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Title: Stibiconite  
Author: World Heritage Encyclopedia
Language: English
Subject: Xikuangshan Mine, Kermesite, Antimony
Collection: Antimony Minerals, Cubic Minerals, Oxide Minerals
Publisher: World Heritage Encyclopedia


Category Oxide minerals
(repeating unit)
Strunz classification 04.DH.20
Crystal symmetry Isometric hexoctahedral
H-M symbol: (4/m 3 2/m)
Space group: F d3m
Unit cell a = 10.27 Å; Z = 8
Formula mass 478.25
Color Pale yellow to yellowish white, reddish white, orange; gray, brown, black when impure
Crystal habit Massive, botryoidal, as incrustations, powdery
Crystal system Isometric
Cleavage None
Fracture Clay-like
Mohs scale hardness 4-5
Luster Vitreous - dull
Streak light yellow
Diaphaneity Transparent to translucent
Specific gravity 4.1 - 5.8, Average = 4.94
Optical properties Isotropic
Refractive index n=1.6-1.97
References [1][2][3]

Stibiconite is an antimony oxide mineral with formula: Sb3O6(OH). Its name originates from Greek "stibi" (antimony) and "konis" (powder), alluding to its composition and habit.[1][2][3] It is a member of the pyrochlore super group.

Discovery and occurrence

It was first described in 1862 for an occurrence in the Brandholz - Goldkronach District, Fichtelgebirge, Franconia, Bavaria.[2]

It occurs as a secondary alteration product of other hydrothermal antimony minerals such as stibnite. It occurs in association with cervantite, valentinite, kermesite, native antimony and stibnite.[3]


  1. ^ a b
  2. ^ a b c
  3. ^ a b c Handbook of Mineralogy
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