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Elyite

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Llechwedd Helyg Mine (Willow Bank Mine), Pen-bont Rhydybeddau, Trefeirig, Ceredigion (Dyfed; Cardiganshire), Wales, UK
© Steve Rust

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Formula:
Pb
 
4
Cu(SO
 
4
)O
 
2
(OH)
 
4
·H
 
2
O
System:MonoclinicColour:Purple
Hardness:2
Name:Named for John Ely, an important figure in early mining history of eastern Nevada.
This page provides mineralogical data about Elyite.

Classification of Elyite

IMA status:Approved 1971
Strunz 8th edition ID:6/B.10-40
Nickel-Strunz 10th (pending) edition ID:7.DF.65

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
D : Sulfates (selenates, etc.) with additional anions, with H2O
F : With large and medium-sized cations
Dana 7th edition ID:30.1.2.1
Dana 8th edition ID:30.1.2.1

30 : ANHYDROUS SULFATES CONTAINING HYDROXYL OR HALOGEN
1 : (AB)m(XO4)pZq, where m:p>2:1
Hey's CIM Ref.:25.7.7

25 : Sulphates
7 : Sulphates of Pb
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Type Occurrence of Elyite

Type Locality:Caroline tunnel, Ward mine (Silver King mine), Ward District, White Pine Co., Nevada, USA
General Appearance of Type Material:Light violet prismatic crystals.
Place of Conservation of Type Material:British Museum Natural History.
Year of Discovery:1972
Geological Setting of type material:Voids in oxidizing Lead-Copper-Zinc sulfide ores.

Occurrences of Elyite

Geological Setting:Slag product.

Physical Properties of Elyite

Lustre:Silky
Diaphaneity (Transparency):Transparent
Colour:Purple
Streak:pale violet to white
Hardness (Mohs):2
Tenacity:Sectile
Cleavage:Distinct/Good
(001)
Density (measured):6 g/cm3

Crystallography of Elyite

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Cell Parameters:a = 14.233Å, b = 11.532Å, c = 14.611Å
β = 100.45°
Ratio:a:b:c = 1.234 : 1 : 1.267
Unit Cell Volume:V 2358.4 ų
Z:8
Twinning:Mirror twinning on (100)

Optical Data of Elyite

Type:Biaxial (-)
RI values: nα = 1.990 nβ = 1.993 nγ = 1.994
2V:Measured: 66° , Calculated: 58°
Maximum Birefringence:δ = 0.004

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Very High
Dispersion:r > v

Chemical Properties of Elyite

Formula:
Pb
 
4
Cu(SO
 
4
)O
 
2
(OH)
 
4
·H
 
2
O
Essential elements:Cu, H, O, Pb, S
All elements listed in formula:Cu, H, O, Pb, S

Relationship of Elyite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
7.DF.05Uklonskovite
NaMg[F|SO
 
4
] · 2H
 
2
O
7.DF.10Kainite
KMg[Cl|SO
 
4
] · 3H
 
2
O
7.DF.15Natrochalcite
NaCu
 
2
[OH|(SO
 
4
)
 
2
] · 2H
 
2
O
7.DF.20Metasideronatrite
Na
 
4
Fe
 
2
(SO
 
4
)
 
4
(OH)
 
2
·2H
 
2
O
7.DF.20Sideronatrite
Na
 
2
Fe(SO
 
4
)
 
2
OH·3H
 
2
O
7.DF.25Despujolsite
Ca
 
3
Mn
4+
 
[(OH)
 
6
|(SO
 
4
)
 
2
] · 3H
 
2
O
7.DF.25Fleischerite
Pb
 
3
Ge[(OH)
 
6
|(SO
 
4
)
 
2
] · 3H
 
2
O
7.DF.25Schaurteite
Ca
 
3
Ge[(OH)
 
6
|(SO
 
4
)
 
2
] · 4H
 
2
O
7.DF.25Mallestigite
Pb
 
3
Sb
5+
 
[(OH)
 
