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About LeonardseniteHide

Specific Gravity:
2.31 (Calculated)
Crystal System:
Honors Erik Leonardsen (1934–), the former leader of the X-Ray Diffraction Laboratory of the Geological Institute, University of Copenhagen
Inverse weberite structure type.

Classification of LeonardseniteHide

Approval Year:

Pronounciation of LeonardseniteHide

PlayRecorded byCountry
Jolyon & Katya RalphUnited Kingdom

Physical Properties of LeonardseniteHide

2.31 g/cm3 (Calculated)

Chemical Properties of LeonardseniteHide

IMA Formula:
MgAlF5 · 2H2O

Crystallography of LeonardseniteHide

Crystal System:
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:
Cell Parameters:
a = 7.055(1) Å, b = 10.117(2) Å, c = 6.813(1) Å
a:b:c = 0.697 : 1 : 0.673
Unit Cell V:
486.28 ų (Calculated from Unit Cell)

X-Ray Powder DiffractionHide

Powder Diffraction Data:

Type Occurrence of LeonardseniteHide

General Appearance of Type Material:
soft and friable mass of white crystals up to 20 μm in length
Place of Conservation of Type Material:
Holotype material (Eldfell) is deposited in the collections of the Icelandic Institute of Natural History, Reykjavık, Iceland, sample number NI12256; other deposited material has the numbers 20630 (Eldfell), and NI 17067, NI 17073 and NI 17074 (Hekla)
Geological Setting of Type Material:

Synonyms of LeonardseniteHide

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for LeonardseniteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Mitolo, D., Garavelli, A., Balić-Žunić,T., Acquafredda, P. and Jakobsson, S.P. (2011): Leonardsenite, IMA 2011-059. CNMNC Newsletter No. 11, December 2011, page 2889; Mineralogical Magazine, 75, 2887-2893
Mitolo, D., Garavelli, A., Balić-Žunić, T., Acquafredda, P., & Jakobsson, S. P. (2013). Leonardsenite, MgAlF5 (H2O) 2, a new mineral species from Eldfell Volcano, Heimaey Island, Iceland. The Canadian Mineralogist, 51(3), 377-386.

Internet Links for LeonardseniteHide

Localities for LeonardseniteHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
  • Réunion
Vlastélic, I., Staudacher, T., Deniel, C., Devidal, J. L., Devouard, B., Finizola, A., & Telouk, P. (2013). Lead isotopes behavior in the fumarolic environment of the Piton de la Fournaise volcano (Reunion Island). Geochimica et Cosmochimica Acta, 100, 297-314.
Iceland (TL)
  • Southern Region
    • Rangárþing ytra
Mitolo, D., Garavelli, A., Balić-Žunić,T., Acquafredda, P. and Jakobsson, S.P. (2011): Leonardsenite, IMA 2011-059. CNMNC Newsletter No. 11, December 2011, page 2889; Mineralogical Magazine, 75, 2887-2893
    • Vestmannaeyjar
      • Vestmannaeyjar archipelago (Westman islands)
        • Heimaey island
Mitolo, D., Garavelli, A., Balić-Žunić,T., Acquafredda, P. and Jakobsson, S.P. (2011): Leonardsenite, IMA 2011-059. CNMNC Newsletter No. 11, December 2011, page 2889; Mineralogical Magazine, 75, 2887-2893
  • Campania
    • Naples
      • Somma-Vesuvius Complex
Campostrini, I., Demartin, F., Russo, M. (2013): Leonardsenite del Vesuvio (secondo ritrovamento mondiale). Micro, 3/2013, 138-141
  • Kamchatka Krai
    • Tolbachik volcano
      • Great Fissure eruption (Main Fracture)
        • Northern Breakthrough (North Breach)
          • First scoria cone (First cinder cone)
Pekov, I. V., Zubkova, N. V., Britvin, S. N., Yapaskurt, V. O., Chukanov, N. V., Lykova, I. S., ... & Pushcharovsky, D. Y. (2015). New zinc and potassium chlorides from fumaroles of the Tolbachik volcano, Kamchatka, Russia: mineral data and crystal chemistry. III. Cryobostryxite, KZnCl3· 2H2O. European Journal of Mineralogy, 27(6), 805-812
  • Alaska
    • Dillingham Census Area
Gunnar Färber
Mineral and/or Locality  
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