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Kerimasite

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Kerimasit
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Kerimasit

isometrischer Kerimasit, Magnet Cove, Arkansas, USA; BB < 1 mm, analysiert

Copyright: MinTreasure.com (Carsten Slotta)
Contribution: openpit 2019-11-27
Locality: Magnet Cove / Hot Spring Co. / Arkansas / USA

Collectors Summary

Color hell- bis dunkelbraun
Lustre Glasglanz
Cleavages keine
Crystal System kubisch, Ia3d
Morphology Kristalle bis 100 µm, in Carbonatit

Chemism

Chem­ical formula

{Ca3}[Zr2](SiFe3+2)O12

Addi­tional chem. informa­tion

Granat Gruppe

Chem­ical com­po­si­tion

Calcium, Eisen, Silicium, Zirconium, Sauerstoff

Unit weight: 634.45269 u; Number of atoms in the formula: 20

Info

Empirical formula:

{Ca3}[Zr2](SiFe2)O12

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Oxygen

O

30.26

12

60.00

15.9994300

191.9931600

Silicon

Si

4.43

1

5.00

28.0855300

28.0855300

Calcium

Ca

18.95

3

15.00

40.0784000

120.2352000

Iron

Fe

17.60

2

10.00

55.8452000

111.6904000

Zirconium

Zr

28.76

2

10.00

91.2242000

182.4484000

Anal­y­sis wt%

SiO2 : 8.37, Nb2O5 : 3.00, ZrO2 : 34.42, TiO2 : 2.10, Al2O3 : 6.83, Fe2O3 : 16.01, CaO : 27.31, Ln2O3 : 0.94 (Ref: Mineralogical Magazine 2010)

Strunz 9th edi­tion incl. updates

9.AD.25

9: Silikate (Germanate)
A: Inselsilikate (Nesosilikate)
D: Insel(Neso)silikate ohne weitere Anionen; Kationen in oktahedraler [6] und gewöhnlich größerer Koordination
25:Granat-Gruppe

Lapis Clas­sifica­tion

VIII/A.08-185

VIII: SILIKATE
A: Inselsilikate mit [SiO4] 4--Baugruppen
8: Kationen in kubischer und oktaedrischer Koordination [8+6]; Granat-Gruppe

Clas­sifica­tion by Hölzel

9.AC.540

9: SILICATES
A: Nesosilicates
C: Garnet-Group
5: Schorlomite-Group - 6-coord. Ti, Zr, Sn

IMA sta­tus

anerkannt, IMA WEB-Seite, Neue Mineralien Juli 2009

Min­eral sta­tus

anerkanntes Mineral

IMA Classification

IMA Clas­sifica­tion

Garnet supergroup  ⇒ Silicate garnets; Schorlomite group (Z charge 10)

Optical Properties

Color

hell- bis dunkelbraun

Diaphane­ity (Trans­parency)

transparent

Lus­tre

Glasglanz

RI value α / ω / n

1.945

Ri mean

1.945

2V angle

Isotropisch

Pleochro­ism

isotrop

Crystallography

Crystal Sys­tem

kubisch

Class (H-M)

m3m

Space Group number

230

Space Group

Ia3d

Cell param­e­ters a (Å)

12.549

Cell param­e­ters b (Å)

-

Cell param­e­ters c (Å)

-

Cell param­e­ters a/b or c/a

1

Cell param­e­ters c/b

-

Cell param­e­ters α

90°

Cell param­e­ters β

90°

Cell param­e­ters γ

90°

Z

8

Volumne (ų)

1976.184

Kristall struc­ture

Granatstruktur, siehe A.N. Zaitsev et al., 2010

X-Ray Pow­der Diffrac­tion

4.441(41), 3.140(91), 2.808(70), 2.564(93), 1.985(21), 1.741(26), 1.677(100), 1.403(17)

XRD chart Kerimasite

Calculated from d-spacing and intensity at 0.1541838 nm (Cu)

Morphol­ogy

Kristalle bis 100 µm, in Carbonatit

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

VHN (Hard­ness Vick­ers)

1228 (25g)

Density (g/cm³)

4.105(1) ber.