6
|AsO
 
4
|SO
 
4
] · 3H
 
2
O
7.DF.30Slavíkite
(H
 
3
O
+
 
)
 
3
Mg
 
6
Fe
 
15
(SO
 
4
)
 
21
(OH)
 
18
·99H
 
2
O
7.DF.35Metavoltine
Na
 
6
K
 
2
FeFe
 
6
(SO
 
4
)
 
12
O
 
2
·18H
 
2
O
7.DF.40Lannonite
HCa
 
4
Mg
 
2
Al
 
4
(SO
 
4
)
 
8
F
 
9
·32H
 
2
O
7.DF.40Vlodavetsite
AlCa
 
2
[F
 
2
|Cl|(SO
 
4
)
 
2
] · 4H
 
2
O
7.DF.45Peretaite
Ca(SbO)
 
4
[(OH)|SO
 
4
]
 
2
 · 2H
 
2
O
7.DF.50Gordaite
NaZn
 
4
[(OH)
 
6
|SO
 
4
|Cl] · 6H
 
2
O
7.DF.55Clairite
(NH
 
4
)
 
2
Fe
 
3
(SO
 
4
)
 
4
(OH)
 
3
·3H
 
2
O
7.DF.60Arzrunite
near Cu
 
4
Pb
 
2
SO
 
4
Cl
 
6
(OH)
 
4
·2H
 
2
O
7.DF.70Yecoraite
Fe
3+
3
(BiO)
 
5
(Te
4+
 
O
 
3
)(Te
6+
 
O
 
6
)
 
2
 · 9H
 
2
O
7.DF.75Riomarinaite
Bi(OH)(SO
 
4
) * H
 
2
O
7.DF.80Dukeite
Bi
 
24
Cr
6+
8
O
 
57
(OH)
 
6
(H
 
2
O)
 
3
7.DF.85Xocolatlite
Ca
 
2
Mn
4+
2
Te
6+
2
O
 
12
·H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
25.7.1Schaurteite
Ca
 
3
Ge[(OH)
 
6
|(SO
 
4
)
 
2
] · 4H
 
2
O
25.7.2Zircosulfate
(Zr,Ti)(SO
 
4
)
 
2
·4H
 
2
O
25.7.3Anglesite
PbSO
 
4
25.7.4Lanarkite
Pb
 
2
[O|SO
 
4
]
25.7.5Palmierite
(K,Na)
 
2
Pb(SO
 
4
)
 
2
25.7.6Linarite
PbCu[(OH)
 
2
|SO
 
4
]
25.7.8Chenite
Pb
 
4
Cu[(OH)
 
3
|SO
 
4
]
 
2
25.7.9Osarizawaite
Pb(Al,Cu)
 
3
[(OH,H
 
2
O)
 
3
|SO
 
4
]
 
2
25.7.10Itoite
Pb
 
3
Ge
4+
 
[O|OH|SO
 
4
]
 
2
25.7.11Fleischerite
Pb
 
3
Ge[(OH)
 
6
|(SO
 
4
)
 
2
] · 3H
 
2
O
25.7.12Beaverite
Pb(Fe
3+
 
,Cu,Al)
 
3
[(OH)
 
3
|SO
 
4
]
 
2
25.7.13Plumbojarosite
PbFe
3+
6
[(OH)
 
3
|SO
 
4
]
 
4

Other Names for Elyite

Synonyms:
IMA1971-043
Other Languages:
German:Elyit
Russian:Элиит
Spanish:Elyita

Other Information

Fluorescence in UV light:None
Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Elyite

Reference List:American Mineralogist: 57: 364-367.

Williams, S. A. (1972): Elyite, basic lead-copper sulfate, a new mineral from Nevada. Am. Mineral. 57, 364-367.

U. Kolitsch and G. Giester (2000): Elyite, Pb4Cu(SO4)O2(OH)4•H2O: crystal structure and new data. American Mineralogist 85, 1816-1821.

Internet Links for Elyite

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    Localities for Elyite

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