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Ashcroftine-(Y) from
Osa Quarry, Osteria dell'Osa, Rome, Metropolitan City of Rome Capital, Lazio, Italy


Locality type:Quarry
Classification
Species:Ashcroftine-(Y)
Formula:K5Na5(Y,Ca)12Si28O70(OH)2(CO3)8 · 8H2O
Comments:Reported without references in Anthony et al. (1995, reprinted 2003).
Many specimens of presumed ashcroftine-(Y) submitted for analysis resulted to be amorphous or non-crystalline (see http://forum.amiminerals.it/viewtopic.php?t=6071). According to Carlini & Signoretti (2018) the lilac, brown or creamy interlaced acicular crystals or felted masses incorrectly attributed in the past by some collectors to ashcroftine-(Y) are referable to more or less altered terms of the ludwigite-vonsenite series.
Confirmation
Validity:Erroneously Reported
Data
Mineral Data:Click here to view Ashcroftine-(Y) data
Locality Data:Click here to view Osa Quarry, Osteria dell'Osa, Rome, Metropolitan City of Rome Capital, Lazio, Italy
Data Identifiers
Mindat Occurrence Record ID:603041
Long-form Identifier:1:3:603041:4
GUID (UUID V4):0
References
Anthony, J.W., Bideaux, R.A., Bladh, K.W., and Nichols, M.C. (1995, reprinted 2003) Handbook of mineralogy. Volume II. Silica, silicates. Part 1. The Mineralogical Society of America, http://www.handbookofmineralogy.org/pdfs/ashcroftine-(Y).pdf
Carlini, R., and Signoretti, E. (2018) Il Lazio classico: le cave di leucitite della provincia di Roma (Vallerano, Laghetto e Osa). Fossils & Minerals, 4, 24-53.
 
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