Nuffieldite Mineral Data

Nuffieldite Mineral Data +

[Thumbnails] [Miniatures] [Cabinets] [About Us] [FAQ]
Welcome To Mason's Minerals
Your Source for Beautiful Minerals and Crystals
We offer a no-questioned-asked Satisfaction Guarantee

General Nuffieldite Information

Chemical Formula:

Pb2Cu(Pb,Bi)Bi2S7

Composition:

Molecular Weight = 1,328.46 gm

Copper 4.78 % Cu

Bismuth 39.33 % Bi

Lead 38.99 % Pb

Sulfur 16.90 % S

______

100.00 %

Empirical Formula:

Pb_2.5CuBi_2.5S₇

Environment:

Found in vugs in a small quartz vein in the Lime Creek stock.

IMA Status:

Approved IMA 1968

Locality:

Lime Creek stock, Alice Arm, BC, Canada. Link to MinDat.org Location Data.

Name Origin:

Named for Edward W. Nuffield (1914-), Canadian mineralogist.

Synonym:

ICSD 84625

IMA1967-003

PDF 19-675

Search for Nuffieldite Images

Images:

Image not yet available on Webmineral.com

Try searching images.google.com or Mindat Picture Gallary for mineral pictures. Caution: The images retrieved may not be appropriate.

Nuffieldite Crystallography

Axial Ratios:

a:b:c =0.6833:1:0.1884

Cell Dimensions:

a = 14.61, b = 21.38, c = 4.03, Z = 4; V = 1,258.82 Den(Calc)= 7.01

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pbnm

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

By Intensity(I/I_o): 3.54(1), 3.66(1), 4(0.9),

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

Moelo Y , Meerschaut A , Makovicky E , The Canadian Mineralogist , 35 (1997) p.1497-1508, Refinement of the crystal structure of nuffieldite, Pb2Cu1.4(Pb.4Bi.4Sb.2)Bi2S7:, Structural relationships and genesis of complex lead sulfosalt structures

Physical Properties of Nuffieldite

Cleavage:

[001] Perfect

Color:

Gray, Steel gray, Grayish green, Reddish brown.

Density:

7.01

Diaphaniety:

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).

Hardness:

3.5-4 - Copper Penny-Fluorite

Luster:

Metallic

Streak:

grayish black

Optical Properties of Nuffieldite

RL Anisotrophism:

Very weak, from bluish gray to grayish red.

RL Color:

Pale creamy white.

Calculated Properties of Nuffieldite

Electron Density:

r_electron=5.84 gm/cc
note: r_Nuffieldite=7.01 gm/cc.

Fermion Index

Fermion Index = 0.08744
Boson Index = 0.91256

Photoelectric:

PE_Nuffieldite=1,481.29 barns/electron
U=PE_Nuffieldite x r_electron=8,652.83 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Nuffieldite is Not Radioactive

Nuffieldite Classification

Dana Class:

3.3.4.1 (3)Sulfides - Sulfosalts

(3.3)where 3 < z/y < 4 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals

(3.3.4)Dana Group

3.3.4.1 Nuffieldite Pb2Cu(Pb,Bi)Bi2S7 Pbnm 2/m 2/m 2/m

3.3.4.2 Tsugaruite! Pb4As2S7 Pba2 or Pbam Ortho

Strunz Class:

II/E.33-40 II - Sulfides and sulphosalts

II/E - Sulfosalts (S : As,Sb,Bi = x) Lead-Sulfosalts (Pb-Cu/Ag) with predominant Vismut x = 6.0 - 1.6

II/E.33 - Izoklakeite - Berryite series

II/E.33-05 Izoklakeite Pb27(Cu,Fe)2(Sb,Bi)19S57 Pnnm 2/m 2/m 2/m

II/E.33-10 Giessenite Pb13(Cu,Ag)(Bi,Sb)9S28(?) P 2₁/n 2/m

II/E.33-15 Tintinaite Pb22Cu4(Sb,Bi)30S69 Pnnm 2/m 2/m 2/m

II/E.33-20 Kobellite Pb22Cu4(Bi,Sb)30S69 Pnmm 2/m 2/m 2/m

II/E.33-30 Eclarite Pb9(Cu,Fe)Bi12S28 P nma 2/m 2/m 2/m

II/E.33-40 Nuffieldite Pb2Cu(Pb,Bi)Bi2S7 Pbnm 2/m 2/m 2/m

II/E.33-50 Berryite Pb3(Ag,Cu)5Bi7S16 P 2₁/m 2/m

Other Nuffieldite Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)

See Also:

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

Search for Nuffieldite using:

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

Visit our Advertisers for Nuffieldite :
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 Nuffieldite Mineral Data :

Ask about Nuffieldite 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 Nuffieldite Specimen Label here :

Nuffieldite

Pb2Cu(Pb,Bi)Bi2S7
Dana No: 3.3.4.1 Strunz No: II/E.33-40
Locality:

Notes: