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Forsterite (Forsterit)

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Survey map (201)
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Pictures (87 Images total)

Views (File:

1163776091

): 10655, Rating: 9

Forsterit
Bildbreite: 1,5 mm; Fundort: Wannenköpfe, Ochtendung, Eifel, Rheinland-Pfalz, Deutschland
Copyright: Fred Kruijen; Contribution: Fred Kruijen
Location: Deutschland/Rheinland-Pfalz/Mayen-Koblenz-Kreis/Maifeld, Verbandsgemeinde/Ochtendung/Wannenköpfe
Mineral: Forsterite
Image: 1163776091
Rating: 9 (votes: 7)
License: Usage for Mineralienatlas project only

Original size - Additional info - Insert picture into forum - Discussion

Forsterit

Bildbreite: 1,5 mm; Fundort: Wannenköpfe, Ochtendung, Eifel, Rheinland-Pfalz, Deutschland

Fred Kruijen

Contribution: Fred Kruijen 2006-11-17

Locality: Wannenköpfe / Ochtendung / Maifeld, Verbandsgemeinde / Mayen-Koblenz-Kreis / Rheinland-Pfalz / Deutschland

Views (File:

1359313855

): 5143, Rating: 9

Forsterit
Blockige gelbgrüne Kristalle, BB = 3,8 mm, Fundort: Stbr. Caspar, Ettringer Bellerberg, Ettringen, Eifel, Deutschland.
Copyright: Bebo; Contribution: Münchener Micromounter
Collection: Lithothek der Münchener Micromounter, Collection number: A000925, Donator: Willi Schüller
Location: Deutschland/Rheinland-Pfalz/Mayen-Koblenz-Kreis/Vordereifel, Verbandsgemeinde/Ettringen/Bellerberg/Ettringer Bellerberg (Stbr. Caspar)
Mineral: Forsterite
Image: 1359313855
Rating: 9 (votes: 5)
License: Usage for Mineralienatlas project only

Original size - Additional info - Insert picture into forum - Discussion

Forsterit (SNr: A000925)

Blockige gelbgrüne Kristalle, BB = 3,8 mm, Fundort: Stbr. Caspar, Ettringer Bellerberg, Ettringen, Eifel, Deutschland.

Collection:

Lithothek der Münchener Micromounter

Bebo

Contribution: Münchener Micromounter 2013-01-27

Locality: Ettringer Bellerberg (Stbr. Caspar) / Bellerberg / Ettringen / Vordereifel, Verbandsgemeinde / Mayen-Koblenz-Kreis / Rheinland-Pfalz / Deutschland

Views (File:

1174918865

): 11089, Rating: 9

Forsterit
Bildbreite: 3 mm; Fundort Stbr. Caspar, Ettringer Bellerberg, Ettringen, Mayen, Eifel
Copyright: Stephan Wolfsried; Contribution: Hg
Location: Deutschland/Rheinland-Pfalz/Mayen-Koblenz-Kreis/Vordereifel, Verbandsgemeinde/Ettringen/Bellerberg/Ettringer Bellerberg (Stbr. Caspar)
Mineral: Forsterite
Image: 1174918865
Rating: 9 (votes: 4)
License: Usage for Mineralienatlas project only

Original size - Additional info - Insert picture into forum - Discussion

Forsterit

Bildbreite: 3 mm; Fundort Stbr. Caspar, Ettringer Bellerberg, Ettringen, Mayen, Eifel

Stephan Wolfsried

Contribution: Hg 2007-03-26

Locality: Ettringer Bellerberg (Stbr. Caspar) / Bellerberg / Ettringen / Vordereifel, Verbandsgemeinde / Mayen-Koblenz-Kreis / Rheinland-Pfalz / Deutschland

Views (File:

1255428890

): 6144

Forsterit
Bildbreite: 3 mm; Fundort: Nickenicher Weinberg (Sattelberg), Nickenich, Eifel, Rheinland-Pfalz, Deutschland
Copyright: Stephan Wolfsried; Contribution: Hg
Location: Deutschland/Rheinland-Pfalz/Mayen-Koblenz-Kreis/Pellenz, Verbandsgemeinde/Nickenich/Nickenicher Weinberg (Sattelberg)
Mineral: Forsterite
Image: 1255428890
Rating: 8.67 (votes: 3)
License: Usage for Mineralienatlas project only

Original size - Additional info - Insert picture into forum - Discussion

Forsterit

Bildbreite: 3 mm; Fundort: Nickenicher Weinberg (Sattelberg), Nickenich, Eifel, Rheinland-Pfalz, Deutschland

Stephan Wolfsried

Contribution: Hg 2009-10-13

Locality: Nickenicher Weinberg (Sattelberg) / Nickenich / Pellenz, Verbandsgemeinde / Mayen-Koblenz-Kreis / Rheinland-Pfalz / Deutschland

