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Geikielite

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Pictures (9 Images total)

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

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

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

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

Views (Image: 1256716576): 1514

Geikielith

Größe: 1,3 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 (Image: 1303683451): 1072

Geikielith

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

Matteo Chinellato

Contribution: Hg 2011-04-25

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

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

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

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

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

More images

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

Search for minerals with similar chemistry

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

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 (Å³)	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)
	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

(Co-)Type locality

Sri Lanka /Sabaragamuwa, Provinz /Rathnapura (Ratnapura), Distrikt /Rakwana

Sri Lanka /Sabaragamuwa, Provinz /Rathnapura (Ratnapura), Distrikt /Balangoda

Preface

Author (Name, Year)

Dick, 1892

References

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

IMA group assignments

Ilmenite group Akimotoite (Mg,Fe²⁺)SiO₃ trigonal R3 Ecandrewsite (Zn,Fe²⁺,Mn²⁺)TiO₃ trigonal R3 Geikielite MgTiO₃ trigonal R3 Hemleyite FeSiO₃ trigonal R3 Ilmenite Fe²⁺TiO₃ trigonal R3 Pyrophanite MnTiO₃ trigonal R3 UMM2015-01-O:CrFe 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	Fe_2.67O₄ 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

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

German pages	DeWikiPedia - search for: Geikielith Google-Bilder-Suche - search for: Geikielith Mineralogisch-Petrographisches-Institut Hamburg - search for: Geikielith
English pages	Mindat - search for: Geikielite Webmineral - search for:Geikielite Handbook-of-Mineralogy - search for: Geikielite RRUFF - Raman, XRD and other mineral data - search for: Geikielite RRUFF - References and PDF downloads - search for: Geikielite American-Mineralogist-Crystal-Structure-Database - search for: Geikielite Athena - search for: Geikielite
Russian pages	Webmineral.ru - search for: Гейкилит

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German pages

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