Bandylite Mineral Data

General Bandylite Information

Chemical Formula:

CuB(OH)4Cl

Composition:

Molecular Weight = 177.84 gm

Copper 35.73 % Cu 44.73 % CuO

Boron 6.08 % B 19.57 % B₂O₃

Hydrogen 2.27 % H 20.26 % H₂O

Chlorine 19.94 % Cl 19.94 % Cl

- % Cl -4.50 % -O=Cl₂

Oxygen 35.99 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

CuB(OH)₄Cl

Environment:

Secondary origin, in a leached zone above massive iron sulfates.

IMA Status:

Valid Species (Pre-IMA) 1938

Locality:

Quetena, west of Calama, and near Taltal, Antofagasta, Chile. Link to MinDat.org Location Data.

Name Origin:

Named for Mark Chance Bandy (1900-1963), American mining engineer, mineralogist, and mineral collector, who first collected the mineral.

Name Pronunciation:

Bandylite + Pronunciation

Synonym:

ICSD 30610

PDF 12-631

Bandylite Image

Images:

Bandylite

Comments: Blue crystals of bandylite on quartz.
Location: QuetÃ©na mine, Calama, AntofagÃ¡sta Province, Chile. Scale: 8x5x3 cm.
© John Betts - Fine Minerals

Bandylite Crystallography

Axial Ratios:

a:c = 1:0.90879

Cell Dimensions:

a = 6.14, c = 5.58, Z = 2; V = 210.36 Den(Calc)= 2.81

Crystal System:

Tetragonal - Ditetragonal DipyramidalH-M Symbol (4/m 2/m 2/m) Space Group: P 4/nmm

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 5.59(1), 2.54(0.8), 3.08(0.8),

Forms:

Mouse
Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize
Keyboard
S - Stereo
I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu
Help on Above

Forms: ( 0 1 1) ( 0 1 2) ( 1 1 1) ( 1 1 0) ( 2 2 1) ( 0 2 1) ( 1 0 0) ( 0 0 1)

Warning: this large pop-up is very compute intensive and may not work well with some computers.

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Li Y , Burns P C , The Canadian Mineralogist , 38 (2000) p.713-715, Refinement of the structure of bandylite

View Additional jPOWD Structure files for Bandylite
[1]

Physical Properties of Bandylite

Cleavage:

{001} Perfect

Color:

Dark blue.

Density:

2.81

Diaphaneity:

Translucent

Fracture:

Flexible - Flexible fragments.

Hardness:

2.5 - Finger Nail

Luster:

Vitreous - Pearly

Streak:

light blue

Optical Properties of Bandylite

Gladstone-Dale:

CI meas= 0.052 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.052 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.237,KPDmeas= 0.237,KC= 0.25
Ncalc = 1.7

Optical Data:

Uniaxial (?), a=1.641, b=1.691, bire=0.0500.

Calculated Properties of Bandylite

Electron Density:

Bulk Density (Electron Density)=2.75 gm/cc
note: Specific Gravity of Bandylite =2.81 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Bandylite= 16.81 barns/electron
U=PE_Bandylite x rElectron Density= 46.21 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Bandylite is Not Radioactive

Bandylite Classification

Dana Class:

25.01.04.02 (25)Anhydrous Borates Containing Hydroxyl or Halogen

(25.01)Dana Type

(25.01.04)Dana Group

25.01.04.01 Teepleite Na2B(OH)4Cl P 4/nmm 4/m 2/m 2/m

25.01.04.02 Bandylite CuB(OH)4Cl P 4/nmm 4/m 2/m 2/m

Strunz Class:

06.AC.35 06 - BORATES

06.A - Monoborates

06.AC -B(O,OH)4, without and with additional anions; 1(T), 1(T)+OH, etc.

06.AC.35 Bandylite CuB(OH)4Cl P 4/nmm 4/m 2/m 2/m

Other Bandylite Information

References:

NAME( AntBidBlaNic5) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Bandylite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

Search for Bandylite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Bandylite :

A Bijoux Google Search for Bandylite
Adam's Minerals Google Search for Bandylite
Cape Minerals Google Search for Bandylite
Dakota Matrix Minerals Google Search for Bandylite
Excalibur Mineral Corp. Google Search for Bandylite
Exceptional Minerals Google Search for Bandylite
John Betts Fine Minerals Search for Bandylite
McDougall Minerals Google Search for Bandylite
Mineral News Website Link
Rock and Mineral Shows Google Search for Bandylite
Weinrich Minerals, Inc. Google Search for Bandylite

Ask about Bandylite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Bandylite Specimen Label here :

Bandylite

CuB(OH)4Cl
Dana No: 25.01.04.02 Strunz No: 06.AC.35
Locality:

Notes: