https://www.mineralbox.biz
https://www.mineraliengrosshandel.com
https://www.mineral-bosse.de
https://www.edelsteine-neuburg.de
'._('einklappen').'
 

Itoigawaite (Itoigawaíta)

Pictures (1 Images total)

Itoigawait
Views (File:
1382515221
): 400
Itoigawait
blauer Itoigawait in Jadeit als Rissfüllung. Bildbreite ca. 5 cm. Fundort: Ohmi, Itoigawa, Japan
Copyright: Stefan; Contribution: Stefan
Location: Japan/Honshū (Honschu), Insel/Chūbu (Chubu), Region/Niigata, Präfektur/Itoigawa/Ohmi
Mineral: Itoigawaite
Image: 1382515221
License: Usage for Mineralienatlas project only
Itoigawait

blauer Itoigawait in Jadeit als Rissfüllung. Bildbreite ca. 5 cm. Fundort: Ohmi, Itoigawa, Japan

Copyright: Stefan
Contribution: Stefan 2013-10-23
Locality: Ohmi / Itoigawa / Niigata, Präfektur / Chūbu (Chubu), Region / Honshū (Honschu), Insel / Japan

Collectors Summary

Color blau
Streak color weiß
Hardness (Mohs) 5.75
Cleavages gut in einer Richtung
Crystal System orthorhombisch, Cmcm

Chemism

Chemical formula

SrAl2[(OH)2|Si2O7]·H2O

Chemical composition

Aluminium, Silicium, Strontium, Sauerstoff, Wasserstoff

Unit weight: 361.7812244 u; Number of atoms in the formula: 19

Info

Empirical formula:

SrAl2[(OH)2Si2O7]·H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

1.11

4

21.05

1.0079470

4.0317880

Oxygen

O

44.22

10

52.63

15.9994300

159.9943000

Aluminium

Al

14.92

2

10.53

26.9815382

53.9630764

Silicon

Si

15.53

2

10.53

28.0855300

56.1710600

Strontium

Sr

24.22

1

5.26

87.6210000

87.6210000

Strunz 9th edition incl. updates

9.BE.05

9: Silikate (Germanate)
B: Gruppensilikate (Sorosilikate)
E: Si2O7 Gruppen mit zusätzlichen Anionen; Kationen in oktahedraler [6] und größerer Koordination
05:Lawsonit-Gruppe

Lapis Classification

VIII/C.10-012

VIII: SILIKATE
C: Gruppensilikate
10: Gruppensilikate [Si2O7] 6-, mit tetraederfremden Anionen (O,OH,F)

Classification by Hölzel

9.BE.310

9: SILICATES
B: Sorosilicates
E: Cuspidine-Tilleyite-Group

Dana 8th edition

56.02.03.05

56: Sorosilicates Sorosilicate Si2O7 Groups and O, OH, F. and H2O
02: Sorosilicates Sorosilicate Si2O7 Groups and O, OH, F. and H2O with cations in [4] and/or >[4] coordination
03: Lawsonite - Ilvaite group

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

blau

Streak color

weiß

Diaphaneity (Transparency)

transparent

max. Birefringence

0.024

Birefringence chart\! Itoigawaite title=Birefringence chart Itoigawaite

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

1.664

RI value β

1.674

RI value γ / ε

1.688

Ri mean

1.675

2V angle

Biaxial (+) 81°c

Crystallography

Crystal System

orthorhombisch

Class (H-M)

mmm

Space Group number

63

Space Group

Cmcm

Cell parameters a (Å)

6.031

Cell parameters b (Å)

8.945

Cell parameters c (Å)

13.219

Cell parameters a/b or c/a

0.674

Cell parameters c/b

1.478

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

4

Volume (ų)

713.129

X-Ray Powder Diffraction

4.68(70),
4.26(90),
3.31(90),
2.75(90),
2.68(100),
2.63(70),
2.50(70),
2.45(70)

XRD chart Itoigawaite

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

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

5.75

VHN (Hardness Vickers)

615 (100g)

Density (g/cm³)

3.3 (berechnet)

3.369 ( ρ calc. Mineralienatlas )

Cleavages

gut in einer Richtung

Preface

Author (Name, Year)

Miyajima & Matsubara & Miyawaki & Ito, 1999

References

Mineralogical Magazine 63 (1999), 909

Other languages

German

Itoigawait

French

Itoigawaite

English

Itoigawaite

Spanish

Itoigawaíta

Russian

Итоигаваит

Alternative Name

Japanese

糸魚川石 

CNMNC (IMA)-Number

IMA 1998-034

CNMNC symbol

Symbol

Ito

IDs

GUSID (Global unique identifier short form) PUEDtYgabEG9Jr-eEpOSBw
GUID (Global unique identifier) B503413D-1A88-416C-BD26-BF9E12939207
Database ID 1749