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Andradite

Pictures (508 Images total)

Andradit
Views (File:
1464186769
): 10374, Rating: 9.6
Andradit
Andradite on Hedenbergite "Garnet Garden"; FOV = 80 mm; Serifos; Greece
Copyright: Andreas Schmid; Contribution: Andreas Schmid
Collection: Andreas Schmid
Location: Griechenland/Südliche Ägäis (Νότιο Αιγαίο)/Kykladen/Serifos, Insel
Mineral: Andradite, Hedenbergite
Image: 1464186769
Rating: 9.6 (votes: 10)
License: Usage for Mineralienatlas project only
Andradit

Andradite on Hedenbergite "Garnet Garden"; FOV = 80 mm; Serifos; Greece
Collection: Andreas Schmid
Copyright: Andreas Schmid
Contribution: Andreas Schmid 2016-05-25
Locality: Serifos, Insel / Kykladen / Südliche Ägäis (Νότιο Αιγαίο) / Griechenland
Andradite
Views (File:
1499881850
): 1244
Andradite
Andradite garnet specimen, from Mega Horio, Serifos Island, Cyclade Islands, Kykládes Prefecture, Aegean Islands Department, Greece; Size 53 x 45 x 42 mm
Copyright: pegmatite; Contribution: pegmatite
Location: Griechenland/Südliche Ägäis (Νότιο Αιγαίο)/Kykladen/Serifos, Insel/Mega Horio (Megalo Horio; Mia Horio; Mega Khorio; Mega Korio)
Mineral: Andradite
Image: 1499881850
Rating: 10 (votes: 3)
License: Usage for Mineralienatlas project only
Andradite

Andradite garnet specimen, from Mega Horio, Serifos Island, Cyclade Islands, Kykládes Prefecture, Aegean Islands Department, Greece; Size 53 x 45 x 42 mm
Copyright: pegmatite
Contribution: pegmatite 2017-07-12
Locality: Mega Horio (Megalo Horio; Mia Horio; Mega Khorio; Mega Korio) / Serifos, Insel / Kykladen / Südliche Ägäis (Νότιο Αιγαίο) / Griechenland
Andradite
Views (File:
1382198460
): 501
Andradite
Perfect specimen of green colored Andradite garnet, that was collected many years ago at well known locality - Sinerechenskoe skarn occurrence, Sinerechenskiy Mine, Kavalerovo Mining District, Dalnegorsk, Primorskiy Kray, Far-Eastern Region, Russia; Size 85 x 62 x 57 mm
Copyright: pegmatite; Contribution: pegmatite
Collection: pegmatite
Location: Russland/Ferner Osten, Föderationskreis/Primorje, Region (Primorskiy Kray)/Kavalerovo/Sinerechenskoe (Sinerechenskiy; Sinerechenskoye; Blue River)
Mineral: Andradite
Image: 1382198460
Rating: 9.5 (votes: 2)
License: Usage for Mineralienatlas project only
Andradite

Perfect specimen of green colored Andradite garnet, that was collected many years ago at well known locality - Sinerechenskoe skarn occurrence, Sinerechenskiy Mine, Kavalerovo Mining District, Daln...
Collection: pegmatite
Copyright: pegmatite
Contribution: pegmatite 2013-10-19
Locality: Sinerechenskoe (Sinerechenskiy; Sinerechenskoye; Blue River) / Kavalerovo / Primorje, Region (Primorskiy Kray) / Ferner Osten, Föderationskreis / Russland
Andradit
Views (File:
1403525469
): 1355
Andradit
Bildbreite: 3 mm; Fundort: Nickenicher Sattel, Nickenich, Eifel, Rheinland-Pfalz, Deutschland
Copyright: Stephan Wolfsried; Contribution: Hg
Location: Deutschland/Rheinland-Pfalz/Mayen-Koblenz-Kreis/Pellenz, Verbandsgemeinde/Nickenich/Nickenicher Sattel (Eicher Sattel)
Mineral: Andradite
Image: 1403525469
Rating: 9.5 (votes: 2)
License: Usage for Mineralienatlas project only
Andradit

Bildbreite: 3 mm; Fundort: Nickenicher Sattel, Nickenich, Eifel, Rheinland-Pfalz, Deutschland
Copyright: Stephan Wolfsried
Contribution: Hg 2014-06-23
Locality: Nickenicher Sattel (Eicher Sattel) / Nickenich / Pellenz, Verbandsgemeinde / Mayen-Koblenz-Kreis / Rheinland-Pfalz / Deutschland
Andradite
Views (File:
1499842056
): 484
Andradite
Andradite garnet specimen, from Mega Horio, Serifos Island, Cyclade Islands, Kykládes Prefecture, Aegean Islands Department, Greece; Size 72 x 61 x 42 mm
Copyright: pegmatite; Contribution: pegmatite
Location: Griechenland/Südliche Ägäis (Νότιο Αιγαίο)/Kykladen/Serifos, Insel/Mega Horio (Megalo Horio; Mia Horio; Mega Khorio; Mega Korio)
Mineral: Andradite
Image: 1499842056
Rating: 10 (votes: 2)
License: Usage for Mineralienatlas project only
Andradite

