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Almandine (Almandin)

Pictures (237 Images total)

Almandin
Views (Image: 1563102492): 4852
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
Almandin
Views (Image: 1350943647): 15422, Rating: 9.3
Almandin (SNr: EM 3243)

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

Collection: loparit
Copyright: loparit
Contribution: loparit 2012-10-23
Locality: Emmelberg / Üdersdorf / Daun / Vulkaneifel, Landkreis / Rheinland-Pfalz / Deutschland
Almandin
Views (Image: 1350651061): 7289, Rating: 8.71
Almandin

Kerber-Bruch, Tittling, Bayern, Bildbreite 3mm

Collection: Georg Prock
Copyright: Georg Prock
Contribution: Gepro 2012-10-19
Locality: Kerberbruch / Stützersdorf / Tittling / Passau, Landkreis / Niederbayern, Bezirk / Bayern / Deutschland
Almandin
Views (Image: 1283763844): 13718
Almandin

Größe: 4,87 mm; Fundort: Coderatal, Novate Mezzola, Sondrio, Provinz, Lombardei (Lombardia), Region, Italien

Copyright: Matteo Chinellato
Contribution: Hg 2010-09-06
Locality: Coderatal / Novate Mezzola / Sondrio, Provinz / Lombardei (Lombardia), Region / Italien
Almandine
Views (Image: 1576132640): 1282
Almandine

Almandine crystal on rhyolite matrix, from Garnet Hill, Ely, Robinson District, White Pine Co., Nevada, USA; Dimensions: 57 mm x 52 mm x 36 mm

Copyright: pegmatite
Contribution: pegmatite 2019-12-12
Locality: Garnet Hill / Ely / Robinson District / White Pine Co. / Nevada / USA
Almandin
Views (Image: 1408958530): 4017
Almandin

Größe: 0,93 mm; Fundort: Grube Clara, Wolfach, Schwarzwald, Baden-Württemberg, Deutschland

Copyright: Matteo Chinellato
Contribution: Hg 2014-08-25
Locality: Grube Clara / Oberwolfach / Ortenaukreis / Freiburg, Bezirk / Baden-Württemberg / Deutschland

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

Volumne (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

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

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

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

German pages

DeWikiPedia - search for: Almandin
Google-Bilder-Suche - search for: Almandin
Mineralienatlas.de (Forum) - search for: Almandin

English pages

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

Russian pages

Webmineral.ru - search for: Альмандин

Mineral Dealer

German pages

hausen - Mineralgroßhandel - search for: Almandin
Crystal-Treasure.com - search for: Almandin
Bosse - search for: Almandin
Edelsteine Neuburg - Gundolf Fischer - search for: Almandin

Locations with GPS information