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Geikielite

Pictures (9 Images total)

Geikielith
Views (Image: 1316502651): 1232, Rating: 9.2
Geikielith

Größe: 0,86 mm; Fundort: Steinbruch San Vito, San Vito, Ercolano, Monte Somma, Somma-Vesuv-Komplex, Neapel, Kampanien, Italien

Collection: Domenico Preite
Copyright: Matteo Chinellato
Contribution: Hg 2011-09-20
Locality: Steinbruch San Vito (Cava San Vito) / San Vito / Ercolano / Monte Somma / Somma-Vesuv-Komplex / Neapel, Provinz / Kampanien (Campania), Region / Italien
Geikielith
Views (Image: 1278147590): 917
Geikielith

Kristallgröße: 0,7 mm, Fundort: Steinbruch San Vito, San Vito, Ercolano, Monte Somma, Somma-Vesuv-Komplex, Neapel, Kampanien, Italien

Collection: Domenico Preite
Copyright: Enrico Bonacina
Contribution: thdun5 2010-07-03
Locality: Steinbruch San Vito (Cava San Vito) / San Vito / Ercolano / Monte Somma / Somma-Vesuv-Komplex / Neapel, Provinz / Kampanien (Campania), Region / Italien
Geikielith
Views (Image: 1256716576): 1514
Geikielith

Größe: 1,3 mm; Fundort: Monte Somma, Somma-Vesuv-Komplex, Neapel, Kampanien (Campania), Italien

Copyright: Matteo Chinellato
Contribution: Hg 2009-10-28
Locality: Monte Somma / Somma-Vesuv-Komplex / Neapel, Provinz / Kampanien (Campania), Region / Italien
Geikielith
Views (Image: 1303683451): 1072
Geikielith

Größe: 0,32 mm; Fundort: Monte Somma, Somma-Vesuv-Komplex, Neapel, Kampanien (Campania), Italien

Copyright: Matteo Chinellato
Contribution: Hg 2011-04-25
Locality: Monte Somma / Somma-Vesuv-Komplex / Neapel, Provinz / Kampanien (Campania), Region / Italien
Geikielith
Views (Image: 1316502293): 1084
Geikielith

Größe: 0,66 mm; Fundort: Steinbruch San Vito, San Vito, Ercolano, Monte Somma, Somma-Vesuv-Komplex, Neapel, Kampanien, Italien

Collection: Domenico Preite
Copyright: Matteo Chinellato
Contribution: Hg 2011-09-20
Locality: Steinbruch San Vito (Cava San Vito) / San Vito / Ercolano / Monte Somma / Somma-Vesuv-Komplex / Neapel, Provinz / Kampanien (Campania), Region / Italien
Geikielith
Views (Image: 1217697083): 824
Geikielith

Größe: 0,9 mm; Fundort: Steinbruch San Vito, San Vito, Ercolano, Monte Somma, Somma-Vesuv-Komplex, Neapel , Kampanien (Campania), Italien

Copyright: Matteo Chinellato
Contribution: Hg 2008-08-02
Locality: Steinbruch San Vito (Cava San Vito) / San Vito / Ercolano / Monte Somma / Somma-Vesuv-Komplex / Neapel, Provinz / Kampanien (Campania), Region / Italien

Collectors Summary

Color grau mit roten internen Reflektionen
Streak color purpurfarben braun
Hardness (Mohs) 5.5
Solubility + heiße HCl
Crystal System trigonal, R3

Additional information / Summary

Chemism

Chem­ical formula

MgTiO3

Addi­tional chem. informa­tion

Lt. Strunz 9. Edition: auch zugehörig zur Ilmenit Serie

Chem­ical com­po­si­tion

Magnesium, Titan, Sauerstoff

Unit weight: 120.17045 u; Number of atoms in the formula: 5

Info

Empirical formula:

MgTiO3

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Oxygen

O

39.94

3

60.00

15.9994300

47.9982900

Magnesium

Mg

20.23

1

20.00

24.3050600

24.3050600

Titanium

Ti

39.83

1

20.00

47.8671000

47.8671000

Anal­y­sis wt%

TiO2 : 63.94, FeO : 10.09, MgO : 25.79 (Ref: Dana, 7th ed. 1)

