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Ferrosilite (Ferrosilit)

Pictures (7 Images total)

Ferrosilit
Views (File:
1292274382
): 5595
Ferrosilit
Hellbraune nadelige Kristalle auf Magnetit; BB = 1 mm. Fundort: Mount Tarawera, Rotorua, Bay of Plenty Region, North Island, Neuseeland.
Copyright: Hannes Osterhammer; Contribution: Münchener Micromounter
Collection: Lithothek der Münchener Micromounter, Collection number: B001932, Donator: Ron Keene
Location: Neuseeland/North Island/Bay of Plenty, Region/Rotorua/Mount Tarawera
Mineral: Ferrosilite
Image: 1292274382
Rating: 8.5 (votes: 2)
License: Usage for Mineralienatlas project only
Ferrosilit (SNr: B001932)

Hellbraune nadelige Kristalle auf Magnetit; BB = 1 mm. Fundort: Mount Tarawera, Rotorua, Bay of Plenty Region, North Island, Neuseeland.
Collection: Lithothek der Münchener Micromounter
Copyright: Hannes Osterhammer
Contribution: Münchener Micromounter 2010-12-13
Locality: Mount Tarawera / Rotorua / Bay of Plenty, Region / North Island / Neuseeland
Ferrosilit
Views (File:
1292273254
): 5034
Ferrosilit
Hellbraune nadelige Kristalle; BB = ca. 7 mm. Fundort: Tarawera Rift, Rotorua, Bay of Plenty Region, North Island, Neuseeland.
Copyright: Hannes Osterhammer; Contribution: Münchener Micromounter
Collection: Lithothek der Münchener Micromounter, Collection number: A009220, Donator: Ron Keene
Location: Neuseeland/North Island/Bay of Plenty, Region/Rotorua/Mount Tarawera
Mineral: Ferrosilite
Image: 1292273254
Rating: 5 (votes: 1)
License: Usage for Mineralienatlas project only
Ferrosilit (SNr: A009220)

Hellbraune nadelige Kristalle; BB = ca. 7 mm. Fundort: Tarawera Rift, Rotorua, Bay of Plenty Region, North Island, Neuseeland.
Collection: Lithothek der Münchener Micromounter
Copyright: Hannes Osterhammer
Contribution: Münchener Micromounter 2010-12-13
Locality: Mount Tarawera / Rotorua / Bay of Plenty, Region / North Island / Neuseeland
Ferrosilit
Views (File:
1318405292
): 4969
Ferrosilit
Bellerberg, BB: 2,9 mm; langtafelige, gelblich-braune Kristalle
Copyright: Hannes Osterhammer; Contribution: Münchener Micromounter
Collection: Lithothek der Münchener Micromounter, Collection number: A020342, Donator: Manfred Seitz
Location: Deutschland/Rheinland-Pfalz/Mayen-Koblenz-Kreis/Vordereifel, Verbandsgemeinde/Ettringen/Bellerberg/Ettringer Bellerberg (Stbr. Caspar)
Mineral: Ferrosilite
Image: 1318405292
License: Usage for Mineralienatlas project only
Ferrosilit (SNr: A020342)

Bellerberg, BB: 2,9 mm; langtafelige, gelblich-braune Kristalle
Collection: Lithothek der Münchener Micromounter
Copyright: Hannes Osterhammer
Contribution: Münchener Micromounter 2011-10-12
Locality: Ettringer Bellerberg (Stbr. Caspar) / Bellerberg / Ettringen / Vordereifel, Verbandsgemeinde / Mayen-Koblenz-Kreis / Rheinland-Pfalz / Deutschland
Ferrosilit, Magnetit
Views (File:
1401828744
): 3211
Ferrosilit, Magnetit
Grüner Ferrosilit in prismatischen Kristallen mit Längsstreifung. Daneben Magnetit und bernsteinfarbene Kristalle eines unbestimmten Minerals, wahrscheinlich Fayalit oder Tephroit. Die Matrix ist ein alterierter Vulkanit. Iodake Vulkan, Satsuma-Iojima, Japan. Bildausschnitt 2,1x1,6mm.
Copyright: aca; Contribution: aca
Collection: aca
Location: Japan/Kyūshū (Kyushu), Insel/Kagoshima, Präfektur/Iou-Jima (Iwo-Jima, Satsuma-Iwojima), Insel
Mineral: Ferrosilite
Image: 1401828744
License: Usage for Mineralienatlas project only
Ferrosilit, Magnetit

Grüner Ferrosilit in prismatischen Kristallen mit Längsstreifung. Daneben Magnetit und bernsteinfarbene Kristalle eines unbestimmten Minerals, wahrscheinlich Fayalit oder Tephroit. Die Matrix ist e...
Collection: aca
Copyright: aca
Contribution: aca 2014-06-03
Locality: Iou-Jima (Iwo-Jima, Satsuma-Iwojima), Insel / Kagoshima, Präfektur / Kyūshū (Kyushu), Insel / Japan
Ferrosilit
Views (File:
1696346286
): 76
Ferrosilit
Spitztaflige, teilweise verzwillingte Ferrosilitkristalle vom Steinbruch Caspar am Bellerberg in der Eifel. Bildhöhe etwa 2,5 mm.
Copyright: Klaus Schäfer; Contribution: Klaus Schäfer
Collection: Klaus Schäfer, Collection number: E-BB-OrPy-2-1-1
Location: Deutschland/Rheinland-Pfalz/Mayen-Koblenz-Kreis/Vordereifel, Verbandsgemeinde/Ettringen/Bellerberg/Ettringer Bellerberg (Stbr. Caspar)
Mineral: Ferrosilite
Image: 1696346286
License: Usage for Mineralienatlas project only
Ferrosilit (SNr: E-BB-OrPy-2-1-1)

