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Cassedanneite

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Big Photo

Lady Anne Hopetoun shaft (Brow and Hopeful Veins), Wanlock Dod, Leadhills, South Lanarkshire, Strathclyde (Lanarkshire), Scotland, UK
© Steve Rust

Show Cassedanneite Photos (7)



Formula:
Pb
 
5
(CrO
 
4
)
 
2
(VO
 
4
)
 
2
 · H
 
2
O
System:MonoclinicColour:Orange-red
Lustre:ResinousHardness:3½
Name:For J. P. Cassedanne of the University of Rio de Janeiro.
This page provides mineralogical data about Cassedanneite.

Classification of Cassedanneite

IMA status:Approved 1984
Strunz 8th edition ID:6/F.04-20
Nickel-Strunz 10th (pending) edition ID:7.FC.20

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
F : Chromates
C : With PO4, AsO4, SiO4
Dana 8th edition ID:43.3.2.2

43 : COMPOUND PHOSPHATES, ETC.
3 : Hydrated Normal Compound Phosphates, etc·
Hey's CIM Ref.:22.5.3

22 : Phosphates, Arsenates or Vanadates with other Anions
5 : Phosphates, arsenates or vanadates with chromate, molybdate, niobate or tantalate
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Type Occurrence of Cassedanneite

Type Locality:Berezovskoe Au Deposit (Berezovsk Mines), Berezovskii (Berezovskii Zavod), Ekaterinburg (Sverdlovsk), Ekaterinburgskaya (Sverdlovskaya) Oblast', Middle Urals, Urals Region, Russia

Physical Properties of Cassedanneite

Lustre:Resinous
Colour:Orange-red
Hardness (Mohs):3½

Crystallography of Cassedanneite

Crystal System:Monoclinic
Cell Parameters:a = 7.69Å, b = 5.76Å, c = 9.79Å
β = 115.93°
Ratio:a:b:c = 1.335 : 1 : 1.7
Unit Cell Volume:V 389.99 ų (Calculated from Unit Cell)

Chemical Properties of Cassedanneite

Formula:
Pb
 
5
(CrO
 
4
)
 
2
(VO
 
4
)
 
2
 · H
 
2
O
Essential elements:Cr, H, O, Pb, V
All elements listed in formula:Cr, H, O, Pb, V
Common Impurities:Cu,Zn,P

Relationship of Cassedanneite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
7.FC.05Vauquelinite
Pb
 
2
Cu(CrO
 
4
)(PO
 
4
)(OH)
7.FC.10Fornacite
Pb
 
2
Cu(CrO
 
4
)(AsO
 
4
)(OH)
7.FC.10Molybdofornacite
Pb
 
2
Cu(MoO
 
4
,CrO
 
4
)(AsO
 
4
,PO
 
4
)(OH)
7.FC.15Hemihedrite
Pb
 
10
Zn(CrO
 
4
)
 
6
(SiO
 
4
)
 
2
(F,OH)
 
2
7.FC.15Iranite
Pb
 
10
Cu(CrO
 
4
)
 
6
(SiO
 
4
)
 
2
(F,OH)
 
2
7.FC.20Embreyite
Pb
 
5
(CrO
 
4
)
 
2
(PO
 
4
)
 
2
 · H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
22.5.1Vauquelinite
Pb
 
2
Cu(CrO
 
4
)(PO
 
4
)(OH)
22.5.2Embreyite
Pb
 
5
(CrO
 
4
)
 
2
(PO
 
4
)
 
2
 · H
 
2
O
22.5.4Fornacite
Pb
 
2
Cu(CrO
 
4
)(AsO
 
4
)(OH)
22.5.5Molybdofornacite
Pb
 
2
Cu(MoO
 
4
,CrO
 
4
)(AsO
 
4
,PO
 
4
)(OH)
22.5.6Mendozavilite
Na(Ca,Mg)
 
2
Fe
3+
6
(PMo
 
11
O
 
39
)(PO
 
4
)
 
2
(OH,Cl)
 
10
 · 33H
 
2
O
22.5.7Paramendozavilite
NaAl
 
4
Fe
3+
7
(PMo
 
12
O
 
40
)(PO
 
4
)
 
5
(OH)
 
16
 · 56H
 
2
O
22.5.8Betpakdalite
{Mg(H
 
2
O)
 
6
}Ca
 
2
(H
 
2
O)
 
13
[Mo
6+
8
As
5+
2
Fe
3+
3
O
 
36
(OH)](H
 
2
O)
 
4
22.5.9Natrobetpakdalite
(Na
 
2
,Ca)Fe
 
2
(As
 
2
Mo
 
6
O
 
28
) · 15H
 
2
O
22.5.10Obradovicite
H
 
4
(K,Na)CuFe
 
2
(MoO
 
4
)
 
5
(AsO
 
4
) · 12H
 
2
O
22.5.11Melkovite
CaFe
3+
2
Mo
 
5
(PO
 
4
)
 
2
O
 
10
(OH)
 
12
 · 8H
 
2
O
22.5.12Rankachite
Ca
 
0.5
(V
4+
 
,V
5+
 
)(W
6+
 
,Fe
3+
 
)
 
2
O
 
8
(OH) · 2H
 
2
O
22.5.13Olmsteadite
KFe
2+
2
(Nb
5+
 
,Ta
5+
 
)(PO
 
4
)
 
2
O
 
2
 · 2H
 
2
O
22.5.14Johnwalkite
K(Mn
2+
 
,Fe
2+
 
,Fe
3+
 
)
 
2
(Nb
5+
 
,Ta
5+
 
)(PO
 
4
)
 
2
O
 
2
 · 2(H
 
2
O,OH)

Other Names for Cassedanneite

Synonyms:
IMA1984-063
Other Languages:
German:Cassedanneit
Spanish:Cassedanneita

Other Information

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 Cassedanneite

Reference List:

- +
American Mineralogist: 73: 1493.

Cesbron et al (1988) Le cassedanneite, nouveau chromo-vanadate de plomb de Beresovsk (Oural). Comptes Rendus de l'Academie des Sciences, Paris, Series II 306(2), 125-127.

Internet Links for Cassedanneite

Search Engines:
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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
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    • Localities for Cassedanneite

    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
    Hide Locality List
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Russia
     
    • Urals Region
      • Middle Urals
        • Ekaterinburgskaya (Sverdlovskaya) Oblast'
          • Ekaterinburg (Sverdlovsk)
            • Berezovskii (Berezovskii Zavod)
    		Am Min 73:11-12 p 1493
    UK
     
    • Scotland
      • Strathclyde (Lanarkshire)
        • South Lanarkshire
          • Leadhills
            • Mine Hill
    		S.Rust collection
            • Wanlock Dod
    		UKJMM 26:29-30
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