Recent data have confirmed that gugiaite does differ from meliphanite optically and structurally ( Grice and Hawthorne 2002 ).
2.
Gugiaite is a melilite and is distinctly different from other beryllium minerals such as meliphanite and leucophanite ( Grice and Hawthorne 2002 ).
3.
Shortly after the discovery of gugiaite, it was noted that a new name was unnecessary as it could have been considered an end member of meliphanite, ( Ca, Na ) 2Be ( Si, Al ) 2 ( O, F ) 2 differing mainly in containing much less Na and F ( Fleischer 1963 ).
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