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Danburite

Pictures (103 Images total)

Danburit
Views (Image: 1315906683): 3905
Danburit

Größe: 1,42 mm; Fundort: Scheiblinggraben, Kötschachtal, Gasteinertal, Hohe Tauern, Österreich

Collection: Domenico Preite
Copyright: Matteo Chinellato
Contribution: Hg 2011-09-13
Locality: Scheiblinggraben / Kötschachtal / Bad Gastein / Gasteinertal / St. Johann im Pongau, Bezirk / Salzburg / Österreich
Danburite
Views (Image: 1361810707): 3118
Danburite

Danburite specimen, from Charcas, Mun. de Charcas, San Luis Potosí, Mexico; Size 67 х 45 х 28 mm

Collection: pegmatite
Copyright: pegmatite
Contribution: pegmatite 2013-02-25
Locality: Charcas Mine / Charcas / Charcas, Municipio / San Luis Potosi / Mexiko
Danburit
Views (Image: 1391421379): 2591
Danburit

Bildbreite: 3 mm; Fundort: Plattenberg, Länta, Valsertal, Val Lugnez, Graubünden, Schweiz

Copyright: Stephan Wolfsried
Contribution: Hg 2014-02-03
Locality: Plattenberg / Länta-Hütte / Vals / Surselva, Region / Graubünden, Kanton / Schweiz
Danburit
Views (Image: 1315906737): 2521
Danburit

Größe: 1,61 mm; Fundort: Scheiblinggraben, Kötschachtal, Gasteinertal, Hohe Tauern, Österreich

Collection: Domenico Preite
Copyright: Matteo Chinellato
Contribution: Hg 2011-09-13
Locality: Scheiblinggraben / Kötschachtal / Bad Gastein / Gasteinertal / St. Johann im Pongau, Bezirk / Salzburg / Österreich
Danburit
Views (Image: 1225386989): 3919, Rating: 9
Danburit

Bildbreite: 2 mm; Fundort: Plattenberg, Länta, Valsertal, Val Lugnez, Graubünden, Schweiz

Copyright: Stephan Wolfsried
Contribution: Hg 2008-10-30
Locality: Plattenberg / Länta-Hütte / Vals / Surselva, Region / Graubünden, Kanton / Schweiz
Danburit
Views (Image: 1180702715): 2131
Danburit

Fundort: Charcas, San Luis Potosi, Mexiko; Größe: 35 x 30 x 20 mm

Collection: rtbstone
Copyright: rtbstone
Contribution: rtbstone 2007-06-01
Locality: Golconda District / Humboldt Co. / Nevada / USA

Collectors Summary

Color farblos, weiß, grau, bräunlich weiß, strohgelb
Streak color weiß
Lustre Glasglanz
Hardness (Mohs) 7
Cleavages undeutlich nach {001}
Fracture unebenen bis schwach muschelig; spröde
Solubility ++ HF, +- HCl
Crystal System orthorhombisch, Pnam
Morphology prismatisch (ähnlich Topas)

Chemism

Chem­ical formula

CaB2Si2O8

Chem­ical com­po­si­tion

Calcium, Silicium, Bor, Sauerstoff

Unit weight: 245.8683 u; Number of atoms in the formula: 13

Info

Empirical formula:

CaB2Si2O8

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Boron

B

8.79

2

15.38

10.8117000

21.6234000

Oxygen

O

52.06

8

61.54

15.9994300

127.9954400

Silicon

Si

22.85

2

15.38

28.0855300

56.1710600

Calcium

Ca

16.30

1

7.69

40.0784000

40.0784000

Anal­y­sis wt%

SiO2 : 48.55, B2O3 : 28.26, CaO : 22.87 (Ref: Zeitschrift ür Kristallographie 31)

Strunz 9th edi­tion incl. updates

9.FA.65

9: Silikate (Germanate)
F: Gerüstsilikate (Tektosilikate) ohne zeolithisches H2O
A: Gerüstsilikate (Tektosilicates) ohne weitere [Anionen]
65:Danburit-Gruppe