Andradite garnet specimen, from Mega Horio, Serifos Island, Cyclade Islands, Kykládes Prefecture, Aegean Islands Department, Greece; Size 72 x 61 x 42 mm
Copyright: pegmatite
Contribution: pegmatite 2017-07-12
Locality: Mega Horio (Megalo Horio; Mia Horio; Mega Khorio; Mega Korio) / Serifos, Insel / Kykladen / Südliche Ägäis (Νότιο Αιγαίο) / Griechenland
Andradit
Views (File:
1253694306
): 607
Andradit
Bildbreite: 2,5 mm; Fundort: Montenero, Onano, Viterbo, Latium, Italien
Copyright: Stephan Wolfsried; Contribution: Hg
Location: Italien/Latium (Lazio), Region/Viterbo, Provinz/Onano/Montenero (Pozzolana) Steinbruch
Mineral: Andradite
Image: 1253694306
Rating: 10 (votes: 1)
License: Usage for Mineralienatlas project only
Andradit

Bildbreite: 2,5 mm; Fundort: Montenero, Onano, Viterbo, Latium, Italien
Copyright: Stephan Wolfsried
Contribution: Hg 2009-09-23
Locality: Montenero (Pozzolana) Steinbruch / Onano / Viterbo, Provinz / Latium (Lazio), Region / Italien

You find additional specimen at the Geolitho Museum

Collectors Summary

Color rot, braun, gelb, grün, schwarz
Streak color weiß
Lustre Glasglanz, Melanit z.T. Halbmetallglanz
Hardness (Mohs) 6.5 - 7
Solubility +++ HF, warme HCl, Königswasser
Crystal System kubisch, Ia3d
Morphology Oft idiomorph ausgebildete Kristalle; Rhombendodekaeder, Deltoidalikositetraeder (Ikositetraeder) und Kombinationen von beiden

Additional information / Summary

Siehe auch Mineralienportrait: Granat - Andradit

Chemism

Chemical formula

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

Chemical composition

Calcium, Eisen, Silicium, Sauerstoff

Unit weight: 508.17535 u; Number of atoms in the formula: 20

Info

Empirical formula:

{Ca3}[Fe2](Si3)O12

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Oxygen

O

37.78

12

60.00

15.9994300

191.9931600
Silicon

Si

16.58

3

15.00

28.0855300

84.2565900
Calcium

Ca

23.66

3

15.00

40.0784000

120.2352000
Iron

Fe

21.98

2

10.00

55.8452000

111.6904000

Analysis wt%

SiO2 : 35.60, Fe2O3 : 30.70, Al2O3 : 1.26, CaO : 33.20, MnO : 0.87

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.08-110

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

Classification by Hölzel

9.AC.300

9: SILICATES
A: Nesosilicates
C: Garnet-Group
3: Andradite-Group - 6-coord. Fe(3+)

Dana 8th edition

51.04.03b.01

51: Nesosilicate Minerals
04: Nesosilicates Nesosilicate Insular SiO4 Groups Only with cations in [6] and >[6] coordination
03b: Garnet group (Ugrandite 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

rot, braun, gelb, grün, schwarz

Streak color

weiß

Diaphaneity (Transparency)

transparent-opak

Lustre

Glasglanz, Melanit z.T. Halbmetallglanz

RI value α / ω / n

1.887

Ri mean

1.887

2V angle

Isotropisch

Crystallography

Crystal System

kubisch

Class (H-M)

m3m

Space Group number

230

Space Group

Ia3d

Cell parameters a (Å)

12.052

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)

1750.561

X-Ray Powder Diffraction

3.015(60),
2.696(100),
2.462(40),
1.956(20),
1.673(20),
1.611(60),
1.316(20),
1.119(20)
XRD chart Andradite

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

Morphology

Oft idiomorph ausgebildete Kristalle; Rhombendodekaeder, Deltoidalikositetraeder (Ikositetraeder) und Kombinationen von beiden

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

6.5 - 7

VHN (Hardness Vickers)

1110 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

3.9 (gemessen)

3.856 ( ρ calc. Mineralienatlas )

Instability

+++ HF, warme HCl, Königswasser

(Co-)Type locality

(Co-)Type locality

Norwegen/Viken, Provinz/Drammen

Preface

Rareness

häufig

Name from

dem brasilianischen Mineralogen J.B. d'Andrada e Silva (1763-1838).

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 - [For

Author (Name, Year)

Dana, 1868

References

American Mineralogist 76 (1991), 1249.

Sytle M. Antao, Allison M. Klincker: Origin of birefringence in andradite from Arizona, Madagascar, and Iran. Physics and Chemistry of Minerals Vol. 40, Issue 7 (2013) S. 575–586.

IMA group assignments

Varieties

Demantoid

grüner Andradit

Hydroandradite

Melanite

Topazolite

Other languages

Dutch

Andradiet

German

Andradit

Spanish

Andradita

Lithuanian

Andraditas

French

Andradite

English

Andradite

Polish

Andradyt

Russian

Андрадит

Ukrainian

Андрадит

Japanese

灰鉄柘榴石

Simplified Chinese

钙铁榴石

Alternative Name

German

Allochroit

Spanish

Allochroita

Allochroite

Andradite Garnet

Spanish

Andradito

Aplom

Aplome

German

Calcium-Ferrigranat

Jellelite

Jellesite

Jelletite

German

Kalkeisengranat

Kalkeisentongranat

Polyadelphine

German

Polyadelphit

Spanish

Polyadelphita

Polyadelphite

Rothoffite

CNMNC symbol

Symbol

Adr

Locations with GPS information

IDs

GUSID (Global unique identifier short form) sro-yA-k8Uy-YkSUjBJi1A
GUID (Global unique identifier) C83EBAB2-A40F-4CF1-BE62-44948C1262D4
Database ID 122