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Scandium minerals in the miaroles of granite at Baveno, Italy

Carlo Maria Gramaccioli, Italo Campostrini and Paolo Orlandi
Scandium minerals in the miaroles of granite at Baveno, Italy
European Journal of Mineralogy (December 2004) 16 (6): 951-956


The discovery of bazzite [Be (sub 3) Sc (sub 2) Si (sub 6) O (sub 18) ] in the granites at Baveno, Italy, dates back to 1915, just a few years after the discovery in Norway of thortveitite, the first known scandium mineral (1911). In 1982 two new scandium minerals, cascandite [CaScSi (sub 3) O (sub 8) (OH)] and jervisite [NaScSi (sub 2) O (sub 6) ] were discovered as additional rarities at Baveno. Owing to the increased activity of collectors, a number of additional finds of bazzite have resulted; similarly, other scandium minerals were recognized to be present, among which thortveitite (Orlandi, 1990) and scandiobabingtonite [Ca (sub 2) FeScSi (sub 5) O (sub 14) (OH)] (Orlandi et al., 1998), the former sometimes affording interesting blue, Mn-bearing specimens (Gramaccioli et al., 2000b). On considering all these discoveries, five of the nine scandium minerals known so far occur at Baveno, which is the type locality for four of them. However, scandium phosphates such as kolbeckite [ScPO (sub 4) 2H (sub 2) O] and pretulite [ScPO (sub 4) ] which are relatively diffuse in nature are absent. A possible reason for such a situation is linked to the particular process of formation of these minerals at Baveno, which most probably involves disruption of REE/Sc fluoride complexes following the deposition of relatively abundant fluorite and zinnwaldite from the solutions; there is marked similarity with the Norwegian locality of Heftetjaern, Tordal, where fluorite is common and many of the Sc-bearing species are the same as at Baveno.

ISSN: 0935-1221
EISSN: 1617-4011
Serial Title: European Journal of Mineralogy
Serial Volume: 16
Serial Issue: 6
Title: Scandium minerals in the miaroles of granite at Baveno, Italy
Affiliation: Universita di Milano, Dipartimento di Scienze della Terra, Milan, Italy
Pages: 951-956
Published: 200412
Text Language: English
Publisher: Schweizerbart'sche Verlagsbuchhandlung (Naegele u. Obermiller), Stuttgart, Federal Republic of Germany
Accession Number: 2005-023465
Categories: General mineralogyIgneous and metamorphic petrology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 1 table
N36°30'00" - N47°30'00", E06°30'00" - E19°00'00"
Secondary Affiliation: Universita di Pisa, ITA, Italy
Country of Publication: Germany
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute.
Update Code: 200512
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