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Improving Mindat.orgmangan-neptunite
15th May 2005 22:02 UTCDoug Merson
Doug Merson
16th May 2005 13:56 UTCKrister
American Mineralogist (1927) Volume 12, pp. 96
Don't know if it has lost its status since.
16th May 2005 15:21 UTCJim Ferraiolo
16th May 2005 22:21 UTClaszlo
Ferro-eckermannite and ferronyböite are also valid (Mandarino & Back 2004).
I propose to remove tadzhikite-(Y), gmelinite ser. (so far all gmelinites are gmelinite-Na) and under quartz, remove var. sceptre quartz from the Mont St-Hilaire list. Sceptre quartz is a habit not a variety of quartz.
Hiortdahlite is also listed as not valid, perhaps hiortdahlite grp. or ser. may be in order as it is not known which of the hiortdahlites we have (-I or -II).
László
16th May 2005 22:30 UTClaszlo
László
17th May 2005 00:09 UTCPeter A
as far as i know hiortdahlite - I and -II are regarded the same mineral but polytypes. So hiortdalite should stand alone as the valid, and both "-I" and "-II" regarded as synonyms, as the database works now.
Regards
Peter A
19th May 2005 13:54 UTClaszlo
Mandarino & Back (2004) treat hiortdahlite I & II as separate species, Anthony et al. (Handbook) as single species (with I & II as topological variants) and the IMA official list gives hiortdahlite I (status R) and hiortdahlite II as a polymorph (status P in the MDI database). A bit confusing to say the least.
Regards
László
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Privacy Policy - Terms & Conditions - Contact Us / DMCA issues - Report a bug/vulnerability Current server date and time: April 24, 2024 12:12:24