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Laihunite

Pictures (2 Images total)

Laihunit auf Fayalit
Views (Image: 1253718388): 1957
Laihunit auf Fayalit

Bildbreite: 2 mm; Fundort: Obsidian Cliffs, North Sister Mountain, McKenzie Pass, Lane Co., Oregon, USA

Copyright: Stephan Wolfsried
Contribution: Hg 2009-09-23
Locality: Obsidian Cliffs / North Sister Mountain / McKenzie Pass / Lane Co. / Oregon / USA
Laihunit
Views (Image: 1254465215): 1548
Laihunit

Bildbreite: 2 mm; Fundort: Stbr. Caspar, Ettringer Bellerberg, Ettringen, Eifel, Deutschland

Copyright: Stephan Wolfsried
Contribution: Hg 2009-10-02
Locality: Ettringer Bellerberg (Stbr. Caspar) / Bellerberg / Ettringen / Mayen / Mayen-Koblenz-Kreis / Rheinland-Pfalz / Deutschland

Collectors Summary

Color dunkelbraun, schwarz
Streak color hellbraun
Lustre Metallglanz
Hardness (Mohs) 6
Cleavages {001} gut, {100} vollkommen, {010} vollkommen
Crystal System monoklin, P21/a

Chemism

Chem­ical formula

Fe2+Fe3+2(SiO4)2

Empir­ical formula (anal­y­sis)

(Fe2+1.18Mg0.08)Fe3+2(Si0.93O4)2

Addi­tional chem. informa­tion

Formel laut CNMNC (Jun. 2013): (Fe3+,Fe2+,☐)2(SiO4)

Chem­ical com­po­si­tion

Eisen, Silicium, Sauerstoff

Unit weight: 359.7666666 u; Number of atoms in the formula: 13.12

Info

Empirical formula:

(Fe1.18Mg0.08)Fe2(Si0.93O4)2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Oxygen

O

35.58

8

60.98

15.9994300

127.9954400

Magnesium

Mg

0.54

0.08

0.61

24.3050600

1.9444048

Silicon

Si

14.52

1.86

14.18

28.0855300

52.2390858

Iron

Fe

49.36

3.18

24.24

55.8452000

177.5877360

Strunz 9th edi­tion incl. updates

9.AC.05

9: Silikate (Germanate)
A: Inselsilikate (Nesosilikate)
C: Insel(Neso)silikate ohne weitere Anionen; Kationen in oktahedraler [6] Koordination
05:Olivin-Gruppe

Lapis Clas­sifica­tion

VIII/A.04-050

VIII: SILIKATE
A: Inselsilikate mit [SiO4] 4--Baugruppen
4: Kationen in oktaedrischer Koordination [6]; Olivin-Gruppe

Clas­sifica­tion by Hölzel

9.AB.510

9: SILICATES
A: Nesosilicates
B: Olivine-Group

IMA sta­tus

anerkannt

Min­eral sta­tus

anerkanntes Mineral

Optical Properties

Color

dunkelbraun, schwarz

Streak color

hellbraun

Diaphane­ity (Trans­parency)

opak

Lus­tre

Metallglanz

Reflec­tiv­ity: (Lambda nm) ↓, ↑, Ø

(470) -, -, -
(546) 13.4, -, 13.4
(589) 12.4, -, 12.4
(650) 12.4, -, 12.4

Reflection chart Laihunite

Reflec­tiv­ity Ø

12.73

Crystallography

Crystal Sys­tem

monoklin

Class (H-M)

2/m

Space Group number

14

Space Group

P21/a

Cell param­e­ters a (Å)

10.21

Cell param­e­ters b (Å)

4.812

Cell param­e­ters c (Å)

5.813

Cell param­e­ters a/b or c/a

2.122

Cell param­e­ters c/b

1.208

Cell param­e­ters α

90°

Cell param­e­ters β

90.87°

Cell param­e­ters γ

90°

Z

2

Volumne (ų)

