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Leonardsenite

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About LeonardseniteHide

Formula:
MgAlF5·2H2O
Colour:
white
Lustre:
Earthy
Specific Gravity:
2.31 (Calculated)
Crystal System:
Orthorhombic
Name:
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

Approved
Approval Year:
2011

Pronounciation of LeonardseniteHide

Pronounciation:
PlayRecorded byCountry
Jolyon & Katya RalphUnited Kingdom

Physical Properties of LeonardseniteHide

Earthy
Colour:
white
Streak:
white
Density:
2.31 g/cm3 (Calculated)

Chemical Properties of LeonardseniteHide

Formula:
MgAlF5·2H2O
IMA Formula:
MgAlF5 · 2H2O

Crystallography of LeonardseniteHide

Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:
Imma
Cell Parameters:
a = 7.055(1) Å, b = 10.117(2) Å, c = 6.813(1) Å
Ratio:
a:b:c = 0.697 : 1 : 0.673
Unit Cell V:
486.28 ų (Calculated from Unit Cell)
Z:
4

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
5.66(100)
4.92(29)
3.53(27)
3.03(31)
3.00(38)
2.297(16)
1.766(19)
1.762(24)

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:
fumaroles

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

ⓘ - 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.
Iceland (TL)
 
  • Southern Region
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 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
Italy
 
  • Campania
    • Naples Province
      • Somma-Vesuvius Complex
Campostrini, I., Demartin, F., Russo, M. (2013): Leonardsenite del Vesuvio (secondo ritrovamento mondiale). Micro, 3/2013, 138-141
Réunion Island
 
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.
Russia
 
  • Kamchatka Oblast'
    • 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
USA
 
  • Alaska
    • Dillingham Borough
Gunnar Färber
Mineral and/or Locality  
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