'._('einklappen').'
 

Bredigite

Pictures (1 Images total)

Bredigit
Views (Image: 1300971393): 1945
Bredigit

Durch Hämatit rötlichbraun gefärbter Bredigit in gehlenitreicher, heller Matrix. Fundort: Steinbruch Bellerberg, Ettringen, Eifel, Rheinland-Pfalz, Deutschland. Bildbreite: 3 mm.

Collection: raritätenjäger
Copyright: raritätenjäger
Contribution: raritätenjäger 2011-03-24
Locality: Ettringer Bellerberg (Stbr. Caspar) / Bellerberg / Ettringen / Mayen / Mayen-Koblenz-Kreis / Rheinland-Pfalz / Deutschland

Collectors Summary

Color farblos, grau
Streak color weiß
Cleavages schlecht
Solubility +++ Säuren
Crystal System orthorhombisch, Pnnm

Chemism

Chem­ical formula

Ca7Mg(SiO4)4

Empir­ical formula (anal­y­sis)

(Ca7.006Na0.015Ba0.014)Σ7.035Mg0.938(Si4.000P0.014)Σ4.014O16

Chem­ical com­po­si­tion

Calcium, Magnesium, Silicium, Sauerstoff

Unit weight: 674.6214836898 u; Number of atoms in the formula: 27.987

Info

Empirical formula:

(Ca7.006Na0.015Ba0.014)5Mg0.938(Si4.000P0.014)4O16

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Oxygen

O

37.95

16

57.17

15.9994300

255.9908800

Sodium

Na

0.05

0.02

0.05

22.9897702

0.3448466

Magnesium

Mg

3.38

0.94

3.35

24.3050600

22.7981463

Silicon

Si

16.65

4

14.29

28.0855300

112.3421200

Phosphorus

P

0.06

0.01

0.05

30.9737612

0.4336327

Calcium

Ca

41.62

7.01

25.03

40.0784000

280.7892704

Barium

Ba

0.28

0.01

0.05

137.3277000

1.9225878

Strunz 9th edi­tion incl. updates

9.AD.20

9: Silikate (Germanate)
A: Inselsilikate (Nesosilikate)
D: Insel(Neso)silikate ohne weitere Anionen; Kationen in oktahedraler [6] und gewöhnlich größerer Koordination
20:Bredigit-Gruppe

Lapis Clas­sifica­tion

VIII/A.07-020

VIII: SILIKATE
A: Inselsilikate mit [SiO4] 4--Baugruppen
7: Kationen in oktaedrischer Koordination [6]

Clas­sifica­tion by Hölzel

9.AB.280

9: SILICATES
A: Nesosilicates
B: Olivine-Group

Dana 8th edi­tion

51.04.01.01

51: Nesosilicate Minerals
04: Nesosilicates Nesosilicate Insular SiO4 Groups Only with cations in [6] and >[6] coordination

IMA sta­tus

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

Min­eral sta­tus

anerkanntes Mineral

Optical Properties

Color

farblos, grau

Streak color

weiß

max. Birefrin­gence

0.013

Birefringence chart\! Bredigite title=Birefringence chart Bredigite

Michel-Levy Color Chart viewed according to the maximum birefringence (at 30μm). Mineral color is not taken into account. Click on the image to enlarge or change thickness.

RI value α / ω / n

1.712

RI value β

1.716

RI value γ / ε

1.725

Ri mean

1.718

2V angle

Biaxial (+) 30°~

Crystallography

Crystal Sys­tem

orthorhombisch

Class (H-M)

mmm

Space Group number

58

Space Group

Pnnm

Cell param­e­ters a (Å)

18.38102(17)

Cell param­e­ters b (Å)

6.74936(7)

Cell param­e­ters c (Å)

10.90328(11)

Cell param­e­ters a/b or c/a

2.723

Cell param­e­ters c/b

1.615

Cell param­e­ters α

90°

Cell param­e­ters β

90°

Cell param­e­ters γ

90°

Z

4

Volumne (ų)

1352.662

X-Ray Pow­der Diffrac­tion

2.736(100),
2.728(100),
2.672(100),
2.233(30),
2.215(20),
1.924(30),
1.899(20),
1.562(20)

XRD chart Bredigite

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)

3.40 (gemessen)

3.312 ( ρ calc. Mineralienatlas )

Cleav­ages

schlecht

Insta­bil­ity

+++ Säuren

(Co-)Type locality

(Co-)Type locality

UK/Nordirland/Antrim Co./Larne/Scawt Hill

Preface

Author (Name, Year)

Tilley & Vincent, 1948

References

Mineralogical Magazine 28 (1948), 255

CNMNC Newsletter No. 50; Mineralogical Magazine, 31 [Formel]

Volker Kahlenberg, Irina Galuskina, Biljana Krüger, Anuschka Pauluhn & Evgeny Galuskin - Structural investigations on bredigite from the Hatrurim Complex - Mineralogy and Petrology volume 113, 261–272 (2019)

