Maucherite Mineral Data

Maucherite Mineral Data +

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General Maucherite Information

Chemical Formula:

Ni11As8

Composition:

Molecular Weight = 1,244.96 gm

Nickel 51.86 % Ni

Arsenic 48.14 % As

______

100.00 %

Empirical Formula:

Ni₁₁As₈

Environment:

In hydrothermal veins with other nickel arsenides and sulfides.

IMA Status:

Valid Species (Pre-IMA) 1913

Locality:

Eisleben, Mansfeld Basin, Saxony-Anhalt, Germany. Link to MinDat.org Location Data.

Name Origin:

Named for William Maucher (1879-1930), mineral dealer of Munich, Germany.

Synonym:

ICSD 34853

PDF 18-875

Placodine

Temiskamite

Maucherite Image

Images:

Maucherite

Comments: Massive, fine-grained, dark maucherite with cream-colored barite.
Location: Eisleben, Mansfeld Basin, Saxony-Anhalt, Germany. Scale: Specimen size 8 cm.
© Thomas Witzke / Abraxas-Verlag

Images:

Maucherite

Comments: Reddish, semi-metallic aggregate of feathery maucherite crystals on matrix.
Location: Cobalt, Ontario, Canada. Scale: Picture size 2 mm.
© Reiner Mielke

Maucherite Crystallography

Axial Ratios:

a:c = 1:3.17414

Cell Dimensions:

a = 6.868, c = 21.8, Z = 4; V = 1,028.29 Den(Calc)= 8.04

Crystal System:

Tetragonal - TrapezohedralH-M Symbol (4 2 2) Space Group: P 4₁2₁2,P 4₃2₁2

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

By Intensity(I/I_o): 1.713(1), 2.01(1), 2.69(0.9),

Crystal Structure:

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drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
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Fleet M E , American Mineralogist , 58 (1973) p.203-210, The crystal structure of maucherite (Ni11As8)

Physical Properties of Maucherite

Cleavage:

None

Color:

Grayish copper red, Reddish silver white, Bronze yellow, Reddish white.

Density:

7.83

Diaphaniety:

Opaque

Fracture:

Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.

Habit:

Striated - Parallel lines on crystal surface or cleavage face.

Habit:

Tabular - Form dimensions are thin in one direction.

Hardness:

5 - Apatite

Luminescence:

None.

Luster:

Metallic

Magnetism:

Nonmagnetic

Streak:

blackish gray

Optical Properties of Maucherite

RL Anisotrophism:

Weak.

RL Color:

Pinkish gray.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Maucherite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
400 nm	45.60	48.00
420 nm	45.80	48.00
440 nm	46.00	48.00
460 nm	46.40	48.20
480 nm	46.80	48.60
500 nm	47.20	49.20
520 nm	47.80	49.90
540 nm	48.40	50.80
560 nm	49.30	51.50
580 nm	50.30	52.50
600 nm	51.40	53.50
620 nm	52.70	54.80
640 nm	53.80	56.00
660 nm	55.00	57.20
680 nm	56.00	58.30
700 nm	57.00	59.30

**Calculated Relative Intensity Colors of Maucherite in Air**
Relative Intensity	0%	20%	40%	60%	80%	100%	120%	140%	160%	180%	190%
R₁
R₂

Calculated Properties of Maucherite

Electron Density:

r_electron=7.39 gm/cc
note: r_Maucherite=8.04 gm/cc.

Fermion Index

Fermion Index = 0.00585
Boson Index = 0.99415

Photoelectric:

PE_Maucherite= 55.61 barns/electron
U=PE_Maucherite x r_electron= 410.85 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Maucherite is Not Radioactive

Maucherite Classification

Dana Class:

2.16.16.1 (2)Sulfides - Including Selenides and Tellurides

(2.16)with miscellaneous formulae

(2.16.16)Dana Group

2.16.16.1 Maucherite Ni11As8 P 4₁2₁2,P 4₃2₁2 4 2 2

Strunz Class:

II/A.04-30 II - Sulfides and sulphosalts

II/A - Alloys and alloylike compounds, with Copper, Silver, Gold and Nickel

II/A.04 - Dienerite - Maucherite series

II/A.04-10 Dienerite Ni3As I 43d 4 3m

II/A.04-20 Orcelite Ni5-xAs2(x=0.23) P 6₃cm 6mm

II/A.04-30 Maucherite Ni11As8 P 4₁2₁2,P 4₃2₁2 4 2 2

Other Maucherite Information

References:

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

See Also:

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

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

Maucherite

Ni11As8
Dana No: 2.16.16.1 Strunz No: II/A.04-30
Locality:

Notes: