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Bandylite (Bandylit)

Pictures (1 Images total)

Bandylit
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Bandylit
hellgrüne Krsuaten von Bandylit, Queténa Mine, Calama, Antofagasta, Chile; BB ~ 1,5 cm
Copyright: MinTreasure.com (Carsten Slotta); Contribution: openpit
Location: Chile/Antofagasta, Region (II. Region)/El Loa, Provinz/Calama/Chuquicamata District/Queténa Mine
Mineral: Bandylite
Image: 1579428627
License: Usage for Mineralienatlas project only
Bandylit

hellgrüne Krsuaten von Bandylit, Queténa Mine, Calama, Antofagasta, Chile; BB 1,5 cm
Copyright: MinTreasure.com (Carsten Slotta)
Contribution: openpit 2020-01-19
Locality: Queténa Mine / Chuquicamata District / Calama / El Loa, Provinz / Antofagasta, Region (II. Region) / Chile

Collectors Summary

Color dunkelblau
Streak color hellblau
Hardness (Mohs) 2.5
Solubility +++ NH4OH, + HCl, HNO3, H2O
Crystal System tetragonal, P4/n

Chemism

Chemical formula

CuB(OH)4Cl

Chemical composition

Chlor, Kupfer, Bor, Sauerstoff, Wasserstoff

Unit weight: 177.840708 u; Number of atoms in the formula: 11

Info

Empirical formula:

CuB(OH)4Cl

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

2.27

4

36.36

1.0079470

4.0317880
Boron

B

6.08

1

9.09

10.8117000

10.8117000
Oxygen

O

35.99

4

36.36

15.9994300

63.9977200
Chlorine

Cl

19.94

1

9.09

35.4532000

35.4532000
Copper

Cu

35.73

1

9.09

63.5463000

63.5463000

Strunz 9th edition incl. updates

6.AC.35

6: Borate
A: Monoborate
C: B(O,OH)4, ohne und mit zusätzlichen [Anionen]; 1(T), 1(T)+OH, etc.
35:Bandylith-Gruppe

Lapis Classification

V/G.08-010

V: NITRATE, CARBONATE UND BORATE
G: Inselborate
8: [BO4] 5-- und [B(OH)4] 1--Tetraeder

Classification by Hölzel

6.AC.300

6: Borates
A: Monoborates
C:
3: Henmilite-Bandylite-Group (heterotypes)

Dana 8th edition

25.01.04.02

25: Anhydrous Borates Containing Hydroxyl or Halogen
01: Anhydrous Borates Containing Hydroxyl or Halogen

IMA status

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

Mineral status

anerkanntes Mineral

Optical Properties

Color

dunkelblau

Streak color

hellblau

Diaphaneity (Transparency)

durchscheinend

max. Birefringence

0.050
Birefringence chart\! Bandylite title=Birefringence chart Bandylite

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

1.691

RI value γ / ε

1.641

Ri mean

1.674

2V angle

Uniaxial (-)

Crystallography

Crystal System

tetragonal

Class (H-M)

4/m

Space Group number

85

Space Group

P4/n

Cell parameters a (Å)

6.171

Cell parameters b (Å)

-

Cell parameters c (Å)

5.587

Cell parameters a/b or c/a

0.905

Cell parameters c/b

-

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

2

Volumne (ų)

212.76

X-Ray Powder Diffraction

5.59(100),
4.35(60),
4.13(50),
3.08(80),
2.54(80),
1.952(70),
1.655(60),
1.457(50)
XRD chart Bandylite

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

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

2.5

VHN (Hardness Vickers)

53 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.81

2.776 ( ρ calc. Mineralienatlas )

Instability

+++ NH4OH, + HCl, HNO3, H2O

(Co-)Type locality

(Co-)Type locality

Chile/Antofagasta, Region (II. Region)/El Loa, Provinz/Calama/Chuquicamata District/Queténa Mine

Preface

Author (Name, Year)

Palache & Foshag, 1938

References

Handbook of Mineralogy (Anthony et al.), 3 (1997), 35

Other languages

Spanish

Bandylita

English

Bandylite

French

Bandylite

German

Bandylith

Russian

Бандилит

Japanese

ﾊﾞﾝﾃﾞｨﾙ鉱

Alternative Name

Bandylit

CNMNC symbol

Symbol

Bny