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Orlandiite

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Baccu Locci Mine, Villaputzu, Cagliari Province, Sardinia, Italy
© Thomas Witzke

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Formula:
Pb
 
10
(SeO
 
4
)O
 
7
Cl
 
4
 · H
 
2
O
System:TriclinicColour:Colourless to white
Lustre:
Name:For Italian mineralogist, Paolo Orlandi (b.1946).
This page provides mineralogical data about Orlandiite.

Classification of Orlandiite

IMA status:Approved 1998
Strunz 8th edition ID:4/K.01-30
Nickel-Strunz 10th (pending) edition ID:4.JH.20

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
J : Arsenites, antimonites, bismuthites, sulfites, selenites, tellurites; iodates
H : Selenites without additional anions, with H2O
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Type Occurrence of Orlandiite

Type Locality:Baccu Locci Mine, Villaputzu, Cagliari Province, Sardinia, Italy

Physical Properties of Orlandiite

Colour:Colourless to white
Streak:White

Crystallography of Orlandiite

Crystal System:Triclinic

Optical Data of Orlandiite

Type:Biaxial
Dispersion:strong

Chemical Properties of Orlandiite

Formula:
Pb
 
10
(SeO
 
4
)O
 
7
Cl
 
4
 · H
 
2
O
Essential elements:Cl, H, O, Pb, S
All elements listed in formula:Cl, H, O, Pb, Se

Relationship of Orlandiite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
4.JH.05Chalcomenite
CuSeO
 
3
 · 2H
 
2
O
4.JH.10Ahlfeldite
(Ni,Co)SeO
 
3
 · 2H
 
2
O
4.JH.10Clinochalcomenite
CuSeO
 
3
 · 2H
 
2
O
4.JH.10Cobaltomenite
CoSeO
 
3
 · 2H
 
2
O
4.JH.15Mandarinoite
Fe
3+
2
(SeO
 
3
)
 
3
 · 4H
 
2
O
4.JH.20UM1999-29-SeO:ClCuHPb
Pb
 
4
Cu(SeO
 
3
)
 
3
(OH)Cl
 
3
4.JH.25Larisaite
Na(H
 
3
O)(UO
 
2
)
 
3
(SeO
 
3
)O
 
2
 · 4H
 
2
O

Other Names for Orlandiite

Synonyms:
IMA1998-035IMA1998-038
Other Languages:
German:Orlandiit
Russian:Орландит
Spanish:Orlandiita

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 Orlandiite

Reference List:

- +
Campostrini, I., Gramaccioli, C. M. and Demartin, F. (1999): Orlandiite, Pb3Cl4(SeO3)3•H2O, a new mineral species, and an associated lead-copper selenite chloride from the Baccu Locci mine, Sardinia, Italy, Canadian Mineralogist: 37: 1493-98.

Internet Links for Orlandiite

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    • Localities for Orlandiite

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    (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.
    Italy
     
    • Sardinia
      • Cagliari Province
        • Villaputzu
    		Campostrini, I., Gramaccioli, C. M. and Demartin, F. (1999): Orlandiite, Pb3Cl4(SeO3)3•H2O, a new mineral species, and an associated lead-copper selenite chloride from the Baccu Locci mine, Sardinia, Italy. Can. Mineral. 37, 1493-1498; [AmMin 85:1563]; Campostrini, I. & Gramaccioli, C. M. (2001): Selenium-rich secondary minerals from the Baccu Locci mine (Sardinia, Italy). Neues Jahrbuch fuer Mineralogie, Abhandlungen 177, 37-59.
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