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Ferrosilite

Pictures (4 Images total)

Ferrosilit
Views (Image: 1292274382): 5296
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 (Image: 1292273254): 4780
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 (Image: 1318405292): 4642
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 / Mayen / Mayen-Koblenz-Kreis / Rheinland-Pfalz / Deutschland
Ferrosilit, Magnetit
Views (Image: 1401828744): 3023
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 / Kyushu / Japan

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

Volumne (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



 
 
 
(Mn,Mg)MgSi2O6
orthorhombisch
Pbca

 
 
 
Mg2Si2O6
orthorhombisch
Pbca

 
 
 
(Fe2+,Mg)2Si2O6
orthorhombisch
Pbca

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Actuality: 23. May 2022 - 01:44:20

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

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

German pages

DeWikiPedia - search for: Ferrosilit
Google-Bilder-Suche - search for: Ferrosilit
Mineralienatlas.de (Forum) - search for: Ferrosilit

English pages

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

Russian pages

Webmineral.ru - search for: Ферросилит

Mineral Dealer

German pages

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

Locations with GPS information