4.265 ( ρ calc. Mineralienatlas )

Cleav­ages

keine

Tenac­ity

spröde

(Co-)Type locality

(Co-)Type locality

Tansania/Arusha, Region/Ngorogoro/Kerimasi, Vulkan

Preface

Name from

der Typlokalität

Author (Name, Year)

Anatoly N. Zaitsev et al., 2010

References

A. N. Zaitsev, C. T. Williams, S. N. Britvin, I. V. Kuznetsova, J. Spratt, S. V. Petrov and J. Keller: Kerimasite, Ca3Zr2(FormulaSi)O12, a new garnet from carbonatites of Kerimasi volcano and surrounding explosion craters, northern Tanzania. Mineralogical Magazine; October 2010; v. 74; no. 5; p. 803-820.

IMA WEB-Seite, Neue Mineralien Juli 2009.

Grew, E.S., Locock, A.J., Mills, S.J., Galuskina, I.O., Galuskin, E.V., Halenius, U., 2012; Nomenclature of the garnet supergroup. American Mineralogist; preprint December 2012 - [Formel]

Uher, P., Milovská, S., Milovský, R., Koděra, P., Bačík, P., Bilohuščin, V. - Kerimasite, {Ca3}[Zr2]( )O12 garnet from the Vysoká-Zlatno skarn, Štiavnica stratovolcano, Slovakia. Mineralogical Magazine, 79 (2015), 715-733

IMA group assignments

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

Pyrope

{Mg3}[Al2](Si3)O12

kubisch : m3m : Ia3d

9.AD.25

'Garnet supergroup'

neue Definition: {X3}[Y2](Z3)φ12

kubisch : kubisch-hexakisoktaedrisch

9.AD.25

Katoite

{Ca3}[Al2](☐3)(OH)12

kubisch : m3m : Ia3d

9.AD.25

Majorite

Mg3(MgSi)(SiO4)3

9.AD.25

'Melanite' (Var.v. Andradite)

9.AD.25

Rubinite

Ca3Ti3+2Si3O12

kubisch : m3m : Ia3d

9.AD.25

Wadalite

Ca6Al5Si2O16Cl3

kubisch : 43m : I43d

9.AD.25

Almandine

{Fe2+3}[Al2](Si3)O12

kubisch : m3m : Ia3d

9.AD.25

Andradite

{Ca3}[Fe3+2](Si3)O12

kubisch : m3m : Ia3d

9.AD.25

Calderite

{Mn2+3}[Fe3+2](Si3)O12

kubisch : m3m : Ia3d

9.AD.25

'Hessonite' (Var.v. Grossular)

Ca3Al2(SiO4)3

9.AD.25

'Hibschite' (Var.v. Grossular)

Ca3Al2(SiO4)3-x(OH)4*x {x<0.2-1.5}

kubisch : m3m : Ia3d

9.AD.25

Kimzeyite

{Ca3}[Zr2](SiAl2)O12

kubisch : m3m : Ia3d

9.AD.25

Uvarovite

{Ca3}[Cr3+2](Si3)O12

kubisch : m3m : Ia3d

9.AD.25

Goldmanite

{Ca3}[V3+2](Si3)O12

kubisch : m3m : Ia3d

9.AD.25

Grossular

{Ca3}[Al2](Si3)O12

kubisch : m3m : Ia3d

9.AD.25

Holtstamite

{Ca3}[Al2](Si2)(☐)O8(OH)4

tetragonal : 4/mmm : I41/acd

9.AD.25

Hutcheonite

{Ca3}[Ti2](SiAl2)O12

kubisch : m3m : Ia3d

9.AD.25

Knorringite

{Mg3}[Cr3+2](Si3)O12

kubisch : m3m : Ia3d

9.AD.25

Morimotoite

{Ca3}[TiFe2+](Si3)O12

kubisch : m3m : Ia3d

9.AD.25

Schorlomite

{Ca3}[Ti2](SiFe3+2)O12

kubisch : m3m : Ia3d

9.AD.25

Spessartine

{Mn2+3}[Al2](Si3)O12

kubisch : m3m : Ia3d

9.AD.25

Momoiite

{Mn2+3}[V3+2](Si3)O12

kubisch : m3m : Ia3d

9.AD.25

Kerimasite

{Ca3}[Zr2](SiFe3+2)O12

kubisch : m3m : Ia3d

9.AD.25

Toturite

{Ca3}[Sn4+2](SiFe3+2)O12

kubisch : m3m : Ia3d

9.AD.25

Menzerite-(Y)

{Y2Ca}[Mg2](Si3)O12

kubisch : m3m : Ia3d

9.AD.25

Elbrusite

{Ca3}[U6+0.5Zr1.5](Fe3+3)O12

kubisch : m3m : Ia3d

9.AD.25

Bitikleite

{Ca3}[Sb5+Sn4+](Al3)O12

kubisch : m3m : Ia3d

9.AD.25

Usturite

{Ca3}[Sb5+Zr](Fe3+3)O12

kubisch : m3m : Ia3d

9.AD.25

Eringaite

{Ca3}[V3+2](Si3)O12

kubisch : m3m : Ia3d

9.AD.25

Dzhuluite

{Ca3}[Sb5+Sn4+](Fe3+3)O12

kubisch : m3m : Ia3d

9.AD.25

Irinarassite

{Ca3}[Sn4+2](SiAl2)O12

kubisch : m3m : Ia3d

9.AD.25

Eltyubyuite

Ca12Fe3+10Si4O32Cl6

kubisch : 43m : I43d

9.AD.25

Adrianite

Ca12(Al4Mg3Si7)O32Cl6

kubisch : 43m : I43d

9.AD.25

Priscillagrewite-(Y)

YCa2Zr2Al3O12

kubisch : m3m : Ia3d

9.AD.25

'Hydroandradite' (Var.v. Andradite)

Ca3Fe3+2(SiO4)3-x(OH)4x

9.AD.25

'Hydrougrandite'

(Ca,Mg,Fe2+)3(Fe3+,Al)2(SiO4)3-x(OH)4x

9.AD.25

Nikmelnikovite

Ca12Fe2+Fe3+3Al3(SiO4)6(OH)20

trigonal : 3 : R3

9.AD.25

Henritermierite

{Ca3}[Mn3+2](Si2)(☐)O8(OH)4

tetragonal : 4/mmm : I41/acd

9.AD.25

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

Pyrope

{Mg3}[Al2](Si3)O12

kubisch : m3m : Ia3d

VIII/A.08-010

Almandine

{Fe2+3}[Al2](Si3)O12

kubisch : m3m : Ia3d

VIII/A.08-020

Spessartine

{Mn2+3}[Al2](Si3)O12

kubisch : m3m : Ia3d

VIII/A.08-030

Calderite

{Mn2+3}[Fe3+2](Si3)O12

kubisch : m3m : Ia3d

VIII/A.08-040

Knorringite

{Mg3}[Cr3+2](Si3)O12

kubisch : m3m : Ia3d

VIII/A.08-050

Majorite

Mg3(MgSi)(SiO4)3

VIII/A.08-060

Menzerite-(Y)

{Y2Ca}[Mg2](Si3)O12

kubisch : m3m : Ia3d

VIII/A.08-065

Grossular

{Ca3}[Al2](Si3)O12

kubisch : m3m : Ia3d

VIII/A.08-070

'Hibschite' (Var.v. Grossular)

Ca3Al2(SiO4)3-x(OH)4*x {x<0.2-1.5}

kubisch : m3m : Ia3d

VIII/A.08-080

Katoite

{Ca3}[Al2](☐3)(OH)12

kubisch : m3m : Ia3d

VIII/A.08-090

'Hydrougrandite'