Kahlenberg, V., Prosser, L., Salzmann, M.F. et al. On the incorporation of strontium into the crystal structure of bredigite: structural effects and phase transition. Miner Petrol (2021). https://doi.org/10.1007/s00710-021-00771-x

Related minerals "Strunz Classification" (9. Edition) [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

Bredigite

Ca7Mg(SiO4)4

orthorhombisch : mmm : Pnnm

9.AD.20

Related minerals "Lapis Classification" [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

Merwinite

Ca3Mg(SiO4)2

monoklin : 2/m : P21/a

VIII/A.07-010

Bredigite

Ca7Mg(SiO4)4

orthorhombisch : mmm : Pnnm

VIII/A.07-020

Larnite

Ca2SiO4

monoklin : 2/m : P21/n

VIII/A.07-030

Calcio-olivine

Ca2SiO4

orthorhombisch : mmm : Pnma

VIII/A.07-040

Related minerals "Hoelzel Classification" [Mineral | Chemical formula : Crystal system : Class (H-M) | Space Group | Indenture number]

Tephroite

Mn2SiO4

orthorhombisch : mmm : Pbnm

9.AB.200

Wadsleyite

(Mg,Fe2+)2SiO4

orthorhombisch : mmm : Imma

9.AB.260

Bredigite

Ca7Mg(SiO4)4

orthorhombisch : mmm : Pnnm

9.AB.280

Related minerals "Dana 8. Classification" [Mineral | Chemical formula : Crystal system : Class (H-M) | Space Group | Indenture number]

Bredigite

Ca7Mg(SiO4)4

orthorhombisch : mmm : Pnnm

51.04.01.01

Merwinite

Ca3Mg(SiO4)2

monoklin : 2/m : P21/a

51.04.02.01

Pyrope

{Mg3}[Al2](Si3)O12

kubisch : m3m : Ia3d

51.04.03a.01

Almandine

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

kubisch : m3m : Ia3d

51.04.03a.02

Spessartine

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

kubisch : m3m : Ia3d

51.04.03a.03

Knorringite

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

kubisch : m3m : Ia3d

51.04.03a.04

Majorite

Mg3(MgSi)(SiO4)3

51.04.03a.05

Calderite

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

kubisch : m3m : Ia3d

51.04.03a.06

Andradite

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

kubisch : m3m : Ia3d

51.04.03b.01

Grossular

{Ca3}[Al2](Si3)O12

kubisch : m3m : Ia3d

51.04.03b.02

Uvarovite

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

kubisch : m3m : Ia3d

51.04.03b.03

Goldmanite

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

kubisch : m3m : Ia3d

51.04.03b.04

Schorlomite

{Ca3}[Ti2](SiFe3+2)O12

kubisch : m3m : Ia3d

51.04.03c.01

Kimzeyite

{Ca3}[Zr2](SiAl2)O12

kubisch : m3m : Ia3d

51.04.03c.02

Morimotoite

{Ca3}[TiFe2+](Si3)O12

kubisch : m3m : Ia3d

51.04.03c.03

'Hibschite' (Var.v. Grossular)

Ca3Al2(SiO4)3-x(OH)4*x {x<0.2-1.5}

kubisch : m3m : Ia3d

51.04.03d.01

Katoite

{Ca3}[Al2](☐3)(OH)12

kubisch : m3m : Ia3d

51.04.03d.02

Henritermierite

{Ca3}[Mn3+2](Si2)(☐)O8(OH)4

tetragonal : 4/mmm : I41/acd

51.04.04.01

Wadalite

Ca6Al5Si2O16Cl3

kubisch : 43m : I43d

51.04.05.01

Rondorfite

Ca8Mg[Cl2|(SiO4)4]

kubisch : m3 : Fd3

51.04.06.01

Other languages

German

Bredigit

Spanish

Bredigita

French

Bredigite

English

Bredigite

Russian

Бредигит

CNMNC symbol

Symbol

Bdi

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

German pages

DeWikiPedia - search for: Bredigit
Google-Bilder-Suche - search for: Bredigit
Mineralogisch-Petrographisches-Institut Hamburg - search for: Bredigit

English pages

Mindat - search for: Bredigite
Webmineral - search for:Bredigite
Handbook-of-Mineralogy - search for: Bredigite
RRUFF - Raman, XRD and other mineral data - search for: Bredigite
RRUFF - References and PDF downloads - search for: Bredigite
American-Mineralogist-Crystal-Structure-Database - search for: Bredigite
Athena - search for: Bredigite
Strahlen.org - search for: Bredigite
Mineralienatls.de (Forum) - search for: Bredigit

Russian pages

Webmineral.ru - search for: Бредигит

Mineral Dealer

German pages

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

Locations with GPS information