wardite


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wardite

[′wȯr‚dīt]
(mineralogy)
Na4CaAl12(PO4)8(OH)18·6H2O A blue-green to pale green, tetragonal mineral consisting of a hydrated basic phosphate of sodium, calcium, and aluminum.
References in periodicals archive ?
The mine is also the type locality for the phosphates englishite, gordonite, millisite, montgomeryite, overite and wardite.
Davison (1840-1915) at the University of Rochester examined the material and from it extracted a new species, which he named wardite after Henry A.
But I had never seen a distinctly crystallized specimen of wardite until we had broken open that first small nodule.
Larsen (1942b) made a detailed study of the paragenetic relationships in the evolution of variscite nodules in the Clay Canyon deposit, identifying six stages: (1) variscite formation, followed by fracturing and the introduction of thin black quartz veinlets; (2) banded minerals, primarily crandallite, millisite and wardite, replacing and enclosing variscite while opening up cavities through shrinkage (some variscite nodules were entirely replaced by crandallite); (3) formation of free-growing crystals of gordonite, englishite, montgomeryite and probably overite and kolbeckite in cavities; (4) a minor reversion to crandallite formation from solution as isolated oolites; (5) apatite-group minerals; and finally (6) the limonitic phase (limonite is not present inside any of the nodules).
It occurs in cavities with wardite, replacing both wardite and variscite, and resembles gordonite, but is more platy, and the cleavage surfaces tend to be larger and curved.
Davisonite was also described as a new species from Clay Canyon by Larsen and Shannon (1930), who at first named it "dennisonite," with the intention of honoring the author of the 1896 wardite description.
Millisite forms white felted layers and irregular crusts resembling chalcedony, interlayered with green wardite.
To top it off, the Tysons offered a handful of fine thumbnail wardite specimens, with sharp, lustrous, pale blue-green pseudo-octahedral wardite crystals to 1.
5 cm on siderite druses with quartz; white hexagonal-tabular crystals of whitlockite to 2 cm; lustrous pseudo-octahedral wardite crystals to 1.
1957a) Relationship of the minerals avelinoite, cyrilovite and wardite.
One other item of interest was wardite crystals associated with childrenite and eosphorite, from the famous locality of Rapid Creek, Yukon.
Associated minerals in the cavities are: wardite, eosphorite, cyrilovite, a kidwellite-like mineral, rockbridgeite, leucophosphite, saleeite and montmorillonite.