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Gatedalite

Collectors Summary

Color grau
Lustre Halbmetallglanz
Crystal System tetragonal, I41/acd

Chemism

Chem­ical formula

ZrMn2+2Mn3+4SiO12

Empir­ical formula (anal­y­sis)

(Zr4+0.49Mn2+0.40Mg0.07Ca0.02Zn0.01Ce3+0.01)Σ1.00(Mn3+4.44Fe3+0.59Mn2+0.57Mg0.41Al0.01)Σ6.02Si0.99O12

Chem­ical com­po­si­tion

Mangan, Silicium, Zirconium, Sauerstoff

Unit weight: 609.454277841 u; Number of atoms in the formula: 20.01

Info

Empirical formula:

(Zr0.49Mn0.40Mg0.07Ca0.02Zn0.01Ce0.01)(Mn4.44Fe0.59Mn0.57Mg0.41Al0.01)Si0.99O12

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Oxygen

O

31.50

12

59.97

15.9994300

191.9931600
Magnesium

Mg

1.91

0.48

2.40

24.3050600

11.6664288
Aluminium

Al

0.04

0.01

0.05

26.9815382

0.2698154
Silicon

Si

4.56

0.99

4.95

28.0855300

27.8046747
Calcium

Ca

0.13

0.02

0.10

40.0784000

0.8015680
Manganese

Mn

48.77

5.41

27.04

54.9380499

297.2148500
Iron

Fe

5.41

0.59

2.95

55.8452000

32.9486680
Zinc

Zn

0.11

0.01

0.05

65.4094000

0.6540940
Zirconium

Zr

7.33

0.49

2.45

91.2242000

44.6998580
Cerium

Ce

0.23

0.01

0.05

140.1161000

1.4011610

Strunz 9th edi­tion incl. updates

9.AG.05

9: Silikate (Germanate)
A: Inselsilikate (Nesosilikate)
G: Insel(Neso)silikate mit zusätzlichem Anionen; Kationen in meist [6] und > [6] Koordination
05:Braunit-Gruppe

Lapis Clas­sifica­tion

VIII/B.09-015

VIII: SILIKATE
B: Inselsilikate mit tetraederfremden Anionen

Clas­sifica­tion by Hölzel

9.AG.230

9: SILICATES
A: Nesosilicates
G: Nesosilicates with Cation: O
2: Braunite-Group

IMA sta­tus

anerkannt - CNMNC Newsletter No. 18, Dezember 2013

Min­eral sta­tus

anerkanntes Mineral

IMA Classification

IMA Clas­sifica­tion

 Braunite group

Optical Properties

Color

grau

Diaphane­ity (Trans­parency)

opak

Lus­tre

Halbmetallglanz

Anisotropism

schwach

Crystallography

Crystal Sys­tem

tetragonal

Class (H-M)

4/mmm

Space Group number

142

Space Group

I41/acd

Cell param­e­ters a (Å)

9.4668

Cell param­e­ters b (Å)

-

Cell param­e­ters c (Å)

18.8701

Cell param­e­ters a/b or c/a

1.993

Cell param­e­ters c/b

-

Cell param­e­ters α

90°

Cell param­e­ters β

90°

Cell param­e­ters γ

90°

Z

8

Volumne (ų)

1691.144

Kristall struc­ture

Braunit-Gruppe; Struktur bestimmt

X-Ray Pow­der Diffrac­tion

5.460(6), 2.730(100), 2.367(12), 2.359(6), 1.6735(12), 1.671(29), 1.427(16), 1.423(10)
XRD chart Gatedalite

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

Crystal Structure 3D

Open larger view

Physical Properties

Density (g/cm³)

4.783 (berechnet)

4.787 ( ρ calc. Mineralienatlas )

(Co-)Type locality

(Co-)Type locality

Schweden/Värmland, Provinz/Filipstad, Gemeinde/Långban, Distrikt/Långban Fe-Mn-(Ba-As-Pb-Sb) Lagerstätte

Type mate­r­ial

Dipartimento di Chimica, University of Milan, Milan, Italien

Col­lec­tion number of type mate­r­ial

2013-04

Preface

Name from

dem Sammler Kjell Gatedal (geb. 1947) aus Nora, Örebro, Schweden, für seine Beiträge zum Wissen über die Mineralogie von Lagerstättten des Långban-Typs.

References

Hålenius, U., Bosi, F. (2014) Color of Mn-bearing gahnite: A first example of electronic transitions in heterovalent exchange coupled IVMn2+-VIMn3+ pairs in minerals. American Mineralogist, in press. 10.2138/am.2014.4670.

Hålenius, U. und Bosi, F. (2013) Gatedalite, IMA 2013-091. CNMNC Newsletter No. 18, December 2013, page 3256; Mineralogical Magazine, 77, 3249-3258.

Hålenius, Ulf ; Bosi, Ferdinando - Gatedalite, Zr(Mn2+2Mn3+4)SiO12, a new mineral species of the braunite group from Långban, Sweden - Mineralogical Magazine 30. Juli 2015 (online)

IMA group assignments

Other languages

German

Gatedalit

English

Gatedalite

Russian

Гатедалит

CNMNC (IMA)-Number

IMA 2013-091

CNMNC symbol

Symbol

Gtd

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

German pages

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

English pages

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

Russian pages

 Webmineral.ru - search for: Гатедалит

Mineral Dealer

German pages

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Crystal-Treasure.com - search for: Gatedalit
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Geolitho marketplace, by and for collectors - search for: Gatedalit

Locations with GPS information