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Hellandite Group

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Note: modern analyses of Hellandite-(Yb) showed it to be Hellandite-(Y).

Classification of Hellandite Group

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Relationship of Hellandite Group to other Species

Minerals structurally related to group:
Hellandite-(Ce)
(Ca,Ce)
 
6
(Al,Fe
3+
 
)Si
 
4
B
 
4
O
 
20
(OH)
 
4
Hellandite-(Y)
(Ca,Y)
 
6
(Al,Fe
3+
 
)Si
 
4
B
 
4
O
 
20
(OH)
 
4

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 Hellandite Group

Reference List:

- +
Oberti, R., Ottolini, L., Cámara, F., and Della Ventura, G. (1999) Crystal structure refinement of non-metamict Th-rich hellandite-(Ce) from Latium (Italy) and crystal chemistry of the hellandite-group minerals. American Mineralogist: 84: 913-921.

Oberti, R., G. Della Ventura, L. Ottolini, F. C. Hawthorne, P. Bonazzi: "Re-definition, nomenclature and crystal chemistry of the hellandite group", American Mineralogist (2002): 87: 745-752.
www.geo.vu.nl/~ima-cnmmn/hellandite.pdf

Internet Links for Hellandite Group

Search Engines:
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  • Localities for Hellandite Group

    (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.
    Italy
     
    • Latium
      • Rome Province
        • Sacrofano Caldera
          • Sacrofano
    M.E. Ciriotti collection (EDS probed)
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    Copyright © Jolyon Ralph and Ida Chau 1993-2011. 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. 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. Current server date and time: 22nd Jun 2011 02:21:17
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