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Ominelite

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Ominelit
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Ominelit
blaugraues Aggregat von Ominelit, Fluss Misen, Omine Berge, Tenkawa, Yoshino, Honshu, Japan; BB < 5 mm
Copyright: MinTreasure.com (Carsten Slotta); Contribution: openpit
Location: Japan/Honshū (Honschu), Insel/Kinki, Region (Kansai Zweckverband)/Nara, Präfektur/Yoshino, Landkreis/Tenkawa/Misen
Mineral: Ominelite
Image: 1633624345
License: Usage for Mineralienatlas project only
Ominelit

blaugraues Aggregat von Ominelit, Fluss Misen, Omine Berge, Tenkawa, Yoshino, Honshu, Japan; BB < 5 mm
Copyright: MinTreasure.com (Carsten Slotta)
Contribution: openpit 2021-10-07
Locality: Misen / Tenkawa / Yoshino, Landkreis / Nara, Präfektur / Kinki, Region (Kansai Zweckverband) / Honshū (Honschu), Insel / Japan

Collectors Summary

Hardness (Mohs) 7
Cleavages keine
Crystal System orthorhombisch, Pbnm

Chemism

Chemical formula

(Fe2+,Mg)Al3[O|BO4|SiO4]

Chemical composition

Aluminium, Eisen, Magnesium, Silicium, Bor, Sauerstoff

Unit weight: 311.7968796 u; Number of atoms in the formula: 15

Info

Empirical formula:

(Fe0.75Mg0.25)Al3[OBO4SiO4]

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Boron

B

3.47

1

6.67

10.8117000

10.8117000
Oxygen

O

46.18

9

60.00

15.9994300

143.9948700
Magnesium

Mg

1.95

0.25

1.67

24.3050600

6.0762650
Aluminium

Al

25.96

3

20.00

26.9815382

80.9446146
Silicon

Si

9.01

1

6.67

28.0855300

28.0855300
Iron

Fe

13.43

0.75

5.00

55.8452000

41.8839000

Analysis wt%

SiO2 : 19.34, B2O3 : 10.91, Al2O3 : 48.85, FeO : 19.37, MgO : 1.33, MnO : 0.43 (Ref: AM2002)

Strunz 9th edition incl. updates

9.AJ.05

9: Silikate (Germanate)
A: Inselsilikate (Nesosilikate)
J: Insel(Neso)silikate mit BO3 Triangeln und /oder B[4], Be[4] Tetraedern, eckenteilend mit SiO4
05:Grandidierit-Gruppe

Lapis Classification

VIII/B.31-042

VIII: SILIKATE
B: Inselsilikate mit tetraederfremden Anionen
31: Kationen mit Koordinationszahlen zwischen [8] und [12]; Beryllium- und Bor-Inselsilikate

Classification by Hölzel

9.AK.145

9: SILICATES
A: Nesosilicates
K: Boro and Beryllo Nesosilicates
1: C small; Dumortierite-Kornerupine-Group

Dana 8th edition

54.01.01.02

54: Nesosilicates Nesosilicate Borosilicates and Some Beryllosilicates
01: Nesosilicates Nesosilicate Borosilicates and Some Beryllosilicates with (BO3)
01: Grandidierite Group

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

max. Birefringence

0.025
Birefringence chart\! Ominelite title=Birefringence chart Ominelite

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

1.631

RI value β

1.654

RI value γ / ε

1.656

Ri mean

1.647

2V angle

Biaxial (-) 32°

Crystallography

Crystal System

orthorhombisch

Class (H-M)

mmm

Space Group number

62

Space Group

Pbnm

Cell parameters a (Å)

10.343

Cell parameters b (Å)

11.095

Cell parameters c (Å)

5.760

Cell parameters a/b or c/a

0.932

Cell parameters c/b

0.519

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

4

Volume (ų)

660.992

X-Ray Powder Diffraction

5.57(50),
5.21(100),
3.73(50),
3.51(50),
2.97(80),
2.79(80),
2.18(80)
XRD chart Ominelite

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

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

7

VHN (Hardness Vickers)

1300 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

3.169 (berechnet)

3.133 ( ρ calc. Mineralienatlas )

Cleavages

keine

(Co-)Type locality

(Co-)Type locality

Japan/Honshū (Honschu), Insel/Kinki, Region (Kansai Zweckverband)/Nara, Präfektur/Yoshino, Landkreis/Tenkawa/Misen

Preface

Author (Name, Year)

Hiroi & Grew & Motoyoshi & Peacor & Rouse & Matsubara & Yokoyama & Miy

References

American Mineralogist 87 (2001), 160

Other languages

German

Ominelit

Spanish

Ominelita

French

Ominelite

English

Ominelite

Russian

Оминелит

CNMNC (IMA)-Number

IMA 1999-025

CNMNC symbol

Symbol

Omi

Locations with GPS information

IDs

GUSID (Global unique identifier short form) co0J-gWakE--jrErQImz2w
GUID (Global unique identifier) FA098D72-9A05-4F90-BE8E-B12B4089B3DB
Database ID 2825