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Burckhardtite

Pictures (2 Images total)

Burckhardtit
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Burckhardtit

Bildbreite: 0,3 mm; Fundort: Bambolla Mine, Moctezuma, Sonora, Mexiko
Copyright: Christian Rewitzer
Contribution: Hg 2012-02-07
Locality: Bambolla Mine (Moctezuma Mine) / Moctezuma / Moctezuma, Municipio / Sonora / Mexiko
Burckhardtit
Views (Image: 1113108073): 841
Burckhardtit

Krusten winziger undeutlicher Kristalle; Bildbreite: 2 cm; Fundort: Bambolla Mine, Moctezuma, Sonora, Mexiko
Collection: Peter Haas
Copyright: Peter Haas
Contribution: Mineralienatlas 2005-04-10
Locality: Bambolla Mine (Moctezuma Mine) / Moctezuma / Moctezuma, Municipio / Sonora / Mexiko

Collectors Summary

Color karminrot, violettrot, sehr winzig auch pink
Streak color blassrot
Lustre Dimantglanz, Perlglanz
Hardness (Mohs) 2
Cleavages vollkommen {001}
Solubility - heiße HCl
Crystal System trigonal, P31m
Morphology winzige Rosetten von im Schnitt 0.1 mm, auch hexagonale Plättchen

Additional information / Summary

Ursprünglich wurde angenommen das Mineral sei glimmerartig Pb2(Fe3+,Mn3+)Te4+(AlSi3)O12(OH)2·H2O. Die ermittelte Struktur zeigt aber dass Te 6+ ist, die Formel wasserfrei ist, es ein Doppel-Schichtsilikat ist und das Aluminiumsilikat Anion dem von Kampfit und Cymrit ähnelt.

Chemism

Chem­ical formula

Pb2(Fe3+Te6+)[AlSi3O8]O6

Chem­ical com­po­si­tion

Aluminium, Blei, Eisen, Silicium, Tellur, Sauerstoff

Unit weight: 933.0983482 u; Number of atoms in the formula: 22

Info

Empirical formula:

Pb2(FeTe)[AlSi3O8]O6

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Oxygen

O

24.01

14

63.64

15.9994300

223.9920200
Aluminium

Al

2.89

1

4.55

26.9815382

26.9815382
Silicon

Si

9.03

3

13.64

28.0855300

84.2565900
Iron

Fe

5.98

1

4.55

55.8452000

55.8452000
Tellurium

Te

13.68

1

4.55

127.6030000

127.6030000
Lead

Pb

44.41

2

9.09

207.2100000

414.4200000

Strunz 9th edi­tion incl. updates

9.EC.70

9: Silikate (Germanate)
E: Schichtsilikate (Phyllosilikate)
C: Schichtsilikate (Phyllosilikate) mit Glimmer Tafeln, zusammengesetzt aus tetrahedralen oder octahedralen Netzen
70:Burckhardtit-Gruppe

Lapis Clas­sifica­tion

VIII/H.32-010

VIII: SILIKATE
H: Schichtsilikate
32: Schichtsilikate mit anderen Einfachschichten [Si6O15] 6- u.a.

Clas­sifica­tion by Hölzel

9.ES.340

9: SILICATES
E: Phyllosilicates
S: Phyllosilicates with tetrahedral Doublelayers

Hey's Chem­ical Index of Min­er­als

16.14.17

16: Silicates Containing Aluminum and other Metals
14: Aluminosilicates of Ti, Zr, Sn and Pb

Dana 8th edi­tion

78.05.03.01

78: Unclassified Silicate Minerals
05: Unclassified silicates possible phyllosilicates

IMA sta­tus

Anerkannt von der CNMNC

Min­eral sta­tus

anerkanntes Mineral

Optical Properties

Color

karminrot, violettrot, sehr winzig auch pink

Streak color

blassrot

Diaphane­ity (Trans­parency)

transparent

Lus­tre

Dimantglanz, Perlglanz

max. Birefrin­gence

0.03
Birefringence chart\! Burckhardtite title=Birefringence chart Burckhardtite

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

1.82

RI value β

1.85

RI value γ / ε

1.85

Ri mean

1.84

2V angle

Biaxial (-) nd

Optical Data Luminescence

Lumi­nes­cence

keine Fluoreszenz in UV

Crystallography

Crystal Sys­tem

trigonal

Class (H-M)

3m

Space Group number

162

Space Group

P31m

Cell param­e­ters a (Å)

