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

Momoiite

Pictures (2 Images total)

Momoiit
Views (File:
1386158355
): 790
Momoiit
grüner Momoiit, hellbraun Tephroit, leicht verwittert; Kurase Mine, Saijo, Ehime Präfektur, Shikoku, Japan
Copyright: Daisuke NISHIO-HAMANE; Contribution: Stefan
Location: Japan/Shikoku (Schikoku), Insel/Ehime, Präfektur/Saijo, Stadt/Kurase mine
Mineral: Momoiite
Image: 1386158355
Rating: 9 (votes: 1)
License: Usage for Mineralienatlas project only
Momoiit

grüner Momoiit, hellbraun Tephroit, leicht verwittert; Kurase Mine, Saijo, Ehime Präfektur, Shikoku, Japan

Copyright: Daisuke NISHIO-HAMANE
Contribution: Stefan 2013-12-04
Locality: Kurase mine / Saijo, Stadt / Ehime, Präfektur / Shikoku (Schikoku), Insel / Japan
Momoiit
Views (File:
1386158387
): 725
Momoiit
Poliertes Erz mit grünem Momoiit; Kurase Mine, Saijo, Ehime Präfektur, Shikoku, Japan
Copyright: Daisuke NISHIO-HAMANE; Contribution: Stefan
Location: Japan/Shikoku (Schikoku), Insel/Ehime, Präfektur/Saijo, Stadt/Kurase mine
Mineral: Momoiite
Image: 1386158387
License: Usage for Mineralienatlas project only
Momoiit

Poliertes Erz mit grünem Momoiit; Kurase Mine, Saijo, Ehime Präfektur, Shikoku, Japan

Copyright: Daisuke NISHIO-HAMANE
Contribution: Stefan 2013-12-04
Locality: Kurase mine / Saijo, Stadt / Ehime, Präfektur / Shikoku (Schikoku), Insel / Japan

Collectors Summary

Hardness (Mohs) 6.5
Crystal System kubisch, Ia3d

Chemism

Chemical formula

{Mn2+3}[V3+2](Si3)O12

Additional chem. information

Granat-Gruppe

Chemical composition

Mangan, Silicium, Sauerstoff, Vanadium

Unit weight: 542.9469197 u; Number of atoms in the formula: 20

Info

Empirical formula:

{Mn3}[V2](Si3)O12

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Oxygen

O

35.36

12

60.00

15.9994300

191.9931600

Silicon

Si

15.52

3

15.00

28.0855300

84.2565900

Vanadium

V

18.76

2

10.00

50.9415100

101.8830200

Manganese

Mn

30.36

3

15.00

54.9380499

164.8141497

Analysis wt%

SiO2 : 35.02, Al2O3 : 5.12, V2O3 : 21.96, FeO : 0.05, MgO : 0.28, MnO : 24.74, CaO : 12.24 (Ref: JMPS2010)

Strunz 9th edition incl. updates

9.AD.25

9: Silikate (Germanate)
A: Inselsilikate (Nesosilikate)
D: Insel(Neso)silikate ohne weitere Anionen; Kationen in oktahedraler [6] und gewöhnlich größerer Koordination
25:Granat-Gruppe

Lapis Classification

VIII/A.08-138

VIII: SILIKATE
A: Inselsilikate mit [SiO4] 4--Baugruppen
8: Kationen in kubischer und oktaedrischer Koordination [8+6]; Granat-Gruppe

Classification by Hölzel

9.AC.170

9: SILICATES
A: Nesosilicates
C: Garnet-Group
1: Pyralspites - 8-coord. Mg, Fe(2+), Mn(2+); Pyrope - Spessartine-Group

IMA status

Anerkanntes Mineral - IMA-WEB-Seite, Neue Mineralien Aug 2009

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

Garnet supergroup  ⇒ Silicate garnets; Garnet group (Z charge 12)

Optical Properties

RI value α / ω / n

1.86

Ri mean

1.869

2V angle

Isotropisch

Crystallography

Crystal System

kubisch

Class (H-M)

m3m

Space Group number

230

Space Group

Ia3d

Cell parameters a (Å)

11.924

Cell parameters b (Å)

-

Cell parameters c (Å)

-

Cell parameters a/b or c/a

1

Cell parameters c/b

-

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

8

Volume (ų)

1695.375

X-Ray Powder Diffraction

2.982(78), 2.667(100), 2.435(42), 2.339(20), 2.178(20), 1.935(21), 1.654(20), 1.594(30)

XRD chart Momoiite

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

Physical Properties

Hardness (Mohs)

6.5

VHN (Hardness Vickers)

960 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

4.01 (berechnet)

4.254 ( ρ calc. Mineralienatlas )

Preface

Name from

Prof. Hitoshi Momoi

Author (Name, Year)

Hidekazu Tanaka, 2009

Additional Information

Previously described as "Yamatoite", which was later discredited because the type material contained only about 40% of the Mn-V-garnet molecule.

References

IMA-WEB-Seite, Neue Mineralien Aug 2009

Grew, E.S., Locock, A.J., Mills, S.J., Galuskina, I.O., Galuskin, E.V., Halenius, U., 2012; Nomenclature of the garnet supergroup. American Mineralogist; preprint December 2012 - [Formel].

http://www.issp.u-tokyo.ac.jp/labs/mdcl/lab/denken/wordpress/?page_id=264

IMA group assignments

 
{X3}[Y2](Z3)φ12
 
 


 
 
 
{Fe2+3}[Al2](Si3)O12
kubisch
Ia3d

 
 
 
{Ca3}[Fe3+2](Si3)O12
kubisch
Ia3d

 
 
 
{Mn2+3}[Fe3+2](Si3)O12
kubisch
Ia3d

 
 
 
{Ca3}[Sc2](Si3)O12
kubisch
Ia3d

 
 
 
{Ca3}[V3+2](Si3)O12
kubisch
Ia3d

 
 
 
{Ca3}[Al2](Si3)O12
kubisch
Ia3d

 
 
 
{Ca3}[Ti2](SiAl2)O12
kubisch
Ia3d

 
 
 
{Mg3}[Cr3+2](Si3)O12
kubisch
Ia3d

 
 
 
{Mg3}[MgSi](Si3)O12
kubisch
 

 
 
 
{Y2Ca}[Mg2](Si3)O12
kubisch
Ia3d

 
 
 
{Mn2+3}[V3+2](Si3)O12
kubisch
Ia3d

 
 
 
{Ca3}[TiFe2+](Si3)O12
kubisch
Ia3d

 
 
 
{Mg3}[Al2](Si3)O12
kubisch
Ia3d

 
 
 
{Mn2+3}[Al2](Si3)O12
kubisch
Ia3d

 
 
 
{Ca3}[Cr3+2](Si3)O12
kubisch
Ia3d

Refresh list

Actuality: 17. Jun 2024 - 00:12:08

Other languages

German

Momoiit

Spanish

Momoiita

English

Momoiite

Russian

Момоиит

Japanese

桃井石榴石

CNMNC (IMA)-Number

IMA 2009-026

CNMNC symbol

Symbol

Mom

IDs

GUSID (Global unique identifier short form) k-XaQrCoukCHt4pyqQc0oA
GUID (Global unique identifier) 42DAE593-A8B0-40BA-87B7-8A72A90734A0
Database ID 5253