Elyite Mineral Data

General Elyite Information

Chemical Formula:

Pb4Cu(SO4)O2(OH)4•(H2O)

Composition:

Molecular Weight = 1,106.45 gm

Copper 5.74 % Cu 7.19 % CuO

Hydrogen 0.55 % H 4.88 % H₂O

Lead 74.91 % Pb 80.69 % PbO

Sulfur 2.90 % S 7.24 % SO₃

Oxygen 15.91 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Pb₄Cu(SO₄)O₂(OH)₄•(H₂O)

Environment:

In vugs in oxidizing Pb-Cu-Zn sulfide ores. Common as a smelter product in slags.

IMA Status:

Approved IMA 1972

Locality:

Silver King mine, Ward, Nevada, USA. Link to MinDat.org Location Data.

Name Origin:

Named for John Ely, an important figure in the early mining history of eastern Nevada.

Name Pronunciation:

Elyite

Synonym:

ICSD 89798

PDF 50-1613

Elyite Image

Images:

Elyite

Comments: Purple acicular crystals of elyite.
Location: Kurfurst-Ernst, Bonkhausen, Sauerland, Nordrhein-Westfalen, Germany. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Elyite Crystallography

Axial Ratios:

a:b:c =1.2342:1:1.2669

Cell Dimensions:

a = 14.233, b = 11.532, c = 14.611, Z = 8; beta = 100.45° V = 2,358.40 Den(Calc)= 6.23

Crystal System:

Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 2₁/c

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

By Intensity(I/I_o): 6.999(1), 7.189(0.99), 2.995(0.73),

Physical Properties of Elyite

Cleavage:

{100} Good

Color:

Violet, Lavender.

Density:

Diaphaneity:

Transparent

Fracture:

Sectile - Curved shavings or scrapings produced by a knife blade, (e.g. graphite).

Habit:

Granular - Generally occurs as anhedral to subhedral crystals in matrix.

Hardness:

2 - Gypsum

Luster:

Silky

Streak:

white

Optical Properties of Elyite

Gladstone-Dale:

CI meas= -0.11 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.069 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1593,KPDmeas= 0.1654,KC= 0.149
Ncalc = 1.89 - 1.93

Optical Data:

Biaxial (-), a=1.99, b=1.993, g=1.994, bire=0.0040, 2V(Calc)=58, 2V(Meas)=66.

Calculated Properties of Elyite

Electron Density:

Bulk Density (Electron Density)=5.26 gm/cc
note: Specific Gravity of Elyite =6.23 gm/cc.

Fermion Index:

Fermion Index = 0.16
Boson Index = 0.84

Photoelectric:

PE_Elyite=1,365.28 barns/electron
U=PE_Elyite x rElectron Density=7,179.99 barns/cc.

Radioactivity:

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

Elyite Classification

Dana Class:

30.01.02.01 (30)Anhydrous Sulfates Containing Hydroxyl or Halogen

(30.01)where (A B)m (XO4)p Zq where m:p>2:1

(30.01.02)Dana Group

30.01.02.01 Elyite Pb4Cu(SO4)O2(OH)4•(H2O) P 2₁/c 2/m

Strunz Class:

07.DF.65 07 - SULFATES (SELENATES, TELLURATES)

07.D - Sulfates (selenates, etc.) with additional anions, with H2O

07.DF -With large and medium-sized cations

07.DF.65 Elyite Pb4Cu(SO4)O2(OH)4•(H2O) P 2₁/c 2/m

Other Elyite Information

References:

NAME( Dana8) PHYS. PROP.(AmMin, Vol 85, p 1816) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Elyite :
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
15 - WWW-MINCRYST

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Elyite

Pb4Cu(SO4)O2(OH)4•(H2O)
Dana No: 30.01.02.01 Strunz No: 07.DF.65
Locality:

Notes:

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