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Irinarassite (Irinarassit)

Collectors Summary

Color hellbraun, gelb
Cleavages keine
Fracture unregelmäßig
Crystal System kubisch, Ia3d

Chemism

Chem­ical formula

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

Empir­ical formula (anal­y­sis)

(Ca2.965Fe2+0.035)Σ3(Sn1.016Zr0.410Ti0.262Sb5+0.237Fe2+0.035U6+0.017Sc0.014Hf0.006Nb0.004)Σ2.001(Al1.386Fe3+0.804Si0.446Ti4+0.364)Σ3 O12

Addi­tional chem. informa­tion

Granat-Gruppe

Chem­ical com­po­si­tion

Aluminium, Calcium, Silicium, Zinn, Sauerstoff

Unit weight: 632.5092724254 u; Number of atoms in the formula: 20.001

Info

Empirical formula:

(Ca2.965Fe0.035)(Sn1.016Zr0.410Ti0.262Sb0.237Fe0.035U0.017Sc0.014Hf0.006Nb0.004)(Al1.386Fe0.804Si0.446Ti0.364)O12

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Oxygen

O

30.35

12

60.00

15.9994300

191.9931600

Aluminium

Al

5.91

1.39

6.93

26.9815382

37.3964119

Silicon

Si

1.98

0.45

2.23

28.0855300

12.5261464

Calcium

Ca

18.79

2.97

14.82

40.0784000

118.8324560

Scandium

Sc

0.10

0.01

0.07

44.9559108

0.6293828

Titanium

Ti

4.74

0.63

3.13

47.8671000

29.9648046

Iron

Fe

7.72

0.87

4.37

55.8452000

48.8087048

Zirconium

Zr

5.91

0.41

2.05

91.2242000

37.4019220

Niobium

Nb

0.06

0

0.02

92.9063820

0.3716255

Tin

Sn

19.07

1.02

5.08

118.7107000

120.6100712

Antimony

Sb

4.56

0.24

1.18

121.7601000

28.8571437

Hafnium

Hf

0.17

0.01

0.03

178.4920000

1.0709520

Uranium

U

0.64

0.02

0.08

238.0289130

4.0464915

Anal­y­sis wt%

SiO2 : 9.51, SnO2 : 47.71, Al2O3 : 16.14, CaO : 26.63 (Ref: berechnet)

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.08-175

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

Clas­sifica­tion by Hölzel

9.AC.570

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

IMA sta­tus

anerkannt, Jan. 2011 - CNMNC Newsletter No. 8, April 2011

Min­eral sta­tus

anerkanntes Mineral

IMA Classification

IMA Clas­sifica­tion

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

Optical Properties

Color

hellbraun, gelb

Ri mean

1.9

Anisotropism

isotropisch

Crystallography

Crystal Sys­tem

kubisch

Class (H-M)

m3m

Space Group number

230

Space Group

Ia3d

Cell param­e­ters a (Å)

12.50

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)

1953.125

X-Ray Pow­der Diffrac­tion

4.419(65), 3.125(60), 2.795(47), 2.552(88), 1.976(27), 1.670(100), 1.563(22), 1.333(26)

XRD chart Irinarassite

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

Physical Properties

Density (g/cm³)

4.3 (berechnet)

4.302 ( ρ calc. Mineralienatlas )

Cleav­ages

keine

Frac­ture

unregelmäßig

(Co-)Type locality

(Co-)Type locality

Russland/Nordkaukasus, Föderationskreis/Kabardino-Balkarien, Republik/Obere vulkanische Chegem-Struktur (Verkhnechegemskaya Caldera)/Verkhni

Russland/Nordkaukasus, Föderationskreis/Kabardino-Balkarien, Republik/Obere vulkanische Chegem-Struktur (Verkhnechegemskaya Caldera)/Lakargi-Gebirge

Russland/Nordkaukasus, Föderationskreis/Kabardino-Balkarien, Republik/Obere vulkanische Chegem-Struktur (Verkhnechegemskaya Caldera)/Xenolith Nummer 7

Type mate­r­ial

Fersman Mineralogical Museum of the Russian Academy of Sciences, Moscow, Russia

Col­lec­tion number of type mate­r­ial

4026/1

Par­a­ge­n­e­sis of type mate­r­ial

Lakargiit, Tazheranit, Baddeleyit, Kerimasit, Kimzeyit, Baghdadit und selten Magnesioferrit in den Pseudomorphosen, die eingeschlossen sind, um Larnit-Cuspidin-Zonen und unmittelbar mit dem Ignimbrit verbunden sind. Larnit, Cuspidin, Rondorfit, Fluorellestadit und Hydroxylellestadit, Fluorit und sekundären Mineralien wie Ettringit, Hillebrandit und Bultfonteinit sind mit Irinarassit verbunden.

Preface

Author (Name, Year)

I.O. Galuskina, E.V. Galuskin, K. Prusik, V.M. Gazeev, N.N. Pertsev and P. Dzierżanowski (2011)

References

CNMNC Newsletter No. 8, April 2011, page 291; Mineralogical Magazine, 75, 289-294.

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]

Galuskina, I.O., Galuskin, E.V., Prusik, K., Gazeev, V.M., Pertsev, N.N., Dzierżanowski, P. (2013): Irinarassite Ca3Sn2SiAl2O12 - new garnet from the Upper Chegem Caldera, Northern Caucasus, Kabardino-Balkaria, Russia. Mineralogical Magazine, 77, 2857-2866.

IMA group assignments

 
{X3}[Y2](Z3)φ12
 
 


 
 
 
{Ca3}[Sn4+2](SiAl2)O12
kubisch
Ia3d

 
 
 
{Ca3}[Zr2](SiFe3+2)O12
kubisch
Ia3d

 
 
 
{Ca3}[Zr2](SiAl2)O12
kubisch
Ia3d

 
 
 
{Ca3}[Ti2](SiFe3+2)O12
kubisch
Ia3d

 
 
 
{Ca3}[Sn4+2](SiFe3+2)O12
kubisch
Ia3d

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Actuality: 19. May 2022 - 02:12:51

Other languages

German

Irinarassit

English

Irinarassite

Russian

Иринарассит

CNMNC (IMA)-Number

IMA 2010-073

CNMNC symbol

Symbol

Inr

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

German pages

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