Krennerite Mineral Data

Krennerite Mineral Data +

[Newest Minerals] [Minerals for Sale] [Tsumeb Mine] [Mineral Auctions] [Mineral Gallery]
The Mineral Gallery's Exceptional Specimens and Mineral Hall of Fame
Visa and Mastercard are Welcome

General Krennerite Information

Chemical Formula:

AuTe2

Composition:

Molecular Weight = 452.17 gm

Tellurium 56.44 % Te

Gold 43.56 % Au

______

100.00 %

Empirical Formula:

AuTe₂

Environment:

Found in hydrothermal veins with other tellurides.

IMA Status:

Valid Species (Pre-IMA) 1877

Locality:

Sacarâmb (Nagyág, Szekerembe), Transylvania, Romania. Link to MinDat.org Location Data.

Name Origin:

Named for Joseph A. Krenner (1839-1920), Hungarian mineralogist.

Synonym:

ICSD 30902

PDF 20-Aug

Krennerite Image

Images:

Krennerite

Comments: Metallic krennerite crystals on quartz.
Location: Emperor mine, Vatukoula, Viti Levu, Fiji. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Krennerite Crystallography

Axial Ratios:

a:b:c =1.8752:1:0.5056

Cell Dimensions:

a = 16.54, b = 8.82, c = 4.46, Z = 8; V = 650.64 Den(Calc)= 9.23

Crystal System:

Orthorhombic - PyramidalH-M Symbol (mm2) Space Group: Pma2

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

By Intensity(I/I_o): 3.03(1), 2.11(0.7), 2.94(0.6),

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 2 1] [ 1 1 1] [ 0 1 0] [ 1 2 0] [ 1 0 1] [ 1 1 0] [ 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

Tunell G , Murata K J , American Mineralogist , 35 (1950) p.959-984, The atomic arrangement and chemical composition of krennerite

View Additional jPOWD Structure files for Krennerite
[1]

Physical Properties of Krennerite

Cleavage:

[???] Perfect

Color:

White, Blackish yellow.

Density:

8.53

Diaphaniety:

Opaque

Fracture:

Conchoidal - Uneven - Uneven fracture producing small, conchoidal fragments.

Habit:

Striated - Parallel lines on crystal surface or cleavage face.

Hardness:

2.5 - Finger Nail

Luminescence:

Non-fluorescent.

Luster:

Metallic

Streak:

greenish gray

Optical Properties of Krennerite

RL Anisotrophism:

Strong, to dark brown.

RL Color:

Creamy white.

RL Pleochroism:

Weak.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Krennerite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
400 nm	47.40	52.30
420 nm	50.20	54.70
440 nm	53.00	57.10
460 nm	55.50	59.00
480 nm	57.50	60.40
500 nm	58.80	61.30
520 nm	59.80	62.00
540 nm	60.40	62.40
560 nm	60.90	62.80
580 nm	61.10	63.00
600 nm	61.50	63.40
620 nm	62.00	63.90
640 nm	62.30	64.40
660 nm	62.60	64.80
680 nm	62.80	65.20
700 nm	62.80	65.50

**Calculated Relative Intensity Colors of Krennerite in Air**
Relative Intensity	0%	20%	40%	60%	80%	100%	120%	140%	160%	170%
R₁
R₂

Calculated Properties of Krennerite

Electron Density:

r_electron=7.47 gm/cc
note: r_Krennerite=9.23 gm/cc.

Fermion Index

Fermion Index = 0.04509
Boson Index = 0.95491

Photoelectric:

PE_Krennerite= 945.97 barns/electron
U=PE_Krennerite x r_electron=7,067.41 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Krennerite is Not Radioactive

Krennerite Classification

Dana Class:

2.12.13.1 (2)Sulfides - Including Selenides and Tellurides

(2.12)where Am Bn Xp, with (m+n):p=1:2

(2.12.13)Dana Group

2.12.13.1 Krennerite AuTe2 Pma2 mm2

2.12.13.2 Calaverite AuTe2 C 2/m 2/m

2.12.13.3 Sylvanite (Au,Ag)2Te4 P 2/c 2/m

2.12.13.4 Kostovite CuAuTe4 Pma2 mm2

Strunz Class:

II/D.16-30 II - Sulfides and sulphosalts

II/D - Sulfides with metal: sulfur, selenium and tellurium < 1:1, Tellurides with Copper, Silver, Gold

II/D.16 - Kostovite - Calaverite series

II/D.16-10 Kostovite CuAuTe4 Pma2 mm2

II/D.16-20 Sylvanite (Au,Ag)2Te4 P 2/c 2/m

II/D.16-30 Krennerite AuTe2 Pma2 mm2

II/D.16-40 Calaverite AuTe2 C 2/m 2/m

Other Krennerite Information

References:

NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)

Search for Krennerite using:

[ALTAVISTA] [AOL] [About.com] [All-The-Web] [HotBot] [Ixquick] [LookSmart] [MAMMA] [MSN.COM] [Netscape] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Krennerite :
AA Mineral Specimens
B and L Minerals
Dan Weinrich Fine Minerals
Dan Weinrich Auctions
e-Rocks Auctions
Excalibur Minerals
Exceptional Minerals
Fabre Minerals
Greenside Minerals
John Betts Fine Minerals
Masons Minerals
Minernet.it
Mineral News
Mineral of the Month Club
MineralsWeb Fine Minerals
Rockshop.cz Kalat Fine Minerals
T G Fine Minerals
Wrights Rock Shop

Translate Krennerite Mineral Data :

Ask about Krennerite 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 Krennerite Specimen Label here :

Krennerite

AuTe2
Dana No: 2.12.13.1 Strunz No: II/D.16-30
Locality:

Notes: