Mindat Logo
Home Page Log In Message Board The Mindat Directory
Register Search Pages Chat Now! (6 online) Mindat Auctions

Mereheadite

Big Photo

Torr Works Quarry (Merehead Quarry), Cranmore, Somerset, England, UK
© Ian Jones

Show Mereheadite Photos (3)
Formula:
Pb
 
2
[O|OH|Cl]
Colour:Pale yellowHardness:3½
Name:Named after Merehead quarry, Somerset, source of this and other unusual lead secondary minerals.
This page provides mineralogical data about Mereheadite.

Classification of Mereheadite

IMA status:Approved
Strunz 8th edition ID:3/D.10-80
Nickel-Strunz 10th (pending) edition ID:3.DC.45

3 : HALIDES
D : Oxyhalides, hydroxyhalides and related double halides
C : With Pb (As,Sb,Bi), without Cu
mindat.org URL:http://www.mindat.org/min-2648.html
Please feel free to link to this page.

Type Occurrence of Mereheadite

Type Locality:Torr Works Quarry (Merehead Quarry), Cranmore, Somerset, England, UK

Physical Properties of Mereheadite

Lustre:Vitreous, Resinous
Colour:Pale yellow
Streak:White
Hardness (Mohs):3½

Optical Data of Mereheadite

Type:Biaxial
RI values: nα = 2.190 nγ = 2.280
Maximum Birefringence:δ = 0.090

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:relatively strong

Chemical Properties of Mereheadite

Formula:
Pb
 
2
[O|OH|Cl]
Essential elements:Cl, H, O, Pb
All elements listed in formula:Cl, H, O, Pb

Relationship of Mereheadite 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.37Calcioaravaipaite
PbCa
 
2
[(F,OH)
 
3
|AlF
 
6
] · H
 
2
O
3.DC.40Thorikosite
Pb
 
3
[OH|(SbO
 
3
,AsO
 
3
)|Cl
 
2
]
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
3.DC.95Barstowite
Pb
 
4
[Cl
 
6
|CO
 
3
] · H
 
2
O

Other Names for Mereheadite

Synonyms:
IMA1996-045
Other Languages:
German:Mereheadit
Spanish:Mereheadita

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 Mereheadite

Reference List:Welch, M. D., Criddle, A. J. and Symes, R. F. (1998): Mereheadite, Pb2O(OH)Cl: a new litharge-related oxychloride from Merehead Quarry, Cranmore, Somerset. Mineralogical Magazine: 62: 387-393.

Articles/Blogs about Mereheadite

Internet Links for Mereheadite

Search Engines:
  • Look for Mereheadite on Google
  • Look for Mereheadite images on Google
    • External Links:
  • Look for Mereheadite on Webmineral
  • Look for Mereheadite on Athena Mineralogy
  • Look for Mereheadite on Wikipedia
  • Look for Mereheadite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Mereheadite in the Natural History Museum (London) online catalogue
  • Mereheadite details from Handbook of Mineralogy (PDF)
    • Mineral Dealers:
  • Rare and Unusual minerals at Mineralogical Research Company
  • Mineral Classics - Worldwide Collector Quality Minerals and Gems
  • The Arkenstone - Fine Minerals
  • Search for - Mereheadite - on e-Rocks Mineral Sales & Auctions
  • Buy from David K Joyce minerals
  • Wendel Minerals - Auktion & Shop
  • Find Mereheadite on www.crystalclassics.co.uk
  • Buy fine minerals and gemstones from Pala International
  • High-end worldwide specimens & outstanding customer service
  • Fabre Minerals - search for Mereheadite specimens
  • Buy Minerals and Crystals from Crystalarium.com
  • Wright's Rock Shop - excellent mineral specimens since 1970
    • Jobs:
  • Mining & Geology Jobs

    • Page Sponsor

    Sponsorship:This page is currently not sponsored. Click here to sponsor this page.

    Localities for Mereheadite

    Hide Locality List
    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.
    These maps work faster with Firefox!
    (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.
    Germany
     
    • Baden-Württemberg
      • Black Forest
        • Wolfach
          • Oberwolfach
            • Rankach valley
    		KOLITSCH, U. (2000): Eine durch Betoneinwirkung entstandene Paragenese von Blei-Verbindungen aus der Grube Clara im mittleren Schwarzwald. - Erzgräber 14, 48-53; WALENTA, K. (1999): Neue Mineralfunde von der Grube Clara. 8. Folge, 2. Teil. Lapis 24 (12), 40-44
    UK
     
    • England
      • Somerset
        • Cranmore
    		[Min.Mag.(1998) 62, 387-393; J. Russel Soc 2:2 p29]; Turner, R.W., (2005) A New Find of Lead Oxychlorides at Torr Works, Somerset. Russell Society Newsletter, No. 47, September 2005; Turner, R.W., (2006) A Mechanism for the formation of the Mineralised Mn Deposits at Merehead Quarry, Cranmore, Somerset, England. Min. Mag. vol. 70, no. 6, pp 629 - 653
        • Westbury on Trym
    		BMS Database
    Mineral and/or Locality
    Google
     
    www.mindat.org Web
    Copyright © Jolyon & Ida Ralph 1993-2008. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register.