Views (File:

1256716433

): 6291

Forsterit
Größe: bis 2,07 mm; Fundort: Monte Somma, Somma-Vesuv-Komplex, Neapel, Kampanien (Campania), Italien
Copyright: Matteo Chinellato; Contribution: Hg
Location: Italien/Kampanien (Campania), Region/Neapel, Provinz/Somma-Vesuv-Komplex/Monte Somma
Mineral: Forsterite
Image: 1256716433
Rating: 8.67 (votes: 3)
License: Usage for Mineralienatlas project only

Original size - Additional info - Insert picture into forum - Discussion

Forsterit

Größe: bis 2,07 mm; Fundort: Monte Somma, Somma-Vesuv-Komplex, Neapel, Kampanien (Campania), Italien

Matteo Chinellato

Contribution: Hg 2009-10-28

Locality: Monte Somma / Somma-Vesuv-Komplex / Neapel, Provinz / Kampanien (Campania), Region / Italien

Views (File:

1166734455

): 3293

Forsterit
Bildbreite: 3 mm; Fundort Emmelberg, Üdersdorf, Eifel, Rheinland-Pfalz, Deutschland
Copyright: Stephan Wolfsried; Contribution: Hg
Location: Deutschland/Rheinland-Pfalz/Vulkaneifel, Landkreis/Daun/Üdersdorf/Emmelberg
Mineral: Forsterite
Image: 1166734455
Rating: 8.5 (votes: 2)
License: Usage for Mineralienatlas project only

Original size - Additional info - Insert picture into forum - Discussion

Forsterit

Bildbreite: 3 mm; Fundort Emmelberg, Üdersdorf, Eifel, Rheinland-Pfalz, Deutschland

Stephan Wolfsried

Contribution: Hg 2006-12-21

Locality: Emmelberg / Üdersdorf / Daun / Vulkaneifel, Landkreis / Rheinland-Pfalz / Deutschland

More images

You find additional specimen at the Geolitho Museum

Collectors Summary

Color

farblos, grün, gelb, rot, gelbgrün, weiß, schwarz, schwarzgrün

Streak color

weiß

Hardness (Mohs)

Solubility

+++ Säuren

Crystal System

orthorhombisch, Pbnm

Chemism

Chemical formula

Mg₂SiO₄

Chemical composition

Magnesium, Silicium, Sauerstoff

Unit weight: 140.69337 u; Number of atoms in the formula: 7

Info

Empirical formula:

Mg₂SiO₄

Element	Symbol	Weight%	Atoms	Atoms%	Atom weight (u)	Sum weight (u)
Oxygen	O	45.49	4	57.14	15.9994300	63.9977200
Magnesium	Mg	34.55	2	28.57	24.3050600	48.6101200
Silicon	Si	19.96	1	14.29	28.0855300	28.0855300

Search for minerals with similar chemistry

Analysis wt%

SiO₂ : 40.70, Al₂O₃ : 0.60, Fe₂O₃ : 1.60, FeO : 4.47, MgO : 51.84, H₂O : 0.51 (Ref: Doklady Akademiia Nauk, SSSR 47)

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.04-010

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

Classification by Hölzel

9.AB.100

9: SILICATES
A: Nesosilicates
B: Olivine-Group

Dana 8th edition

51.03.01.02

51: Nesosilicate Minerals
03: Nesosilicates Nesosilicate Insular SiO4 Groups Only with all cations in octahedral [6] coordination
01: Olivine group

IMA status

Erstbeschreibung vor CNMNC-Gründung (1959), als Mineral meist anerkannt

Mineral status

anerkanntes Mineral

IMA Classification

Olivine group

Optical Properties

Color	farblos, grün, gelb, rot, gelbgrün, weiß, schwarz, schwarzgrün
Streak color	weiß
Diaphaneity (Transparency)	transparent
max. Birefringence	0.035
	$Birefringence chart\! Forsterite title=Birefringence chart Forsterite$ 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	1.635
RI value β	1.651
RI value γ / ε	1.670
Ri mean	1.652
2V angle	Biaxial (+) 82°

Optical Data Luminescence

Color LW-UV (365nm)	gelblich weiß
Color SW-UV (254nm)	gelblich weiß
LW-UV Other Colors	blassgelb, gelblich
SW-UV Other Colors	blassgelb, gelblich
Most Common Activator	Mn²⁺
Other Activators	Cr³⁺, Fe³⁺, O^*
Afterglow (Persistant Luminescence)	keine Daten
Thermoluminescence	vorhanden

