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Momoiit

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

Daisuke NISHIO-HAMANE

Contribution: Stefan 2013-12-04

Locality: Kurase mine / Saijo, Stadt / Ehime, Präfektur / Shikoku / Japan

Views (Image: 1386158387): 651

Momoiit

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

Daisuke NISHIO-HAMANE

Contribution: Stefan 2013-12-04

Locality: Kurase mine / Saijo, Stadt / Ehime, Präfektur / Shikoku / 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

Search for minerals with similar chemistry

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

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
Volumne (Å³)	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)
	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 )

(Co-)Type locality

Japan /Shikoku /Ehime, Präfektur /Saijo, Stadt /Kurase mine

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

Related minerals "Strunz Classification" (9. Edition) [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

Pyrope	{Mg₃}[Al₂](Si₃)O₁₂ kubisch : m3m : Ia3d	9.AD.25
'Garnet supergroup'	neue Definition: {X₃}[Y₂](Z₃)φ₁₂ kubisch : kubisch-hexakisoktaedrisch	9.AD.25
Katoite	{Ca₃}[Al₂](☐₃)(OH)₁₂ kubisch : m3m : Ia3d	9.AD.25
Majorite	Mg₃(MgSi)(SiO₄)₃ kubisch	9.AD.25
'Melanite' (Var.v. Andradite)		9.AD.25
Rubinite	Ca₃Ti³⁺₂Si₃O₁₂ kubisch : m3m : Ia3d	9.AD.25
Wadalite	Ca₆Al₅Si₂O₁₆Cl₃ kubisch : 43m : I43d	9.AD.25
Almandine	{Fe²⁺₃}[Al₂](Si₃)O₁₂ kubisch : m3m : Ia3d	9.AD.25
Andradite	{Ca₃}[Fe³⁺₂](Si₃)O₁₂ kubisch : m3m : Ia3d	9.AD.25
Calderite	{Mn²⁺₃}[Fe³⁺₂](Si₃)O₁₂ kubisch : m3m : Ia3d	9.AD.25
'Hessonite' (Var.v. Grossular)	Ca₃Al₂(SiO₄)₃	9.AD.25
'Hibschite' (Var.v. Grossular)	Ca₃Al₂(SiO₄)_3-x(OH)_4*x {x<0.2-1.5} kubisch : m3m : Ia3d	9.AD.25
