stibiconite


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stibiconite

[′stib·ə·kə‚nīt]
(mineralogy)
Sb3O6(OH) A pale yellow to yellowish- or reddish-white mineral consisting of a basic or hydrated oxide of antimony; occurs in massive form, as a powder, and in crusts.
References in periodicals archive ?
Stibnite from the deeper zones exhibits a brilliant silvery luster, whereas in the upper zones, where oxidation has proceeded, complete pseudomorphs of stibiconite after stibnite have been found.
Crystals can be overgrown by calcite or quartz crusts, or coated by secondary stibiconite.
Locally, quartz coated stibnite that subsequently dissolved, leaving hollow quartz casts called "splinters." Stibnite alters to stibiconite (Bancroft, 1903; Lindgren and Ransome, 1906; Saunders, 1988).
Stibnite crystals in these upper-level pockets are dull-lustered or are altered to stibiconite. Only at depths of 40 to 50 meters can good, unoxidized crystals be found.
Chinese antimony deposits of the Wuling type generally contain stibnite as the main ore mineral (with stibiconite and valentinite in the oxidized zone), plus quartz, barite and calcite.
Stibiconite [Sb.sup.3+][[Sb.sup.5+].sub.2][O.sub.6](OH)
Allophane forms fine, earthy and glassy white to yellow-brown masses in vugs with kaolinite, halloysite and limonite, covered by cervantite and stibiconite aggregates (Andras, 1983).
(14-48 128th Street, College Point, NY 11356) has at least one reason to be glad of his recent shift from Russian minerals to Chinese: about 10 excellent cabinet specimens of stibiconite pseudomorphs after stibnite, from the Lushi mine, Hunan Province.
In some specimens kermesite replaces stibnite, and may itself be replaced by stibiconite. Other specimens, however, show no evidence of stibnite replacement.
Other fine antimony minerals found at the Cetine mine are cinnabar, cervantite, coquandite, kermesite, onoratoite, mopungite, senarmontite, stibiconite and valentinite.
The species has also been observed in association with bladed barite and stibiconite from the 5,260 level.
These form yellow to golden brown, waxy, bladed masses in vugs, cavities and veinlets in stibnite, sometimes with earthy patches (to 5 mm) of cream white stibiconite. Dave also had orange, splintery, acicular sideronatrite crystals (to 1 cm) in sulfur from the Sulfur pit, Crescent Valley, Eureka County.