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Barstowite

Big Photo

Passa Limani Cove slag locality, Passa Limani area, Lavrion District slag localities, Lavrion (Laurion; Laurium) District, Attikí (Attica; Attika) Prefecture, Greece
© Christian Rewitzer

Formula:
Pb
 
4
[Cl
 
6
|CO
 
3
] · H
 
2
O
System:MonoclinicColour:Transparent to white
Lustre:AdamantineHardness:3
Name:Named after Richard W. Barstow (1947-1982), cornish mineral collector and dealer
This page provides mineralogical data about Barstowite.

Classification of Barstowite

IMA status:Approved 1989
Strunz 8th edition ID:5/E.08-100
Nickel-Strunz 10th (pending) edition ID:3.DC.95

3 : HALIDES
D : Oxyhalides, hydroxyhalides and related double halides
C : With Pb (As,Sb,Bi), without Cu
Dana 8th edition ID:12.1.7.1

12 : COMPOUND HALIDES
1 : Miscellaneous
Hey's CIM Ref.:12.1.24

12 : Carbonates with other anions
1 : Carbonates with halides
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Type Occurrence of Barstowite

Type Locality:Bounds Cliff, St Endellion, Area East of Wadebridge, Wadebridge District, Cornwall, England, UK

Physical Properties of Barstowite

Lustre:Adamantine
Colour:Transparent to white
Streak:White
Hardness (Mohs):3

Crystallography of Barstowite

Crystal System:Monoclinic
Cell Parameters:a = 4.21Å, b = 9.18Å, c = 16.67Å
β = 91.49°
Ratio:a:b:c = 0.459 : 1 : 1.816
Unit Cell Volume:V 644.04 ų (Calculated from Unit Cell)

Chemical Properties of Barstowite

Formula:
Pb
 
4
[Cl
 
6
|CO
 
3
] · H
 
2
O
Essential elements:C, Cl, H, O, Pb
All elements listed in formula:C, Cl, H, O, Pb

Relationship of Barstowite to other Species

Related Minerals - Nickel-Strunz Grouping):
3.DC.05Laurionite
PbClOH
3.DC.05Paralaurionite
PbClOH
3.DC.10Fiedlerite
Pb
 
3
Cl
 
4
F(OH)·H
 
2
O
3.DC.15Penfieldite
Pb
 
2
[OH|Cl
 
3
]
3.DC.20Laurelite
Pb(F,Cl,OH)
 
2
3.DC.25Bismoclite
BiOCl
3.DC.25Daubréeite
BiO(OH,Cl)
3.DC.25Matlockite
PbFCl
3.DC.25Rorisite
CaFCl
3.DC.25Zavaritskite
BiOF
3.DC.25Zhangpeishanite
BaFCl
3.DC.30Nadorite
PbSb[O
 
2
|Cl]
3.DC.30Perite
PbBi[O
 
2
|Cl]
3.DC.35Aravaipaite
Pb
 
3
[F
 
3
|AlF
 
6
] · H
 
2
O
3.DC.35Calcioaravaipaite
PbCa
 
2
[(F,OH)
 
3
|AlF
 
6
] · H
 
2
O
3.DC.40Thorikosite
Pb
 
3
[OH|(SbO
 
3
,AsO
 
3
)|Cl
 
2
]
3.DC.45Mereheadite
Pb
 
2
[O|OH|Cl]
3.DC.50Blixite
Pb
 
2
[(O,OH)
 
2
|Cl]
3.DC.55Pinalite
Pb
 
3
WO
 
3
Cl
 
2
3.DC.60Symesite
Pb
 
10
[O
 
7
|SO
 
4
|Cl
 
4
] · H
 
2
O
3.DC.65Ecdemite
Pb
 
6
[As
 
2
O
 
7
|Cl
 
4
]
3.DC.65Heliophyllite
Pb
 
3
AsO
 
4-n
Cl
 
2n+1
3.DC.70Mendipite
Pb
 
3
[O
 
2
|Cl
 
2
]
3.DC.75Damaraite
Pb
 
3
[O
 
2
|OH|Cl]
3.DC.80Onoratoite
Sb
 
8
O
 
11
Cl
 
2
3.DC.85Cotunnite
PbCl
 
2
3.DC.90Pseudocotunnite
K
 
2
PbCl
 
4
Related Minerals - Hey's Index Grouping:
12.1.1Northupite
Na
 
3
Mg(CO
 
3
)
 