Strunz 9th edi­tion incl. updates

4.CB.05

4: Oxide, Hydroxide (Oxide, Hydroxide, V[5,6]-Vanadate, Arsenite, Antimonite, Bismutite, Sulfite, Selenite, Tellurite, Iodate)
C: Metall: Sauerstoff = 2: 3,3: 5, und vergleichbare
B: Mit mittelgroßen Kationen
05:Korund-Gruppe

Lapis Clas­sifica­tion

IV/C.05-010

IV: OXIDE
C: Oxide mit Verhältnis Metall : Sauerstoff = 2:3 (M2O3 und ver-wandte Verbindungen)
5: Ilmenit-Gruppe

Clas­sifica­tion by Hölzel

4.CD.100

4: OXIDES
C: R2O3 Sesquioxides
D: Ilmenite-Group

Dana 8th edi­tion

04.03.05.02

04: Oxide Minerals
03: Simple Oxides with a cation charge of 3+ (A+++2 O3)
05: Ilmenite Group

IMA sta­tus

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

Min­eral sta­tus

anerkanntes Mineral

IMA Classification

IMA Clas­sifica­tion

Ilmenite group

Optical Properties

Color

grau mit roten internen Reflektionen

Streak color

purpurfarben braun

Diaphane­ity (Trans­parency)

durchscheinend bis opak

max. Birefrin­gence

0.36

Birefringence chart\! Geikielite title=Birefringence chart Geikielite

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

2.31

RI value γ / ε

1.95

Ri mean

2.190

2V angle

Uniaxial (-)

Crystallography

Crystal Sys­tem

trigonal

Class (H-M)

3

Space Group number

148

Space Group

R3

Cell param­e­ters a (Å)

5.054

Cell param­e­ters b (Å)

-

Cell param­e­ters c (Å)

13.898

Cell param­e­ters a/b or c/a

2.750

Cell param­e­ters c/b

-

Z

6

Volumne (ų)

307.435

X-Ray Pow­der Diffrac­tion

4.67(10),
3.723(30),
2.735(100),
2.536(40),
2.226(40),
1.859(40),
1.714(60),
1.499(10)

XRD chart Geikielite

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)

4

3.894 ( ρ calc. Mineralienatlas )

Insta­bil­ity

+ heiße HCl

Preface

Author (Name, Year)

Dick, 1892

References

Handbook of Mineralogy (Anthony et al.), 3 (1997), 220

IMA group assignments


 
 
(Mg,Fe2+)SiO3
trigonal
R3

 
 
(Zn,Fe2+,Mn2+)TiO3
trigonal
R3

 
 
MgTiO3
trigonal
R3

 
 
FeSiO3
trigonal
R3

 
 
Fe2+TiO3
trigonal
R3

 
 
MnTiO3
trigonal
R3

 
 
FeCrO3
trigonal
R3

Refresh list

Actuality: 01. Dec 2021 - 21:34:05

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

Corundum

Al2O3

trigonal : 3m : R3c

4.CB.05

Ilmenite

Fe2+TiO3

trigonal : 3 : R3

4.CB.05

'Romanite'

(Fe2+,U,Pb)2(Ti,Fe3+)O4

4.CB.05

Brizziite

NaSbO3

trigonal : 3 : R3

4.CB.05

Eskolaite

Cr2O3

trigonal : 3m : R3c

4.CB.05

Hematite

Fe2O3

trigonal : 3m : R3c

4.CB.05

Tistarite

Ti2O3

trigonal : 3m : R3c

4.CB.05

Akimotoite

(Mg,Fe2+)SiO3

trigonal : 3 : R3

4.CB.05

Geikielite

MgTiO3

trigonal : 3 : R3

4.CB.05

Karelianite

V2O3

trigonal : 3m : R3c

4.CB.05

Pyrophanite

MnTiO3

trigonal : 3 : R3

4.CB.05

Ecandrewsite

(Zn,Fe2+,Mn2+)TiO3

trigonal : 3 : R3

4.CB.05

Thalliomelane

TlMn4+7.5Cu2+0.5O16

tetragonal : 4/m : I4/m

4.CB.05

Melanostibite

Mn(Sb5+,Fe3+)O3

trigonal : 3 : R3

4.CB.05

'Auroantimonate'

