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Formula: Fe2+Sn4+(OH)6
Hydroxide, schoenfliesite subgroup,
paramorph of jeanbandyite
Crystal System: Isometric
Specific gravity: 4.035 calculated
Hardness: 5
Colour: Greenish brown
Solubility: Soluble in dilute hydrochloric acid
Environments
Pegmatites
Hydrothermal environments
Natanite occurs in niobium and tantalum bearing
pegmatites
(Webmin), and is formed by oxidation of earlier tin sulfides in
tin deposits
(HOM).
Localities
There are two co-type Localities, the Trudovoe Sn deposit, Inyl'chek Range, Issyk-Kul Region, Kyrgyzstan, and the
Mushiston Deposit, Kaznok Valley, Pendzhikent, Zeravshan Range, Sughd, Tajikistan.
At the Siglo Veinte mine, Llallagua, Rafael Bustillo, Potosí, Bolivia, natanite occurs extremely rarely as
pale yellow crystals to 0.2 mm on quartz and
pyrite
(Minrec 37.2.145).
At the Chat-Karagai deposit, Tallas Alatan, Talas Oblast, Kyrgyzstan, natanite occurs as an oxidation product
of hocartite, with which it is associated
(HOM).
At the Santa Eulalia Mining District, Aquiles Serdán Municipality, Chihuahua, Mexico, natanite is associated with
ilvaite, fluorite,
jeanbandyite, pyrrhotite,
siderite and quartz
(HOM).
At the Nevskoe W-Sn Deposit, Omsukchansky District, Magadan Oblast, Russia, natanite is associated with
nevskite, wolframite,
cassiterite, laitakarite and
guanajuatite
(HOM).
At the Mushiston Deposit, Kaznok Valley, Pendzhikent, Zeravshan Range, Sughd, Tajikistan, one of the type localities,
natanite occurs as an oxidation product of stannite, associated with
stannite, varlamoffite,
vismirnovite, malachite,
azurite and goethite
(AM 67.1077, HOM).
Alteration
At 750-800oC natanite breaks down to hematite and
cassiterite
(AM 67.1077).
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