Kimzeyite	{Ca₃}[Zr₂](SiAl₂)O₁₂ kubisch : m3m : Ia3d	9.AD.25
Uvarovite	{Ca₃}[Cr³⁺₂](Si₃)O₁₂ kubisch : m3m : Ia3d	9.AD.25
Goldmanite	{Ca₃}[V³⁺₂](Si₃)O₁₂ kubisch : m3m : Ia3d	9.AD.25
Grossular	{Ca₃}[Al₂](Si₃)O₁₂ kubisch : m3m : Ia3d	9.AD.25
Holtstamite	{Ca₃}[Al₂](Si₂)(☐)O₈(OH)₄ tetragonal : 4/mmm : I4₁/acd	9.AD.25
Hutcheonite	{Ca₃}[Ti₂](SiAl₂)O₁₂ kubisch : m3m : Ia3d	9.AD.25
Knorringite	{Mg₃}[Cr³⁺₂](Si₃)O₁₂ kubisch : m3m : Ia3d	9.AD.25
Morimotoite	{Ca₃}[TiFe²⁺](Si₃)O₁₂ kubisch : m3m : Ia3d	9.AD.25
Schorlomite	{Ca₃}[Ti₂](SiFe³⁺₂)O₁₂ kubisch : m3m : Ia3d	9.AD.25
Spessartine	{Mn²⁺₃}[Al₂](Si₃)O₁₂ kubisch : m3m : Ia3d	9.AD.25
Momoiite	{Mn²⁺₃}[V³⁺₂](Si₃)O₁₂ kubisch : m3m : Ia3d	9.AD.25
Kerimasite	{Ca₃}[Zr₂](SiFe³⁺₂)O₁₂ kubisch : m3m : Ia3d	9.AD.25
Toturite	{Ca₃}[Sn⁴⁺₂](SiFe³⁺₂)O₁₂ kubisch : m3m : Ia3d	9.AD.25
Menzerite-(Y)	{Y₂Ca}[Mg₂](Si₃)O₁₂ kubisch : m3m : Ia3d	9.AD.25
Elbrusite	{Ca₃}[U⁶⁺_0.5Zr_1.5](Fe³⁺₃)O₁₂ kubisch : m3m : Ia3d	9.AD.25
Bitikleite	{Ca₃}[Sb⁵⁺Sn⁴⁺](Al₃)O₁₂ kubisch : m3m : Ia3d	9.AD.25
Usturite	{Ca₃}[Sb⁵⁺Zr](Fe³⁺₃)O₁₂ kubisch : m3m : Ia3d	9.AD.25
Eringaite	{Ca₃}[V³⁺₂](Si₃)O₁₂ kubisch : m3m : Ia3d	9.AD.25
Dzhuluite	{Ca₃}[Sb⁵⁺Sn⁴⁺](Fe³⁺₃)O₁₂ kubisch : m3m : Ia3d	9.AD.25
Irinarassite	{Ca₃}[Sn⁴⁺₂](SiAl₂)O₁₂ kubisch : m3m : Ia3d	9.AD.25
Eltyubyuite	Ca₁₂Fe³⁺₁₀Si₄O₃₂Cl₆ kubisch : 43m : I43d	9.AD.25
Adrianite	Ca₁₂(Al₄Mg₃Si₇)O₃₂Cl₆ kubisch : 43m : I43d	9.AD.25
Priscillagrewite-(Y)	YCa₂Zr₂Al₃O₁₂ kubisch : m3m : Ia3d	9.AD.25
'Hydroandradite' (Var.v. Andradite)	Ca₃Fe³⁺₂(SiO4)_3-x(OH)_4x	9.AD.25
'Hydrougrandite'	(Ca,Mg,Fe²⁺)₃(Fe³⁺,Al)₂(SiO₄)_3-x(OH)_4x	9.AD.25
Nikmelnikovite	Ca₁₂Fe²⁺Fe³⁺₃Al₃(SiO₄)₆(OH)₂₀ trigonal : 3 : R3	9.AD.25
Henritermierite	{Ca₃}[Mn³⁺₂](Si₂)(☐)O₈(OH)₄ tetragonal : 4/mmm : I4₁/acd	9.AD.25