(Ca,Mg,Fe2+)3(Fe3+,Al)2(SiO4)3-x(OH)4x

VIII/A.08-100

Andradite

{Ca3}[Fe3+2](Si3)O12

kubisch : m3m : Ia3d

VIII/A.08-110

Schorlomite

{Ca3}[Ti2](SiFe3+2)O12

kubisch : m3m : Ia3d

VIII/A.08-120

Morimotoite

{Ca3}[TiFe2+](Si3)O12

kubisch : m3m : Ia3d

VIII/A.08-125

Uvarovite

{Ca3}[Cr3+2](Si3)O12

kubisch : m3m : Ia3d

VIII/A.08-130

Momoiite

{Mn2+3}[V3+2](Si3)O12

kubisch : m3m : Ia3d

VIII/A.08-138

Goldmanite

{Ca3}[V3+2](Si3)O12

kubisch : m3m : Ia3d

VIII/A.08-140

Eringaite

{Ca3}[V3+2](Si3)O12

kubisch : m3m : Ia3d

VIII/A.08-145

Kimzeyite

{Ca3}[Zr2](SiAl2)O12

kubisch : m3m : Ia3d

VIII/A.08-150

Bitikleite

{Ca3}[Sb5+Sn4+](Al3)O12

kubisch : m3m : Ia3d

VIII/A.08-160

Dzhuluite

{Ca3}[Sb5+Sn4+](Fe3+3)O12

kubisch : m3m : Ia3d

VIII/A.08-165

Usturite

{Ca3}[Sb5+Zr](Fe3+3)O12

kubisch : m3m : Ia3d

VIII/A.08-170

Irinarassite

{Ca3}[Sn4+2](SiAl2)O12

kubisch : m3m : Ia3d

VIII/A.08-175

Toturite

{Ca3}[Sn4+2](SiFe3+2)O12

kubisch : m3m : Ia3d

VIII/A.08-180

Kerimasite

{Ca3}[Zr2](SiFe3+2)O12

kubisch : m3m : Ia3d

VIII/A.08-185

Elbrusite

{Ca3}[U6+0.5Zr1.5](Fe3+3)O12

kubisch : m3m : Ia3d

VIII/A.08-190

Wadalite

Ca6Al5Si2O16Cl3

kubisch : 43m : I43d

VIII/A.08-200

Eltyubyuite

Ca12Fe3+10Si4O32Cl6

kubisch : 43m : I43d

VIII/A.08-205

Holtstamite

{Ca3}[Al2](Si2)(☐)O8(OH)4

tetragonal : 4/mmm : I41/acd

VIII/A.08-210

Henritermierite

{Ca3}[Mn3+2](Si2)(☐)O8(OH)4

tetragonal : 4/mmm : I41/acd

VIII/A.08-220

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

Schorlomite

{Ca3}[Ti2](SiFe3+2)O12

kubisch : m3m : Ia3d

9.AC.500

Morimotoite

{Ca3}[TiFe2+](Si3)O12

kubisch : m3m : Ia3d

9.AC.510

Kimzeyite

{Ca3}[Zr2](SiAl2)O12

kubisch : m3m : Ia3d

9.AC.530

Kerimasite

{Ca3}[Zr2](SiFe3+2)O12

kubisch : m3m : Ia3d

9.AC.540

Toturite

{Ca3}[Sn4+2](SiFe3+2)O12

kubisch : m3m : Ia3d

9.AC.560

Irinarassite

{Ca3}[Sn4+2](SiAl2)O12

kubisch : m3m : Ia3d

9.AC.570

CNMNC (IMA)-Number

IMA 2009-029

CNMNC symbol

Symbol

Kms

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

German pages

DeWikiPedia - search for: Kerimasit
Google-Bilder-Suche - search for: Kerimasit
Mineralogisch-Petrographisches-Institut Hamburg - search for: Kerimasit

English pages

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

Russian pages

Webmineral.ru - search for: Керимасит

Mineral Dealer

German pages

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Locations with GPS information