Berryite Mineral Data

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General Berryite Information

Chemical Formula:

Cu3Ag2Pb3Bi7S16

Composition:

Molecular Weight = 3,015.01 gm

Copper 6.18 % Cu

Silver 6.87 % Ag

Bismuth 49.00 % Bi

Lead 20.89 % Pb

Sulfur 17.06 % S

______

100.00 %

Empirical Formula:

Cu_2.93Ag_1.92Pb_3.04Bi_7.07S_16.04

Environment:

In quartz veins with other sulfides and sulfosalts, and in siderite-rich cryolite.

IMA Status:

Approved IMA 1966

Locality:

From the Missouri mine, Park Co., and the Mike mine, San Juan Co., Colorado, USA. Link to MinDat.org Location Data.

Name Origin:

For Professor Leonard Gascoigne Berry (1914-1982), mineralogist, Queen's University, Toronto, Canada, who obtained the first X-ray powder pattern of the mineral.

Name Pronunciation:

Berryite

Synonym:

IMA1965-013

Berryite Image

Images:

Berryite Aikinite

Comments: Fine-grained, gray, metallic granular berryite with silvery, metallic, prismatic aikinite.
Location: Mike Mine, San Juan County, Colorado. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Berryite Crystallography

Axial Ratios:

a:b:c =3.1517:1:7.1765

Cell Dimensions:

a = 12.703, b = 4.0305, c = 28.925, Z = 2; beta = 102.484° V = 1,445.93 Den(Calc)= 6.92

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/m

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

By Intensity(I/I_o): 3.47(1), 2.89(0.8), 2.8(0.7),

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
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Help on Above

Topa D , Makovicky E , Putz H , Mumme W G , The Canadian Mineralogist , 44 (2006) p.465-480, The crystal structure of berryite, Cu3Ag2Pb3Bi7S16, Locality: Grube Clara, Black Forest, Germany, Note: y-coordinates corrected by author

Physical Properties of Berryite

Cleavage:

{???} Indistinct

Color:

Blue gray, Gray.

Density:

6.7

Diaphaneity:

Opaque

Hardness:

3.5 - Copper Penny

Luster:

Metallic

Optical Properties of Berryite

RL Anisotrophism:

Distinct to strong, from gray-white to red-brown.

RL Color:

Gray white.

RL Pleochroism:

Weak to distinct.

Calculated Properties of Berryite

Electron Density:

Bulk Density (Electron Density)=5.82 gm/cc
note: Specific Gravity of Berryite =6.92 gm/cc.

Fermion Index:

Fermion Index = 0.04
Boson Index = 0.96

Photoelectric:

PE_Berryite=1,341.69 barns/electron
U=PE_Berryite x rElectron Density=7,809.01 barns/cc.

Radioactivity:

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

Berryite Classification

Dana Class:

03.06.15.01 (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

(03.06.15)Dana Group

03.06.15.01 Berryite Cu3Ag2Pb3Bi7S16 P 2₁/m 2/m

Strunz Class:

02.HB.20d 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf

02.H - Sulfosalts of SnS Archetype

02.HB -With Cu, Ag, Hg, Fe, Sn and Pb

02.HB.20d Berryite Cu3Ag2Pb3Bi7S16 P 2₁/m 2/m

Other Berryite Information

References:

NAME( AntBidBlaNic1) PHYS. PROP.(Dana8, AmMin, v91, p1950) OPTIC PROP.(AntBidBlaNic1)

See Also:

Links to other databases for Berryite :
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

Search for Berryite using:

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Ask about Berryite 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 Berryite Specimen Label here :

Berryite

Cu3Ag2Pb3Bi7S16
Dana No: 03.06.15.01 Strunz No: 02.HB.20d
Locality:

Notes: