Pizgrischite Mineral Data

General Pizgrischite Information

Chemical Formula:

(Cu,Fe)Cu14PbBi17S35

Composition:

Molecular Weight = 5,853.00 gm

Iron 0.76 % Fe

Copper 16.55 % Cu

Bismuth 60.95 % Bi

Antimony 0.35 % Sb

Lead 2.12 % Pb

Selenium 0.04 % Se

Sulfur 19.22 % S

______

100.00 %

Empirical Formula:

Cu_15.24Fe²⁺_0.8Pb_0.6Bi_17.07Sb_0.17S_35.09Se_0.03

Environment:

Formed as the result of the Alpine metamorphism under greenschist-facies conditions of pre-Tertiary hydrothermal Cu-Bi mineralization. Related to cuprobismutite.

IMA Status:

Approved IMA 2001 (Dana # Added)

Locality:

Piz Grisch Mountain, Val Ferrera, Graubï¿½nden, Switzerland. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Synonym:

IMA2001-002

Pizgrischite Image

Images:

Pizgrischite

Comments: Pizgrischite crystals spray partially altered into malachite (green) and bismutite (yellow) in a fine-grained quartz matrix. (CanMin, v45:1229).
Location: Piz Grisch Mountain, Val Ferrera, GraubÃ¼nden, Switzerland. Scale: Picture size 4 cm.
© Canadian Mineralogist

Images:

Pizgrischite

Comments: SEM images of twinned pizgrischite crystals extracted from quartz matrix by treatment with dilute hydrofluoric acid. (CanMin, v45:1229).
Location: Piz Grisch Mountain, Val Ferrera, GraubÃ¼nden, Switzerland. Scale: See Image.
© S. Ansermet/Canadian Mineralogist

Pizgrischite Crystallography

Axial Ratios:

a:b:c =8.9623:1:11.043

Cell Dimensions:

a = 35.054, b = 3.91123, c = 43.192, Z = 4; beta = 96.713° V = 5,881.21 Den(Calc)= 6.61

Crystal System:

Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/m

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

By Intensity(I/I_o): 1.956(1), 3.104(0.68), 2.759(0.53),4.08(0.5), 2.752(0.44), 3.12(0.4), 5.364(0.4),

Physical Properties of Pizgrischite

Cleavage:

{001} Perfect, {010} Very Good

Color:

Lead gray.

Diaphaneity:

Opaque

Fracture:

Brittle - Uneven - Very brittle fracture producing uneven fragments.

Habit:

Acicular - Occurs as needle-like crystals.

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Habit:

Striated - Parallel lines on crystal surface or cleavage face.

Hardness:

3.5 - Copper Penny

Luster:

Metallic

Streak:

grayish black

Optical Properties of Pizgrischite

RL Anisotrophism:

Weak in dark brown.

RL Bireflectance:

Not apparent.

RL Color:

Dark brown in oil.

RL Pleochroism:

Not apparent.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Pizgrischite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
400 nm	39.90	40.90
420 nm	40.20	41.20
440 nm	40.40	41.50
460 nm	40.60	42.00
470 nm	40.70	42.10
480 nm	40.80	42.40
500 nm	41.00	42.70
520 nm	41.10	42.90
540 nm	41.10	43.00
546 nm	41.20	43.10
560 nm	41.10	43.10
580 nm	41.10	43.10
589 nm	41.20	43.30
600 nm	41.10	43.20
620 nm	41.10	43.40
640 nm	40.90	43.40
650 nm	40.70	43.30
660 nm	40.50	43.20
680 nm	40.30	43.10
700 nm	40.10	43.00

**Standardized Intensity (100%) Reflection Spectra of Pizgrischite in Oil**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
400 nm	24.80	25.80
420 nm	25.00	26.00
440 nm	25.05	26.20
460 nm	25.20	26.50
470 nm	25.30	26.75
480 nm	25.35	27.00
500 nm	25.40	27.15
520 nm	25.40	27.25
540 nm	25.45	27.40
546 nm	25.40	27.40
560 nm	25.40	27.45
580 nm	25.30	27.45
589 nm	25.40	27.50
600 nm	25.30	27.55
620 nm	25.25	27.55
640 nm	25.05	27.60
650 nm	25.00	27.55
660 nm	24.85	27.50
680 nm	24.70	27.30
700 nm	24.60	27.15

**Calculated Relative Intensity Colors of Pizgrischite in Air**
Relative Intensity	0%	30%	60%	90%	100%	120%	150%	180%	210%	220%
R₁
R₂

**Calculated Relative Intensity Colors of Pizgrischite in Oil**
Relative Intensity	0%	40%	80%	100%	120%	160%	200%	240%	280%	320%	350%
R₁
R₂

Calculated Properties of Pizgrischite

Electron Density:

Bulk Density (Electron Density)=5.65 gm/cc
note: Specific Gravity of Pizgrischite =6.61 gm/cc.

Fermion Index:

Fermion Index = 0.006329143
Boson Index = 0.993670857

Photoelectric:

PE_Pizgrischite=1,197.20 barns/electron
U=PE_Pizgrischite x rElectron Density=6,759.94 barns/cc.

Radioactivity:

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

Pizgrischite Classification

Dana Class:

03.06.21.01 (03)Sulfides - Sulfosalts

(03.06)where 2 < z/y < 2.49 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals

(03.06.21)Dana Group

03.06.21.01 Pizgrischite! (Cu,Fe)Cu14PbBi17S35 C 2/m 2/m

03.06.21.02 Rouxelite! Cu2HgPb22Sb28S64(O,S)2 C 2/m 2/m

Strunz Class:

02.JA.10d 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf

02.J - Sulfosalts of PbS Archetype

02.JA -Galena derivatives with little or no Pb

02.JA.10d Pizgrischite! (Cu,Fe)Cu14PbBi17S35 C 2/m 2/m

Other Pizgrischite Information

References:

NAME( CanMin, v45:1229) PHYS. PROP.(CanMin, v45:1229) OPTIC PROP.(CanMin, v45:1229)

See Also:

Links to other databases for Pizgrischite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Pizgrischite

(Cu,Fe)Cu14PbBi17S35
Dana No: 03.06.21.01 Strunz No: 02.JA.10d
Locality:

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