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Almandine

Pictures (310 Images total)

Almandin
Views (File:
1298064097
): 1903
Almandin
Rotbrauner Kristall, BB = 9,2 mm. Fundort : Scheib(NÖ), Kirchschlag, Zwettl, Waldviertel, Niederösterreich, Österreich.
Copyright: Hannes Osterhammer; Contribution: Münchener Micromounter
Collection: Lithothek der Münchener Micromounter, Collection number: A021170, Donator: Erwin Loeffler
Location: Österreich/Niederösterreich/Zwettl, Bezirk/Kirchschlag/Scheib/Steinbruch Scheib
Mineral: Almandine
Encyclopedia: Deltoidalikositetraeder (Ikositetraeder)
Image: 1298064097
Rating: 9.5 (votes: 2)
License: Usage for Mineralienatlas project only
Almandin (SNr: A021170)  D

Rotbrauner Kristall, BB = 9,2 mm. Fundort : Scheib(NÖ), Kirchschlag, Zwettl, Waldviertel, Niederösterreich, Österreich.

Collection: Lithothek der Münchener Micromounter
Copyright: Hannes Osterhammer
Contribution: Münchener Micromounter 2011-02-18
Locality: Steinbruch Scheib / Scheib / Kirchschlag / Zwettl, Bezirk / Niederösterreich / Österreich
Almandin
Views (File:
1563102492
): 6683
Almandin
Etwa 12 mm großer scharfkantiger Almandin-Deltoidikositetraeder auf rhyolithischer Matrix vom Garnet Hill in Nevada.
Copyright: Klaus Schäfer; Contribution: Klaus Schäfer
Collection: Klaus Schäfer, Collection number: SyS-Alma-4-1-1
Location: USA/Nevada/White Pine Co./Robinson District/Ely/Garnet Hill
Mineral: Almandine
Image: 1563102492
Rating: 9.5 (votes: 2)
License: Usage for Mineralienatlas project only
Almandin (SNr: SyS-Alma-4-1-1)

Etwa 12 mm großer scharfkantiger Almandin-Deltoidikositetraeder auf rhyolithischer Matrix vom Garnet Hill in Nevada.

Collection: Klaus Schäfer
Copyright: Klaus Schäfer
Contribution: Klaus Schäfer 2019-07-14
Locality: Garnet Hill / Ely / Robinson District / White Pine Co. / Nevada / USA
Almandine
Views (File:
1603955721
): 219
Almandine
Large and finished all around, Almandine garnet crystal, from River Valley Garnet Mine, Dana Township, Sudbury District, Ontario, Canada; Dimensions: 57 mm x 56 mm x 48 mm
Copyright: pegmatite; Contribution: pegmatite
Location: Kanada/Ontario/Nipissing District/West Nipissing, Municipality/River Valley Garnet Mine (Industrial Garnet Mine)
Mineral: Almandine
Image: 1603955721
Rating: 9.5 (votes: 2)
License: Usage for Mineralienatlas project only
Almandine  D

Large and finished all around, Almandine garnet crystal, from River Valley Garnet Mine, Dana Township, Sudbury District, Ontario, Canada; Dimensions: 57 mm x 56 mm x 48 mm

Copyright: pegmatite
Contribution: pegmatite 2020-10-29
Locality: River Valley Garnet Mine (Industrial Garnet Mine) / West Nipissing, Municipality / Nipissing District / Ontario / Kanada
Almandin
Views (File:
1716137464
): 327
Almandin
Etwa 80 mm x 57 mm große Glimmerschieferstufe mit Almandinkristallen von der Goldkoppe, Olmütz in Tschechien.
Copyright: Klaus Schäfer; Contribution: Klaus Schäfer
Collection: Klaus Schäfer, Collection number: SyS-Alma-5-1-15
Location: Tschechien/Olmütz (Olomoucký kraj)/Freiwaldau (Okres Jesenik)/Goldkoppe (Zlaty Chlum)
Mineral: Almandine
Rock: mica schist
Image: 1716137464
Rating: 10 (votes: 1)
License: Usage for Mineralienatlas project only
Almandin (SNr: SyS-Alma-5-1-15)

Etwa 80 mm x 57 mm große Glimmerschieferstufe mit Almandinkristallen von der Goldkoppe, Olmütz in Tschechien.

Collection: Klaus Schäfer
Copyright: Klaus Schäfer
Contribution: Klaus Schäfer 2024-05-19
Locality: Goldkoppe (Zlaty Chlum) / Freiwaldau (Okres Jesenik) / Olmütz (Olomoucký kraj) / Tschechien
Almandin
Views (File:
1350943647
): 16705, Rating: 9.3
Almandin
Bildbreite: 1,4 mm; Deutschland/Rheinland-Pfalz/Vulkaneifel-Kreis/Daun/Üdersdorf/Emmelberg
Copyright: loparit; Contribution: loparit
Collection: loparit, Collection number: EM 3243
Location: Deutschland/Rheinland-Pfalz/Vulkaneifel, Landkreis/Daun/Üdersdorf/Emmelberg
Mineral: Almandine
Image: 1350943647
Rating: 9.3 (votes: 10)
License: Usage for Mineralienatlas project only
Almandin (SNr: EM 3243)

Bildbreite: 1,4 mm; Deutschland/Rheinland-Pfalz/Vulkaneifel-Kreis/Daun/Üdersdorf/Emmelberg

Collection: loparit
Copyright: loparit
Contribution: loparit 2012-10-22
Locality: Emmelberg / Üdersdorf / Daun / Vulkaneifel, Landkreis / Rheinland-Pfalz / Deutschland

You find additional specimen at the Geolitho Museum

Collectors Summary

Color violett, rot, braunrot, (selten) schwarz
Streak color weiß
Hardness (Mohs) 6.5 - 7.5
Solubility +++ HF
Crystal System kubisch, Ia3d

Additional information / Summary

Siehe auch Mineralienportrait: Granat - Almandin

Chemism

Chemical formula

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

Chemical composition

Aluminium, Eisen, Silicium, Sauerstoff

Unit weight: 497.7484264 u; Number of atoms in the formula: 20

Info

Empirical formula:

{Fe3}[Al2](Si3)O12

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Oxygen

O

38.57

12

60.00

15.9994300

191.9931600

Aluminium

Al

10.84

2

10.00

26.9815382

53.9630764

Silicon

Si

16.93

3

15.00

28.0855300

84.2565900

Iron

Fe

33.66

3

15.00

55.8452000

167.5356000

Analysis wt%

SiO2 : 35.96, Al2O3 : 21.79, Fe2O3 : 0.60, FeO : 33.05, MnO : 1.67, MgO : 3.27, CaO : 1.32 (Ref: Journal of Petrology 62)

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.08-020

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

Classification by Hölzel

9.AC.110

9: SILICATES
A: Nesosilicates
C: Garnet-Group
1: Pyralspites - 8-coord. Mg, Fe(2+), Mn(2+); Pyrope - Spessartine-Group

Dana 8th edition

51.04.03a.02

51: Nesosilicate Minerals
04: Nesosilicates Nesosilicate Insular SiO4 Groups Only with cations in [6] and >[6] coordination
03a: Garnet group (Pyralspite series)

IMA status

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

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

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

Optical Properties

Color

violett, rot, braunrot, (selten) schwarz

Streak color

weiß

RI value α / ω / n

1.830

Ri mean

1.830

2V angle

Isotropisch

Crystallography

Crystal System

kubisch

Class (H-M)

m3m

Space Group number

230

Space Group

Ia3d

Cell parameters a (Å)

11.526

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)

1531.214

X-Ray Powder Diffraction

2.893(30),
2.586(100),
2.361(20),
2.112(20),
1.876(20),
1.604(30),
1.546(30),
1.445(10)

XRD chart Almandine

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)

6.5 - 7.5

VHN (Hardness Vickers)

1450 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

4.2

4.318 ( ρ calc. Mineralienatlas )

Instability

+++ HF

Chemical Properties and Tests

schwach magnetisch

Preface

Name from

dem antiken Bearbeitungsort Alabanda in Kleinasien

Author (Name, Year)

Agricola, 1546

References

American Mineralogist 77 (1992), 399.

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]

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: 06. Feb 2025 - 23:08:27

Other languages

Dutch

Almandien

German

Almandin

French

Almandin

Lithuanian

Almandinas

English

Almandine

Spanish

Almandino

Polish

Almandyn

Serbian (Cyrillic Script)

Алмандин

Russian

Альмандин

Japanese

鉄礬柘榴石

Traditional Chinese

鐵鋁榴石

Simplified Chinese

铁铝榴石

Alternative Name

Adelaide ruby

Adelaide-Rubin

Latin

Alabandicus (of Pliny)

Alabandine Ruby

Alamandine

Almandine Garnet

Almandit

Almandita

Almandite

English

Carbuncle

Latin

Carbunculus

Felsenrubin

German

Karfunkel

Oriental Garnet

Traditional Chinese

貴榴石

Simplified Chinese

贵榴石

CNMNC symbol

Symbol

Alm

Rock part of

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Hint

- Essential mineral - Important for the classification of the rock.
- Accessory or non-essential mineral - this minerals are common, sometimes major part of, but are not always present.

Actuality: 06. Feb 2025 - 23:08:27

Locations with GPS information

IDs

GUSID (Global unique identifier short form) de_ducmbz0GCKNBZzuuEVA
GUID (Global unique identifier) B9DDEF75-9BC9-41CF-8228-D059CEEB8454
Database ID 71