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Eringaite

Collectors Summary

Cleavages keine
Fracture unregelmäßig
Crystal System kubisch, Ia3d

Chemism

Chemical formula

{Ca3}[Sc2](Si3)O12

Additional chem. information

Granat-Gruppe

Chemical composition

Calcium, Scandium, Silicium, Sauerstoff

Unit weight: 486.3967716 u; Number of atoms in the formula: 20

Info

Empirical formula:

{Ca3}[Sc2](Si3)O12

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Oxygen

O

39.47

12

60.00

15.9994300

191.9931600

Silicon

Si

17.32

3

15.00

28.0855300

84.2565900

Calcium

Ca

24.72

3

15.00

40.0784000

120.2352000

Scandium

Sc

18.49

2

10.00

44.9559108

89.9118216

Analysis wt%

SiO2 : 29.39, TiO2 : 7.17, ZrO2 : 5.28, Al2O3 : 3.15, Sc2O3 : 10.67, Cr2O3 : 1.05, Fe2O3 : 8.48, FeO : 0.50, MgO : 0.95, CaO : 33.19 (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.08-145

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

Classification by Hölzel

9.AC.460

9: SILICATES
A: Nesosilicates
C: Garnet-Group
4: Uvavorite-Group - 6-coord. Cr, V, Sc

IMA status

anerkannt, Neue Mineralien - IMA Web-Seite, Okt. 2009

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

Garnet supergroup  ⇒ Silicate garnets; Garnet group (Z charge 12)

Optical Properties

max. Birefringence

0.000

2V angle

Isotropisch

Crystallography

Crystal System

kubisch

Class (H-M)

m3m

Space Group number

230

Space Group

Ia3d

Cell parameters a (Å)

12.19

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

Volume (ų)

1811.386

Crystal structure

Struktur bestimmt

X-Ray Powder Diffraction

3.064(62), 2.740(88), 2.502(72), 1.670(32), 1.638(100), 1.138(23), 1.119(30)

XRD chart Eringaite

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

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Density (g/cm³)

3.654 (berechnet)

3.567 ( ρ calc. Mineralienatlas )

Cleavages

keine

Fracture

unregelmäßig

Preface

Author (Name, Year)

Irina O. Galuskina, 2009

References

Neue Mineralien - IMA Web-Seite, Okt. 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]

Galuskina, I. O., Galuskin, E. V., Lazic, B., Armbruster, T., Dzierżanowski, P., Prusik, K., & Wrzalik, R. (2010). Eringaite, Ca 3 Sc 2 (SiO 4) 3, a new mineral of the garnet group. Mineralogical Magazine, 74(2), 365-373.

IMA group assignments

 
{X3}[Y2](Z3)φ12
 
 


 
 
 
{Fe2+3}[Al2](Si3)O12
kubisch
Ia3d

 
 
 
{Ca3}[Fe3+2](Si3)O12
kubisch
Ia3d

 
 
 
{Mn2+3}[Fe3+2](Si3)O12
kubisch
Ia3d

 
 
 
{Ca3}[Sc2](Si3)O12
kubisch
Ia3d

 
 
 
{Ca3}[V3+2](Si3)O12
kubisch
Ia3d

 
 
 
{Ca3}[Al2](Si3)O12
kubisch
Ia3d

 
 
 
{Ca3}[Ti2](SiAl2)O12
kubisch
Ia3d

 
 
 
{Mg3}[Cr3+2](Si3)O12
kubisch
Ia3d

 
 
 
{Mg3}[MgSi](Si3)O12
kubisch
 

 
 
 
{Y2Ca}[Mg2](Si3)O12
kubisch
Ia3d

 
 
 
{Mn2+3}[V3+2](Si3)O12
kubisch
Ia3d

 
 
 
{Ca3}[TiFe2+](Si3)O12
kubisch
Ia3d

 
 
 
{Mg3}[Al2](Si3)O12
kubisch
Ia3d

 
 
 
{Mn2+3}[Al2](Si3)O12
kubisch
Ia3d

 
 
 
{Ca3}[Cr3+2](Si3)O12
kubisch
Ia3d

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Actuality: 19. May 2024 - 08:35:08

Other languages

German

Eringait

English

Eringaite

Russian

Эрингаит

CNMNC (IMA)-Number

IMA 2009-054

CNMNC symbol

Symbol

Erg

Locations with GPS information

IDs

GUSID (Global unique identifier short form) 0a8VcPlKvkeA3FgiZ1616Q
GUID (Global unique identifier) 7015AFD1-4AF9-47BE-80DC-5822675EB5E9
Database ID 5282