 
 
CaAl2Si4O12·2H2O
monoklin
I2/a

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Actuality: 29. Jan 2023 - 19:01:34

Other languages

German

Wairakit

Spanish

Wairakita

French

Wairakite

English

Wairakite

Russian

Вайракит

Simplified Chinese

斜钙沸石

Alternative Name

Calcium-Analcime

CNMNC symbol

Symbol

Wrk

Locations with GPS information