5.2566(5)

Cell param­e­ters b (Å)

-

Cell param­e­ters c (Å)

13.0221(10)

Cell param­e­ters a/b or c/a

2.477

Cell param­e­ters c/b

-

Z

1

Volumne (ų)

311.617

X-Ray Pow­der Diffrac­tion

13.03(83),
4.547(17),
4.294(18),
3.730(81),
3.141(100),
2.627(60),
2.578(10),
2.433(4),
2.262(29),
2.151(30),
2.0164(21),
1.9557(5),
1.8497(38),
1.7148(8),
1.6680(33),
1.5992(29),
1.5684(3),
1.5309(12),
1.5155(17),
1.4356(5),
1.3233(8),
1.3120(15)
XRD chart Burckhardtite

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

Morphol­ogy

winzige Rosetten von im Schnitt 0.1 mm, auch hexagonale Plättchen

Crystals 3D

Open larger view

Physical Properties

Hard­ness (Mohs)

2

VHN (Hard­ness Vick­ers)

32 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

4.96 (berechnet)

4.972 ( ρ calc. Mineralienatlas )

Cleav­ages

vollkommen {001}

Tenac­ity

spröde

Insta­bil­ity

- heiße HCl

(Co-)Type locality

(Co-)Type locality

Mexiko/Sonora/Moctezuma, Municipio/Moctezuma

Type mate­r­ial

Smithsonian Institution , Harvard University, University of Delaware, USA

Col­lec­tion number of type mate­r­ial

NMNH No. 144110

Preface

Name from

zu Ehren von Carl "Carlos" Emanuel Burckhardt (26. März 1869 Basel, Schweiz, bis 26. August 1935 Mexiko), Mexikanischer Geologe und Paläontologe.

Author (Name, Year)

Gaines & Leavens & Nelen, 1979

Addi­tional Informa­tion

paramagnetisch

References

American Mineralogist 64 (1979), 355

Andrew G. Christy1, Anthony R. Kampf, Stuart J. Mills, Robert M. Housley and Brent Thorne - Crystal structure and revised chemical formula for burckhardtite, Pb2(Fe3+Te6+)[AlSi3O8]O6: a double-sheet silicate with intercalated phyllotellurate layers - Mineralogical Magazine, 78 (2014), 1763-1773

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

Burckhardtite

Pb2(Fe3+Te6+)[AlSi3O8]O6

trigonal : 3m : P31m

9.EC.70

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

Plumbophyllite

Pb2Si4O10·H2O

orthorhombisch : mmm : Pbcn

VIII/H.32-005

Burckhardtite

Pb2(Fe3+Te6+)[AlSi3O8]O6

trigonal : 3m : P31m

VIII/H.32-010

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

Wickenburgite

Pb3CaAl[Si10O27]·3H2O

trigonal : 3m : P31c

9.ES.300

Mathewrogersite

Pb7(Fe,Cu)Al3GeSi12O36·(OH,H2O)6

9.ES.320

Burckhardtite

Pb2(Fe3+Te6+)[AlSi3O8]O6

trigonal : 3m : P31m

9.ES.340

Britvinite

Pb7+xMg4.5[(Si,Al)5O14](BO3)(BO3,AsO4)(CO3)(OH,O)7

triklin : 1 : P1

9.ES.360

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

Ajoite

(Na,K)3Cu2+20Al3Si29O76(OH)16·8H2O

triklin : 1 : P1

 78.05.01.01

Bementite

Mn7Si6O15(OH)8

monoklin : 2/m : P21/c

 78.05.02.01

Burckhardtite

Pb2(Fe3+Te6+)[AlSi3O8]O6

trigonal : 3m : P31m

 78.05.03.01

Erlianite

Fe2+4Fe3+2Si6O15(OH)8

orthorhombisch : mm2, mmm : Pm21n, Pmmn

 78.05.05.01

Raite

Na3Mn32+Ti0.254+[OH|Si4O10]2·10H2O

monoklin : 2/m : C2/m

 78.05.08.01

Tungusite

Ca14Fe92+[(OH)22|(Si4O10)6]

triklin : 1 : P1

 78.05.09.01

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

Burckhardtite

Pb2(Fe3+Te6+)[AlSi3O8]O6

trigonal : 3m : P31m

 16.14.17

Other languages

German

Burckhardtit

Spanish

Burckhardtita

English

Burckhardtite

French

Burckhardtite

Russian

Буркхардтит

IMA Number

IMA 1976-052

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

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