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Hellandite Group

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Big Photo

Tre Croci, Vetralla, Vico Lake, Viterbo Province, Latium, Italy
© O. Dziallas

Show Hellandite Group Photos (7)





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

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    • Localities for Hellandite Group

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    (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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