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Named for Michael Rumsey, Curator at Natural History Museum, London
This page provides mineralogical data about Rumseyite.

Classification of Rumseyite

IMA status:Approved 2012
mindat.org URL:http://www.mindat.org/min-42723.html
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Type Occurrence of Rumseyite

Type Locality:Torr Works Quarry (Merehead Quarry), Cranmore, Somerset, England, UK
General Appearance of Type Material:A single (approx 1mm) grain of this mineral is currently (2012) known.
Place of Conservation of Type Material:Natural History Museum, London, UK, catalogue number BM1970,110

Crystallography of Rumseyite

Crystal System:Tetragonal
Class (H-M):4/mmm (4/m 2/m 2/m) - Ditetragonal Dipyramidal
Space Group:I4/mmm
Cell Parameters:a = 4.065(1) Å, c = 12.631(7) Å
Ratio:a:c = 1 : 3.107
Unit Cell Volume:V 208.72 ų (Calculated from Unit Cell)
Comment:Aurivillius structure type
X-Ray Powder Diffraction:
6.306 (17)
3.848 (41)
2.923 (100)
2.875 (68)
2.110 (12)
2.049 (10)
1.719 (9)
1.680 (14)

Chemical Properties of Rumseyite

Simplified for copy/paste:Pb2OClF
Essential elements:Cl, F, O, Pb
All elements listed in formula:Cl, F, O, Pb

Other Names for Rumseyite

Other Languages:

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 Rumseyite

Reference List:

- +
Turner, R.W., Siidra, O.I., Krivovichev, S.V., Stanley, C.J. and Spratt. J. (2012) Rumseyite, IMA 2011-091. CNMNC Newsletter, 13(6), 808.

Mineralogical Magazine, 76, 807-817

Internet Links for Rumseyite

Search Engines:
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  • External Links:
  • Look for Rumseyite on Webmineral
  • Look for Rumseyite on Athena Mineralogy
  • Look for Rumseyite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Mineral Dealers:
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  • Fabre Minerals - search for Rumseyite specimens
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  • Search for Rumseyite on Well-Arranged Molecules
  • Buy rare minerals from Excalibur Minerals
  • SpiriferMinerals.com - high quality low prices
  • Buy from McDougall Minerals
  • Wilensky Fine Minerals
  • Buy from David K Joyce minerals
  • Find Rumseyite on www.crystalclassics.co.uk
  • Localities for Rumseyite

    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.
    (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.
    • England
      • Somerset
        • Cranmore
    Turner, R.W., Siidra, O.I., Krivovichev, S.V., Stanley, C.J. and Spratt. J. (2012) Rumseyite, IMA 2011-091. CNMNC Newsletter, 13(6), 808.
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    Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. 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 thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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