AuSbO3

4.CB.05

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

Akimotoite

(Mg,Fe2+)SiO3

trigonal : 3 : R3

IV/C.05-005

Geikielite

MgTiO3

trigonal : 3 : R3

IV/C.05-010

Ilmenite

Fe2+TiO3

trigonal : 3 : R3

IV/C.05-020

Pyrophanite

MnTiO3

trigonal : 3 : R3

IV/C.05-030

Ecandrewsite

(Zn,Fe2+,Mn2+)TiO3

trigonal : 3 : R3

IV/C.05-040

Melanostibite

Mn(Sb5+,Fe3+)O3

trigonal : 3 : R3

IV/C.05-050

Brizziite

NaSbO3

trigonal : 3 : R3

IV/C.05-060

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

Geikielite

MgTiO3

trigonal : 3 : R3

4.CD.100

Ecandrewsite

(Zn,Fe2+,Mn2+)TiO3

trigonal : 3 : R3

4.CD.110

Ilmenite

Fe2+TiO3

trigonal : 3 : R3

4.CD.120

Pyrophanite

MnTiO3

trigonal : 3 : R3

4.CD.130

Brizziite

NaSbO3

trigonal : 3 : R3

4.CD.150

Melanostibite

Mn(Sb5+,Fe3+)O3

trigonal : 3 : R3

4.CD.160

Filipstadite

(Mn2+,Mg)2(Fe3+0.5Sb5+0.5)O4

kubisch : m3m : Fd3m

4.CD.170

Tegengrenite

(Mg,Mn2+)2(Sb5+,Mn3+)O4

trigonal : 3, 3 : R3, R3

4.CD.180

Manganostibite

(Mn2+,Fe2+)7(SbO4)(AsO4,SiO4)O4

orthorhombisch : mmm : Ibmm

4.CD.190

Related minerals "Dana 8. Classification" [Mineral | Chemical formula : Crystal system : Class (H-M) | Space Group | Indenture number]

Corundum

Al2O3

trigonal : 3m : R3c

04.03.01.01

Hematite

Fe2O3

trigonal : 3m : R3c

04.03.01.02

Eskolaite

Cr2O3

trigonal : 3m : R3c

04.03.01.03

Karelianite

V2O3

trigonal : 3m : R3c

04.03.01.04

Akdalaite

(Al2O3)5·H2O

hexagonal : 6mm : P63mc

04.03.02.01

Ferrihydrite

Fe3+10O14(OH)2

hexagonal : 6mm : P63mc

04.03.02.02

Perovskite

CaTiO3

orthorhombisch : mmm : Pbnm

04.03.03.01

Latrappite

(Ca,Na)(Nb,Ti,Fe)O3

orthorhombisch : mmm : Pbnm

04.03.03.02

Lueshite

NaNbO3

orthorhombisch : mmm : Pbma

04.03.03.04

Tausonite

SrTiO3

kubisch : m3m : Pm3m

04.03.03.05

Isolueshite

Na(Nb,Ti)O3

kubisch : m3m : Pm3m

04.03.03.06

Ilmenite

Fe2+TiO3

trigonal : 3 : R3

04.03.05.01

Geikielite

MgTiO3

trigonal : 3 : R3

04.03.05.02

Pyrophanite

MnTiO3

trigonal : 3 : R3

04.03.05.03

Ecandrewsite

(Zn,Fe2+,Mn2+)TiO3

trigonal : 3 : R3

04.03.05.04

Melanostibite

Mn(Sb5+,Fe3+)O3

trigonal : 3 : R3

04.03.05.05

Brizziite

NaSbO3

trigonal : 3 : R3

04.03.05.06

Akimotoite

(Mg,Fe2+)SiO3

trigonal : 3 : R3

04.03.05.07

Macedonite

PbTiO3

tetragonal : 4mm : P4mm

04.03.06.01

Maghemite

Fe2.67O4

kubisch : 432 : P4132, P4332

04.03.07.01

Bixbyite

(Mn3+,Fe3+)2O3

kubisch : m3 : Ia3

04.03.07.02

Avicennite

Tl2O3

kubisch : m3 : Ia3

04.03.08.01

Arsenolite

As2O3

kubisch : m3m : Fd3m

04.03.09.01

Sénarmontite

Sb2O3

kubisch : m3m : Fd3m

04.03.09.02

Alternative Name

Geikielit

Geikilithe

CNMNC symbol

Symbol

Gk

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