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Bobdownsite

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Dr. Robert Downs
Lustre:
Vitreous
Hardness:
5
Specific Gravity:
3.14
Crystal System:
Trigonal
Name:
Named for Bob Downs (University of Arizona)
Synonym:
A synonym of Whitlockite
Described as a new mineral in 2008, as the F-dominant analogue of whitlockite.
Later, in 2018, it was discredited because it was showed that it does not contain F, which was its distinguishing characteristic as a new mineral.
F-free bobdownsite is equivalent to the mineral whitlockite, although the phase probably lies along the whitlockite-merrillite join (IMA-17E).



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Pronounciation of BobdownsiteHide

Pronounciation:
PlayRecorded byCountry
Jolyon & Katya RalphUnited Kingdom

References for BobdownsiteHide

Reference List:
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Gnos, E., et al. (2002): Sayh al Uhaymir 094: a new martian meteorite from the Oman desert: Meteoritics & Planetary Science 37, 835-854.
Tait, K.T., Barkley, M.C., Thompson, R.M., Origlieri, M.J., Evans, S.H., Prewitt, C.T. & Yang, H. (2011): Bobdownsite, a new mineral species from Big Fish River, Yukon, Canada, and its structural relationship with whitlockite-type compounds. Canadian Mineralogist, 49, 1065-1078.
CNMNC Newsletter No. 41, February 2018, page 184; European Journal of Mineralogy: 30: 183-186.
McCubbin, F.M., Phillips, B.L., Adcock, C.T., Tait, K.T., Steele, A., Vaughn, J.S., Fries, M.D., Atudorei, V., Vander Kaaden, K.E., Hausrath, E.M. (2018): Discreditation of bobdownsite and the establishment of criteria for the identification of minerals with essential monofluorophosphate (PO3F2–). American Mineralogist. 103: 1319–1328.

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