Mindat Logo
Home Page Log In Message Board The Mindat Directory
Register Search Pages Chat Now! (2 online) Mindat Auctions

Eldfellite

Formula:
NaFe
3+
 
(SO
 
4
)
 
2
System:MonoclinicColour:yellowish-green to ...
Name:Named for type locality, Eldfell volcano, Heimaey, Iceland
Isostructural with:Yavapaiite


Yavapaiite Group.
The Na analogue of Yavapaiite.

Water-sensitive and relatively unstable under ambient conditions.

Classification of Eldfellite

IMA status:Approved 2007
Nickel-Strunz 10th (pending) edition ID:7.AC.15

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
A : Sulfates (selenates, etc.) without additional anions, without H2O
C : With medium-sized and large cations
Dana 8th edition ID:28.3.4.2

28 : ANHYDROUS ACID AND NORMAL SULFATES
3 : AXO4
mindat.org URL:http://www.mindat.org/min-35791.html
Please feel free to link to this page.

Type Occurrence of Eldfellite

Type Locality:Eldfell, Heimaey, Heimaey island, Vestmannaeyjar archipelago (Westman islands), Iceland
General Appearance of Type Material:soft, fragile aggregates of thin platy crystals
Associated Minerals at type locality:
TamarugiteRalstoniteOpalHematiteGypsum
BassaniteAnhydrite

Occurrences of Eldfellite

Geological Setting:fumarolic

Physical Properties of Eldfellite

Colour:yellowish-green to greenish-white
Streak:white
Density (calculated):3.062 g/cm3

Crystallography of Eldfellite

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Space Group:B2/m {B1 1 2/m} {C2/m} {C1 2/m 1}
Cell Parameters:a = 8.0 43(4) Å, b = 5.139(2) Å, c = 7.115(4) Å
β = 92.13(2)°
Ratio:a:b:c = 1.557 : 1 : 1.385
Unit Cell Volume:V 293.9 ų
Z:2
X-Ray Powder Diffraction:
d-spacingIntensity
3.73 (80)
3.64 (50)
3.43 (50)
2.77 (100)
2.72 (60)
2.57 (30)
2.370 (60)

Chemical Properties of Eldfellite

Formula:
NaFe
3+
 
(SO
 
4
)
 
2
Essential elements:Fe, Na, O, S
All elements listed in formula:Fe, Na, O, S
Empirical Formula:
NaFe
3+
 
(SO
 
4
)
 
2

Relationship of Eldfellite to other Species

Member of Group:
Yavapaiite Group:
Related Minerals - Nickel-Strunz Grouping):

- +
7.AC.05Vanthoffite
Na
 
6
Mg(SO
 
4
)
 
4
7.AC.10Efremovite
(NH
 
4
)
 
2
Mg
 
2
(SO
 
4
)
 
3
7.AC.10Langbeinite
K
 
2
Mg
 
2
(SO
 
4
)
 
3
7.AC.10Manganolangbeinite
K
 
2
Mn
 
2
(SO
 
4
)
 
3
7.AC.15Yavapaiite
KFe(SO
 
4
)
 
2
7.AC.20Godovikovite
NH
 
4
(Al,Fe)(SO
 
4
)
 
2
7.AC.20Sabieite
NH
 
4
Fe(SO
 
4
)
 
2
7.AC.25Thenardite
Na
 
2
SO
 
4
7.AC.30Metathenardite
Na
 
2
SO
 
4
7.AC.35Aphthitalite
(K,Na)
 
3
Na(SO
 
4
)
 
2

Other Names for Eldfellite

Synonyms:
IMA2007-051
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 Eldfellite

Reference List:Stoiber, R.E. & Rose, W.I., Jr. (1969): Recent volcanic and fumarolic activity at Santiaguito volcano, Guatemala. Bulletin of Volcanology, 33, 475-502.

Balic-Zunic, T. et al.(2009): Eldfellite, a new fumarolic mineral from Eldfell volcano, Iceland. Mineralogical Magazine 73,51-57(2009)

Internet Links for Eldfellite

Search Engines:
  • Look for Eldfellite on Google
  • Look for Eldfellite images on Google
    • External Links:
  • Look for Eldfellite on Webmineral
  • Look for Eldfellite on Athena Mineralogy
  • Look for Eldfellite on Wikipedia
  • Look for Eldfellite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Eldfellite in the Natural History Museum (London) online catalogue
    • Mineral Dealers:
  • SpiriferMinerals.com - high quality specimens
  • Top quality minerals from Kristalle of California
  • Find Eldfellite on www.crystalclassics.co.uk
  • Wendel Minerals - Auktion & Shop
  • Buy fine minerals and gemstones from Pala International
  • Wright's Rock Shop - excellent mineral specimens since 1970
  • Edwards Minerals - Fine Specimens
  • Fine Minerals from Dan Weinrich Minerals
  • Buy minerals from Mineralium.com
  • Lapis Mineral Magazin
  • Wilensky Fine Minerals
  • Buy from David K Joyce minerals
    • Jobs:
  • Mining & Geology Jobs

    • Page Sponsor

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

    Localities for Eldfellite

    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.
    (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.
    Guatemala
     
    • Quetzaltenango Department
      • El Palmar
    		Stoiber, R.E. & Rose, W.I., Jr. (1969): Recent volcanic and fumarolic activity at Santiaguito volcano, Guatemala. Bulletin of Volcanology, 33, 475-502.
    Iceland
     
    • Vestmannaeyjar archipelago (Westman islands)
      • Heimaey island
        • Heimaey
    		Min. Mag. 73,51-57(2009)
    Mineral and/or Locality
    Google
     
    www.mindat.org Web
    Copyright © Jolyon Ralph and Ida Chau 1993-2009. 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. Current server date and time: 23rd Oct 2009 00:44:33