Crystallography

Crystal System	orthorhombisch
Class (H-M)	mmm
Space Group number	62
Space Group	Pbnm
Cell parameters a (Å)	4.756
Cell parameters b (Å)	10.195
Cell parameters c (Å)	5.981
Cell parameters a/b or c/a	0.467
Cell parameters c/b	0.587
Cell parameters α	90°
Cell parameters β	90°
Cell parameters γ	90°
Z	4
Volumne (Å³)	290.003
X-Ray Powder Diffraction	3.881(80), 2.765(70), 2.510(80), 2.457(100), 2.267(60), 2.247(40), 1.748(70), 1.478(30)
	Calculated from d-spacing and intensity at 0.1541838 nm (Cu)

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)	7
VHN (Hardness Vickers)	1300 (ungefähre Angabe abgeleitet aus der Mohshärte)
Density (g/cm³)	3.21 - 3.33 / Durchschnittlich = 3.27
	3.222 ( ρ calc. Mineralienatlas )
Melting point °C	Liquidus: 1890°C, Solidus im binäres System mit Åkermanit 1440 °C , Leucit: 1493°C, im ternäres System mit Åkermanit, Leucit: 1286°C, Åkermanit, Anorthit : 1250°C. (nach Deer, Howie, Zussman), Forsterite mit Schmelzpunkt 1890°C bei Wikipedia (en)
Instability	+++ Säuren

(Co-)Type locality

Italien /Kampanien (Campania), Region /Neapel, Provinz /Somma-Vesuv-Komplex /Monte Somma

Preface

Rareness	Als reiner Forsterit selten, die Olivin-Mischserie mit Fayalit ist regulärer Gemengebestandteil in Magmatiten.
Author (Name, Year)	Lévy, 1824
Additional Information	Benannt nach dem englischen Mineraliensammler- und Händler Adolarius Jacob Forster (1739-1806).

External links

Forsterite mit Schmelzpunkt 1890°C bei Wikipedia (en)

References

Handbook of Mineralogy (Anthony et al.), 2 (1995), 262

IMA group assignments

Olivine group Mg_1.6Fe²⁺_0.4(SiO₄) orthorhombisch Calcio-olivine Ca₂SiO₄ orthorhombisch Pnma Fayalite Fe₂²⁺SiO₄ orthorhombisch Pbnm Forsterite Mg₂SiO₄ orthorhombisch Pbnm Monticellite CaMgSiO₄ orthorhombisch Pbnm Tephroite Mn₂SiO₄ orthorhombisch Pbnm
Refresh list	Actuality: 22. Sep 2023 - 04:48:21

Other languages

German	Forsterit
Spanish	Forsterita
English	Forsterite
French	Forsterite
Russian	Форстерит
Traditional Chinese	鎂橄欖石
Simplified Chinese	镁橄榄石

Alternative Name

German	Abendsmaragd	László 247 (1995)
	Boltonit
	Boltonita
	Boltonite
	Peridoto Bianco
	White Olivine

CNMNC symbol

Symbol

Rock part of

Rocks igneous rocks and sediments crystalline igneous rocks exotic crystalline rocks lamproite olivine-diopside-richterite-madupitic lamproite jumillite normal crystalline rocks coarse-grained crystalline rocks gabbroic-rock gabbro (group) gabbro (s.s.) allivalite fine-grained crystalline rocks foiditic-rock foidite nephelinite Melilith-Nephelinit
Refresh list \| View legend Hint - Essential mineral - Important for the classification of the rock. - Accessory or non-essential mineral - this minerals are common, sometimes major part of, but are not always present.	Actuality: 22. Sep 2023 - 04:48:21

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

German pages	DeWikiPedia - search for: Forsterit Google-Bilder-Suche - search for: Forsterit Mineralienatlas.de (Forum) - search for: Forsterit
English pages	RRUFF - References and PDF downloads - search for: Forsterite American-Mineralogist-Crystal-Structure-Database - search for: Forsterite Mindat - search for: Forsterite Webmineral - search for: Forsterite Handbook-of-Mineralogy - search for: Forsterite RRUFF - Raman, XRD and other mineral data - search for: Forsterite Strahlen.org - search for: Forsterite
Russian pages	Webmineral.ru - search for: Форстерит

Mineral Dealer

German pages

hausen - Mineral Wholesale - search for: Forsterit
Crystal-Treasure.com - search for: Forsterit
Bosse - Minerals and accessories - search for: Forsterit
Edelsteine Neuburg - Gundolf Fischer - search for: Forsterit
Geolitho Marketplace, by and for collectors - search for: Forsterit

Locations with GPS information

IDs

GUSID (Global unique identifier short form)	Z-Px2uhiZk2LXpAAtTX_8g
GUID (Global unique identifier)	DAF1E367-62E8-4D66-8B5E-9000B535FFF2
Database ID	1267

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Forsterite (Forsterit)

You find additional specimen at the Geolitho Museum

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