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Marianoite

A synonym of Wöhlerite
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Formula:
Na2Ca4(Nb,Zr)2(Si2O7)2(O,F)4
Lustre:
Vitreous, Greasy
Hardness:
6
Specific Gravity:
3.45 (Calculated)
Crystal System:
Monoclinic
Name:
Named for Anthony Nicola Mariano (b. 1930), of Carlisle, Massachusetts, USA, mineralogist, exploration geologist and petrographer, in recognition of his contributions to the study of alkaline rocks and carbonatites. He is an expert on rare-earth elements (REEs), niobium, tantalum and other rare metals.
Synonym:
A synonym of Wöhlerite
The validity of marianoite as a distinct species in the wöhlerite group (cuspidine group) has been questioned, see Merlino & Mellini (2009) and Chakhmouradian & Mitchell (2009).
It was formally discredited by IMA in September 2020 CNMNC Newsletter 57: IMA 20D, as it is identical to wöhlerite.


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Unique IdentifiersHide

Mindat ID:
28995 (as Marianoite)
4303 (as Wöhlerite)
Long-form identifier:
mindat:1:1:28995:9 (as Marianoite)
mindat:1:1:4303:4 (as Wöhlerite)
GUID
(UUID V4):
69fb302e-f570-4a7e-a340-1d2473b08c34 (as Marianoite)
b7134864-5313-4986-bae0-76b838e01342 (as Wöhlerite)

Internet Links for MarianoiteHide

References for MarianoiteHide

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