285.563

X-Ray Pow­der Diffrac­tion

3.78(60),
3.47(90),
2.78(80),
2.520(100),
2.405(60),
2.260(50),
1.750(70)

XRD chart Laihunite

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

Polytypes

Laihunite-3M

0.4Fe2+0.8Fe3+0.8SiO4

monoklin

P21/b

2/m

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hard­ness (Mohs)

6

Density (g/cm³)

3.967 (gemessen) 4.11 (berechnet)

4.184 ( ρ calc. Mineralienatlas )

Cleav­ages

{001} gut, {100} vollkommen, {010} vollkommen

Preface

Author (Name, Year)

Laihunite Research Group / China, 1976

References

American Mineralogist 62 (1977), 1058.

Mineralogical Journal (Tokyo) 11 (1983), 382.

Acta Crystallographica B42 (1986), 17.

American Mineralogist 71 (1986), 1455-1460.

Handbook of Mineralogy (Anthony u. w.), 2 (1995), 445.

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

'Olivine group'

Mg1.6Fe2+0.4(SiO4)

orthorhombisch : 2/m 2/m 2/m

9.AC.05

Fayalite

Fe22+SiO4

orthorhombisch : mmm : Pbnm

9.AC.05

Laihunite

Fe2+Fe3+2(SiO4)2

monoklin : 2/m : P21/a

9.AC.05

Tephroite

Mn2SiO4

orthorhombisch : mmm : Pbnm

9.AC.05

Forsterite

Mg2SiO4

orthorhombisch : mmm : Pbnm

9.AC.05

Glaucochroite

CaMnSiO4

orthorhombisch : mmm : Pbnm

9.AC.05

'Laihunite-3M' (Pol.v. Laihunite)

0.4Fe2+0.8Fe3+0.8SiO4

monoklin : 2/m : P21/b

9.AC.05

Liebenbergite

(Ni,Mg)2SiO4

orthorhombisch : mmm : Pbnm

9.AC.05

Kirschsteinite

CaFe2+SiO4

orthorhombisch : mmm : Pmnb

9.AC.05

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

Forsterite

Mg2SiO4

orthorhombisch : mmm : Pbnm

VIII/A.04-010

Fayalite

Fe22+SiO4

orthorhombisch : mmm : Pbnm

VIII/A.04-020

Tephroite

Mn2SiO4

orthorhombisch : mmm : Pbnm

VIII/A.04-030

Liebenbergite

(Ni,Mg)2SiO4

orthorhombisch : mmm : Pbnm

VIII/A.04-040

Laihunite

Fe2+Fe3+2(SiO4)2

monoklin : 2/m : P21/a

VIII/A.04-050

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

'Laihunite-3M' (Pol.v. Laihunite)

0.4Fe2+0.8Fe3+0.8SiO4

monoklin : 2/m : P21/b

9.AB.500

Laihunite

Fe2+Fe3+2(SiO4)2

monoklin : 2/m : P21/a

9.AB.510

Alternative Name

Ferrifayalit

Ferrifayalita

Ferrifayalite

German

Laihunit-1M

Laihunita

English

Laihunite-1M

CNMNC symbol

Symbol

Lai

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

German pages

DeWikiPedia - search for: Laihunit
Google-Bilder-Suche - search for: Laihunit
Mineralogisch-Petrographisches-Institut Hamburg - search for: Laihunit

English pages

Mindat - search for: Laihunite
Webmineral - search for:Laihunite
Handbook-of-Mineralogy - search for: Laihunite
RRUFF - Raman, XRD and other mineral data - search for: Laihunite
RRUFF - References and PDF downloads - search for: Laihunite
American-Mineralogist-Crystal-Structure-Database - search for: Laihunite
Athena - search for: Laihunite

Russian pages

Webmineral.ru - search for: Лайхунит

Mineral Dealer

German pages

hausen - Mineralgroßhandel - search for: Laihunit
Crystal-Treasure.com - search for: Laihunit
Bosse - search for: Laihunit

Locations with GPS information




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