Lapis Clas­sifica­tion

VIII/J.08-020

VIII: SILIKATE
J: Gerüstsilikate (mit Zeolithen)
8: Ohne tetraederfremde Anionen

Clas­sifica­tion by Hölzel

9.FD.360

9: SILICATES
F: Tektosilicates
D: Plagioclase-Group

Hey's Chem­ical Index of Min­er­als

17.05.11

17: Silicates Containing other Anions
05: Borosilicates

Dana 8th edi­tion

56.03.01.01

56: Sorosilicates Sorosilicate Si2O7 Groups and O, OH, F. and H2O
03: Sorosilicates Sorosilicate Si2O7 Groups and O, OH, F. and H2O with [Si2O7] with borate groups
01: Danburite Goup

IMA sta­tus

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

Min­eral sta­tus

anerkanntes Mineral

Optical Properties

Color

farblos, weiß, grau, bräunlich weiß, strohgelb

Streak color

weiß

Diaphane­ity (Trans­parency)

transparent bis durchscheinend

Lus­tre

Glasglanz

max. Birefrin­gence

0.006

Birefringence chart\! Danburite title=Birefringence chart Danburite

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

1.630

RI value β

1.633

RI value γ / ε

1.636

Ri mean

1.633

2V angle

Biaxial (-) 88°

Optical Data Luminescence

Lumi­nes­cence

fluoreszierend

Color LW-UV (365nm)

 

blau

Color SW-UV (254nm)

 

blau

SW-UV Intensity

schwach

SW-UV Other Col­ors

 

grün

Most Common Acti­vator

Eu2+

Other Acti­vators

(UO2)2+ (Uranyl-Ion) als Verunreinigungen, Ce3+, Sm3+, Eu3+, Dy3+, Tb3+, Mn2+, Yb2+

After­glow (Per­sistant Lumi­nes­cence)

keine Daten

Tri­bo­lu­mi­nes­cence

vorhanden

Crystallography

Crystal Sys­tem

orthorhombisch

Class (H-M)

mmm

Space Group number

62

Space Group

Pnam

Cell param­e­ters a (Å)

8.041

Cell param­e­ters b (Å)

8.760

Cell param­e­ters c (Å)

7.737

Cell param­e­ters a/b or c/a

0.918

Cell param­e­ters c/b

0.883

Cell param­e­ters α

90°

Cell param­e­ters β

90°

Cell param­e­ters γ

90°

Z

4

Volumne (ų)

544.988

X-Ray Pow­der Diffrac­tion

3.65(30),
3.57(100),
3.44(30),
3.24(30),
2.961(80),
2.743(60),
2.729(40),
2.655(50)

XRD chart Danburite

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

Morphol­ogy

prismatisch (ähnlich Topas)

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hard­ness (Mohs)

7

VHN (Hard­ness Vick­ers)

1300 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.97 - 3.02 / Durchschnittlich = 2.99

2.996 ( ρ calc. Mineralienatlas )

Cleav­ages

undeutlich nach {001}

Frac­ture

unebenen bis schwach muschelig; spröde

Radioac­tiv­ity

keine

Insta­bil­ity

++ HF, +- HCl

Chem­ical Prop­er­ties and Tests

v.d.L schmelzbar, grüne Flammenfarbe, Schmelzkugel gelantiert in Salzsäure

(Co-)Type locality

(Co-)Type locality

USA/Connecticut/Fairfield Co./Danbury

Preface

Occurrences

auf Klüften und Gängen in metamorphen Gesteinen

Asso­cia­tions

Calcit, Dolomit, Glimmer, Chlorit, Augit, Quarz, Turmalin

Name from

der Typlokalität Danbury, Connecticut, USA

Author (Name, Year)

Shepard, 1839

Rel­evance, Usage

gelegentlich als Schmuckstein

References

Handbook of Mineralogy (Anthony et al.), 2 (1995), 176

Other languages

Dutch

Danburiet

Finnish

Danburiitti

German

Danburit

Spanish

Danburita

English

Danburite

French

Danburite

Polish

Danburyt

Russian

Данбурит

Ukrainian

Данбурит

Japanese

ダンブリ石

Traditional Chinese

賽黃晶

Simplified Chinese

赛黄晶

Alternative Name

Bementite (of Dana)

CNMNC symbol

Symbol

Dbu

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

German pages

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

English pages

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

Russian pages

Webmineral.ru - search for: Данбурит

Mineral Dealer

German pages

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

Locations with GPS information