Jordanite

Général
Jordanite Catégorie II : sulfures et sulfosels^[1]

Symbole IMA	Jrd^[2]
Classe de Strunz	2.JB.30a 2 SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.) 2.J Sulfosalts of PbS Archetype 2.JB Galena derivatives, with Pb 2.JB.30a Jordanite Pb14(As,Sb)6S23 Space Group P 2₁/m Point Group 2/m 2.JB.30a Geocronite Pb14(Sb,As)6S23 Space Group P 2₁/m Point Group 2/m
Classe de Dana	3.3.1.1 Sulfures et sulfosels 3. Sulfosels
Formule chimique	Pb₁₄(As,Sb)₆S₂₃
Identification
Couleur	Gris plomb
Système cristallin	Monoclinique
Classe cristalline et groupe d'espace	Prismatique (2/m) (mêmes symboles H-M) P2₁/m
Clivage	Parfait
Cassure	Conchoïdale
Échelle de Mohs	3
Trait	Noir
Éclat	Métallique
Propriétés optiques
Pléochroïsme	Visible
Transparence	Opaque
Propriétés chimiques
Densité	6,4

Unités du SI & CNTP, sauf indication contraire.
modifier

La jordanite est un minéral sulfosel de formule chimique Pb₁₄(As,Sb)₆S₂₃ cristallisant dans le système monoclinique^[3], nommé d'après le scientifique allemand H. Jordan (1808–1887) qui le découvrit en 1864.

De couleur gris plomb (présentant fréquemment une ternissure iridescente), son trait est noir et son éclat est métallique. La jordanite a une dureté de 3 sur l'échelle de Mohs, une densité d'environ 6,4, et sa cassure est conchoïdale^[3].

Sa localité type est la carrière de Lengenbach dans la vallée de Binn, dans le canton du Valais en Suisse^[3].

Références

↑ La classification des minéraux choisie est celle de Strunz, à l'exception des polymorphes de la silice, qui sont classés parmi les silicates.
↑ (en) L.N. Warr, « IMA–CNMNC approved mineral symbols », Mineralogical Magazine, vol. 85, n^o 3,‎ 2021, p. 291–320 (DOI 10.1180/mgm.2021.43 , Bibcode 2021MinM...85..291W, S2CID 235729616)
↑ ^{a b et c} (en) « Jordanite », sur Mindat

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