| Article |
|---|
| Article name |
Bonattite of the Sherlovogorsk tin-polymetallic deposit (Transbaikal region) |
| Authors |
Yurgenson G.. , Rusal O.. , |
| Bibliographic description |
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| Category |
Earth science |
| DOI |
549.766; 54.021 |
| DOI |
10.21209/2227-9245-2020-26-2-55-62 |
| Article type |
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| Annotation |
The results of the study of the rare ephemeral natural mineral bonattite, copper sulfate with three molecules of crystalline hydrated water found in the oxidation products of tin-polymetallic ores of the Sopka Bolshaya deposit in the Sherlovogorsk ore district (Transbaikal region, Russia), are given.
Bonattite is contained in association with chalcanthite, boleite, starkeite, gypsum. They form crusts and reniform aggregates in chalcopyrite-sphalerite ore in the quarry. Bonattite has blue colour. Refractive indices: Ng 1,616 ± 0,001 – 1,617 ± 0,003, Nm 1,574 ± 0,001 – 1,578 ± 0,001, Np 1,551 ± 0,003 – 1,556 ± 0,002. Unit cell parameters are the following: a = 5,59(1) Å; b = 13,04(1) Å; c = 7,36(1) Å; β = 97,2(2)º; V = 352 Å3. The chemical composition is unstable and depends on impurities of zinc, magnesium, iron. Crystal formulas (Cu0,961Zn0,041Mg0,006)1,008(SO4)0,9973H2O and (Cu0,865Zn0,117Mg 0,011)0,993 (SO4)1,0293H2O. Copper deficiency and magnesium-zinc specialization are clearly identified. The content of molecular water was determined by the gravimetric method in the amount of 27,31…27,33 %. It emerges from bonattite at temperatures of 99,6; 121,4 ° С and in the range 230…263.6 °С. Absorption bands on the IR spectrum (cm-1) 3340,82; 2428,48; 2102,48; 1680,05; 1656,91; 1107,18; 993,37; 871,85; 628,81; 572,88; 507,30 |
| Key words |
bonattite, chalcanthite, boleite, tin-polymetallic deposit, Sopka Bolshaya, Sherlovogorsk ore district, Transbaikal region; copper sulfate; crystal hydrate water molecules; magnesium-zinc specialization |
| Article information |
Yurgenson G., Rusal O. Bonattite of the Sherlovogorsk tin-polymetallic deposit (Transbaikal region) // Transbaikal State University Journal, 2020, vol. 26, no. 2, pp. 55–62. DOI: 10.21209/2227-9245-2020-26-2-55-62. |
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