Related minerals "Lapis Classification" [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

Pyrope	{Mg₃}[Al₂](Si₃)O₁₂ kubisch : m3m : Ia3d	VIII/A.08-010
Almandine	{Fe²⁺₃}[Al₂](Si₃)O₁₂ kubisch : m3m : Ia3d	VIII/A.08-020
Spessartine	{Mn²⁺₃}[Al₂](Si₃)O₁₂ kubisch : m3m : Ia3d	VIII/A.08-030
Calderite	{Mn²⁺₃}[Fe³⁺₂](Si₃)O₁₂ kubisch : m3m : Ia3d	VIII/A.08-040
Knorringite	{Mg₃}[Cr³⁺₂](Si₃)O₁₂ kubisch : m3m : Ia3d	VIII/A.08-050
Majorite	Mg₃(MgSi)(SiO₄)₃ kubisch	VIII/A.08-060
Menzerite-(Y)	{Y₂Ca}[Mg₂](Si₃)O₁₂ kubisch : m3m : Ia3d	VIII/A.08-065
Grossular	{Ca₃}[Al₂](Si₃)O₁₂ kubisch : m3m : Ia3d	VIII/A.08-070
'Hibschite' (Var.v. Grossular)	Ca₃Al₂(SiO₄)_3-x(OH)_4*x {x<0.2-1.5} kubisch : m3m : Ia3d	VIII/A.08-080
Katoite	{Ca₃}[Al₂](☐₃)(OH)₁₂ kubisch : m3m : Ia3d	VIII/A.08-090
'Hydrougrandite'	(Ca,Mg,Fe²⁺)₃(Fe³⁺,Al)₂(SiO₄)_3-x(OH)_4x	VIII/A.08-100
Andradite	{Ca₃}[Fe³⁺₂](Si₃)O₁₂ kubisch : m3m : Ia3d	VIII/A.08-110
Schorlomite	{Ca₃}[Ti₂](SiFe³⁺₂)O₁₂ kubisch : m3m : Ia3d	VIII/A.08-120
Morimotoite	{Ca₃}[TiFe²⁺](Si₃)O₁₂ kubisch : m3m : Ia3d	VIII/A.08-125
Uvarovite	{Ca₃}[Cr³⁺₂](Si₃)O₁₂ kubisch : m3m : Ia3d	VIII/A.08-130
Momoiite	{Mn²⁺₃}[V³⁺₂](Si₃)O₁₂ kubisch : m3m : Ia3d	VIII/A.08-138
Goldmanite	{Ca₃}[V³⁺₂](Si₃)O₁₂ kubisch : m3m : Ia3d	VIII/A.08-140
Eringaite	{Ca₃}[V³⁺₂](Si₃)O₁₂ kubisch : m3m : Ia3d	VIII/A.08-145
Kimzeyite	{Ca₃}[Zr₂](SiAl₂)O₁₂ kubisch : m3m : Ia3d	VIII/A.08-150
Irinarassite	{Ca₃}[Sn⁴⁺₂](SiAl₂)O₁₂ kubisch : m3m : Ia3d	VIII/A.08-175
Toturite	{Ca₃}[Sn⁴⁺₂](SiFe³⁺₂)O₁₂ kubisch : m3m : Ia3d	VIII/A.08-180
Kerimasite	{Ca₃}[Zr₂](SiFe³⁺₂)O₁₂ kubisch : m3m : Ia3d	VIII/A.08-185
Wadalite	Ca₆Al₅Si₂O₁₆Cl₃ kubisch : 43m : I43d	VIII/A.08-200
Eltyubyuite	Ca₁₂Fe³⁺₁₀Si₄O₃₂Cl₆ kubisch : 43m : I43d	VIII/A.08-205
Holtstamite	{Ca₃}[Al₂](Si₂)(☐)O₈(OH)₄ tetragonal : 4/mmm : I4₁/acd	VIII/A.08-210
Henritermierite	{Ca₃}[Mn³⁺₂](Si₂)(☐)O₈(OH)₄ tetragonal : 4/mmm : I4₁/acd	VIII/A.08-220

Related minerals "Hoelzel Classification" [Mineral | Chemical formula : Crystal system : Class (H-M) | Space Group | Indenture number]

Pyrope	{Mg₃}[Al₂](Si₃)O₁₂ kubisch : m3m : Ia3d	9.AC.100
Almandine	{Fe²⁺₃}[Al₂](Si₃)O₁₂ kubisch : m3m : Ia3d	9.AC.110
Spessartine	{Mn²⁺₃}[Al₂](Si₃)O₁₂ kubisch : m3m : Ia3d	9.AC.120
Majorite	Mg₃(MgSi)(SiO₄)₃ kubisch	9.AC.140
Calderite	{Mn²⁺₃}[Fe³⁺₂](Si₃)O₁₂ kubisch : m3m : Ia3d	9.AC.150
Knorringite	{Mg₃}[Cr³⁺₂](Si₃)O₁₂ kubisch : m3m : Ia3d	9.AC.160
Momoiite	{Mn²⁺₃}[V³⁺₂](Si₃)O₁₂ kubisch : m3m : Ia3d	9.AC.170

CNMNC (IMA)-Number

IMA 2009-026

CNMNC symbol

Symbol

Mom

Automatic Links to external internet sources (Responsibility is with the operator)

German pages	DeWikiPedia - search for: Momoiit Google-Bilder-Suche - search for: Momoiit Mineralogisch-Petrographisches-Institut Hamburg - search for: Momoiit
English pages	Mindat - search for: Momoiite Webmineral - search for:Momoiite Handbook-of-Mineralogy - search for: Momoiite RRUFF - Raman, XRD and other mineral data - search for: Momoiite RRUFF - References and PDF downloads - search for: Momoiite American-Mineralogist-Crystal-Structure-Database - search for: Momoiite Athena - search for: Momoiite Strahlen.org - search for: Momoiite Mineralienatls.de (Forum) - search for: Momoiit
Russian pages	Webmineral.ru - search for: Момоиит

Mineral Dealer

German pages

hausen - Mineralgroßhandel - search for: Momoiit
Crystal-Treasure.com - search for: Momoiit
Bosse - search for: Momoiit
Edelsteine Neuburg - Gundolf Fischer - search for: Momoiit