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UM1990-21-F:AlCaHMgNa

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Formula:
(Na,Ca)2(Mg,Al)2F6(OH,O,F)
ideal author's formula: Na2Mg2(F,OH)6.H2O
Specific Gravity:
3.06 (Calculated)
Crystal System:
Isometric
Synonym:
A synonym of Fluornatrocoulsellite
Originally recognized as a Ca-bearing ralstonite-like mineral (UM199O-21-F:AlCaHMgNa) by Birch and Spring (1990). Later fully characterized as a new species by Birch et al. (2009). Chemically somewhat resembling UM1941-01-F:AlCaHMgNa.

As octahedral crystals, up to 2 mm in size; associated with morinite, gearksutite, alkali feldspar, siderite, and vivianite, sitting on quartz and fluorite.


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Unique IdentifiersHide

Mindat ID:
51809 (as UM1990-21-F:AlCaHMgNa)
39766 (as Fluornatrocoulsellite)
Long-form identifier:
mindat:1:1:51809:1 (as UM1990-21-F:AlCaHMgNa)
mindat:1:1:39766:5 (as Fluornatrocoulsellite)

Similar NamesHide

UM1936-01-F:AlCaHMgNaS(Na,K)9(Mg,Ca)7(Al,Fe)13[(S,Si)O4]4(F,Cl)36(OH)10 · 11H2O
UM1941-01-F:AlCaHMgNaNaCaMgAl3F14 · 4H2O

Internet Links for UM1990-21-F:AlCaHMgNaHide

References for UM1990-21-F:AlCaHMgNaHide

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