Spitztaflige, teilweise verzwillingte Ferrosilitkristalle vom Steinbruch Caspar am Bellerberg in der Eifel. Bildhöhe etwa 2,5 mm.
Collection: Klaus Schäfer
Copyright: Klaus Schäfer
Contribution: Klaus Schäfer 2023-10-03
Locality: Ettringer Bellerberg (Stbr. Caspar) / Bellerberg / Ettringen / Vordereifel, Verbandsgemeinde / Mayen-Koblenz-Kreis / Rheinland-Pfalz / Deutschland

You find additional specimen at the Geolitho Museum

Collectors Summary

Color farblos, grün, dunkelbraun, fast schwarz
Streak color blass bräunlich grau
Hardness (Mohs) 5.5
Crystal System orthorhombisch, Pbca

Chemism

Chemical formula

(Fe2+,Mg)2Si2O6

Chemical composition

Eisen, Magnesium, Silicium, Sauerstoff

Unit weight: 248.08797 u; Number of atoms in the formula: 10

Info

Empirical formula:

(Fe0.75Mg0.25)2Si2O6

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Oxygen

O

38.69

6

60.00

15.9994300

95.9965800
Magnesium

Mg

4.90

0.5

5.00

24.3050600

12.1525300
Silicon

Si

22.64

2

20.00

28.0855300

56.1710600
Iron

Fe

33.77

1.5

15.00

55.8452000

83.7678000

Analysis wt%

SiO2 : 45.65, MgO : 2.48, FeO : 49.28, MnO : 0.72, CaO : 0.79 (Ref: American Mineralogist 78)

Strunz 9th edition incl. updates

9.DA.05

9: Silikate (Germanate)
D: Ketten- und Bandsilikate (Inosilikate)
A: Ketten- und Bandsilikate mit 2 periodischen Ketten SiO6; Pyroxen-Familie
05:Orthopyroxene

Lapis Classification

VIII/F.02-020

VIII: SILIKATE
F: Ketten- und Bandsilikate
2: Zweierketten [Si2O6] 4-; Pyroxen-Gruppe; Orthopyroxene

Classification by Hölzel

9.DE.150

9: SILICATES
D: Inosilicates; ~[Si2O6]4--...2-Chain
E: Orthorhombic Pyroxenes and Pyroxenoides
1: Enstatite-Group

Dana 8th edition

65.01.02.02

65: Inosilicate Minerals
01: Inosilicates Inosilicate Single-Width Unbranched Chains, W=1 with chains P=2
02: Orthopyroxenes

IMA status

Mit Anerkennung der CNMNC umbenannt

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

 Pyroxene group  ⇒ Orthopyroxene group

Optical Properties

Color

farblos, grün, dunkelbraun, fast schwarz

Streak color

blass bräunlich grau

Diaphaneity (Transparency)

durchscheinend bis opak

max. Birefringence

0.018
Birefringence chart\! Ferrosilite title=Birefringence chart Ferrosilite

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

1.762

RI value β

1.767

RI value γ / ε

1.780

Ri mean

1.770

2V angle

Biaxial (+) 73°!!

Crystallography

Crystal System

orthorhombisch

Class (H-M)

mmm

Space Group number

61

Space Group

Pbca

Cell parameters a (Å)

18.418

Cell parameters b (Å)

9.078

Cell parameters c (Å)

5.243

Cell parameters a/b or c/a

2.029

Cell parameters c/b

0.578

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

8

Volume (ų)

876.622

X-Ray Powder Diffraction

6.468(90),
4.608(100),
3.234(90),
2.995(80),
2.910(100),
2.595(100),
2.521(90),
2.136(70)
XRD chart Ferrosilite

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)

5.5

VHN (Hardness Vickers)

530 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

3.88 - 4.02 / Durchschnittlich = 3.95

3.759 ( ρ calc. Mineralienatlas )

(Co-)Type locality

(Co-)Type locality

Nigeria/Bauchi, State

Preface

Author (Name, Year)

Bowen, 1935

Additional Information

Danylo Zherebetskyy, Georg Amthauer, Michael Grodzicki: Electronic and magnetic structure of pyroxenes: II. Orthoferrosilite. Physics and Chemistry of Minerals 37 (2010) S.455 - 464.

References

Mineralogical Magazine 52 (1988), 535

IMA group assignments

 
Pyroxene group
 
 
 

 
 
Orthopyroxene group
 
 
 

 
 
 
Donpeacorite
(Mn,Mg)MgSi2O6
orthorhombisch
Pbca

 
 
 
Enstatite
Mg2Si2O6
orthorhombisch
Pbca

 
 
 
Ferrosilite
(Fe2+,Mg)2Si2O6
orthorhombisch
Pbca

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Actuality: 15. Sep 2024 - 16:00:47

Other languages

German

Ferrosilit

Spanish

Ferrosilita

English

Ferrosilite

French

Ferrosilite

Russian

Ферросилит

Simplified Chinese

低铁透辉石

Japanese

鉄珪輝石

Simplified Chinese

铁辉石

Alternative Name

German

Eisenhypersthen

German

Eulit

Eulite

German

Eulysit

Eulysite

Ferrohypersthene

German

O-ferrosilit

O-ferrosilite

English

Orthoferrosilite

Japanese

ｵﾙｿﾌｪﾛｼﾗｲﾄ

CNMNC symbol

Symbol

Fs

Locations with GPS information

IDs

GUSID (Global unique identifier short form) U_5JKBczFEWuhZSHg19YgA
GUID (Global unique identifier) 2849FE53-3317-4514-AE85-9487835F5880
Database ID 1200