2
Cl
12.1.2Barentsite
Na
 
7
AlH
 
2
(CO
 
3
)
 
4
F
 
4
12.1.3Rouvilleite
Na
 
3
(Ca,Mn,Fe)
 
2
(CO
 
3
)
 
3
F
12.1.4Chlormagaluminite
(Mg,Fe
2+
 
)
 
4
Al
 
2
[(OH)
 
12
|(Cl
 
2
,CO
 
3
)] · 2H
 
2
O
12.1.5Defernite
Ca
 
6
(CO
 
3
)
 
2-x
(SiO
 
4
)
 
x
(OH)
 
7
(Cl,OH)
 
1-2x
 (x=0.5)
12.1.6Brenkite
Ca
 
2
[F
 
2
|CO
 
3
]
12.1.7Stenonite
(Sr,Ba,Na)
 
2
AlCO
 
3
F
 
5
12.1.8Bastnäsite-(Ce)
(Ce,La)[F|CO
 
3
]
12.1.9Bastnäsite-(La)
(La,Ce)[F|CO
 
3
]
12.1.10Bastnäsite-(Y)
(Y,Ce)[F|CO
 
3
]
12.1.11Parisite-(Ce)
Ca(Ce,La)
 
2
[F
 
2
|(CO
 
3
)
 
3
]
12.1.12Parisite-(Nd)
Ca(Nd,Ce,La)
 
2
[F
 
2
|(CO
 
3
)
 
3
]
12.1.13Synchysite-(Ce)
Ca(Ce,La)[F|(CO
 
3
)
 
2
]
12.1.14Synchysite-(Y)
Ca(Y,Ce)[F|(CO
 
3
)
 
2
]
12.1.15Synchysite-(Nd)
Ca(Nd,Y,Gd)[F|(CO
 
3
)
 
2
]
12.1.16Röntgenite-(Ce)
Ca
 
2
(Ce,La)
 
3
[F
 
3
|(CO
 
3
)
 
5
]
12.1.17Cordylite-(Ce)
(Na,Ca)BaCe
 
2
(CO
 
3
)
 
4
F
12.1.19Huanghoite-(Ce)
BaCe[F|(CO
 
3
)
 
2
]
12.1.20Zhonghuacerite-(Ce)
Ba
 
2
Ce[F|(CO
 
3
)
 
3
]
12.1.21Cebaite-(Ce)
Ba
 
3
Ce
 
2
[F
 
2
|(CO
 
3
)
 
5
]
12.1.22Thorbastnäsite
Th(Ca,Ce)(CO
 
3
)
 
2
F
 
2
·3H
 
2
O
12.1.23Phosgenite
Pb
 
2
[Cl
 
2
|CO
 
3
]
12.1.25Albrechtschraufite
Ca
 
4
Mg(UO
 
2
)
 
2
[F
 
2
|(CO
 
3
)
 
6
] · 17 H
 
2
O
12.1.26Kettnerite
(BiO)Ca[F|CO
 
3
]

Other Names for Barstowite

Synonyms:
IMA1989-057
German names:
Barstowit
Russian names:
Барстоуит
Spanish names:
Barstowita

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 Barstowite

Reference List:Mineralogical Magazine: 55: 121-125.

Internet Links for Barstowite

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  • Raman and XRD data at RRUFF project
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    Localities for Barstowite

    (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.
    Austria
     
    • Tyrol
      • North Tyrol
        • Inn valley
          • Brixlegg - Schwaz area
            • Brixlegg - Rattenberg
              • St Gertraudi
    		Lapis 19 (7/8):69 (1994)
    Greece
     
    • Attikí (Attica; Attika) Prefecture
      • Lavrion (Laurion; Laurium) District
        • Lavrion District slag localities
          • Passa Limani area
    		Gelaude, Piet, van Kalmthout, Piet, and Rewitzer, Christian (1996) Laurion: The Minerals of the Ancient Slags, Janssen Print, Nijmegen, The Netherlands
    Italy
     
    • Tuscany
      • Livorno Province
        • Piombino
    		Lapis, 20 (4), 13-18+50.
    UK
     
    • England
      • Cornwall
        • Wadebridge District
          • Area East of Wadebridge
            • St Endellion
    		Min.Mag.(1991) 55, 121-125
    Mineral and/or Locality
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