01404nas a2200181   4500008004100000245008900041210006900130300001200199490000700211520082100218653002301039653002301062653003001085100002401115700002201139700001301161856004801174       2008                        eng d00aDiscover of Flourine-Dominant Dravite near Gouverneur, St. Lawrence County, New York0 aDiscover of FlourineDominant Dravite near Gouverneur St Lawrence  a320-3320 v833 a<p>In 1999, Hawthorne and Henry published a proposed classification scheme for the tourmaline group. They reexamined the currently approved fourteen end-members of the tourmaline-group minerals and identified potential new end-members based on their&nbsp; compositional variations. They organized all of them into three groups: alkali tourmalines, calcic tourmalines, and X-site vacant tourmalines. One of these, a potential new end-member alkali tourmaline, is fluorine-dominant dravite, which they designated fluor-dravite, NaMg3Al6Si6O18(BO3)3(OH)3F. In this article we report a significant occurrence of fluorine-dominant dravite in crystallized specimens of interest to collectors. We think this is a new tourmaline species, and a proposal to the International Mineralogical Association will be submitted.</p>
10aalkali tourmalines10acalcic tourmalines10aX-site vacant tourmalines1 aChamberlain, S., C.1 aLupulescu, M., V.1 aRowe, R.  uhttp://dx.doi.org/10.3200/RMIN.83.4.320-327