Octasulfide pentavanadium is a binary inorganic compound of vanadium and sulfur with the formula V 5 S 8 , crystals.
| Octasulfide pentavanadium | |
|---|---|
| Are common | |
| Systematic name | Octasulfide pentavanadium |
| Traditional names | Vanadium Sulfur |
| Chem. formula | V 5 S 8 |
| Physical properties | |
| condition | crystals |
| Molar mass | 511.23 g / mol |
| Density | 7.9 g / cm³ |
| Thermal properties | |
| T. | ≈850 ° C |
Getting
- Heating a stoichiometric mixture of pure substances:
Physical Properties
Octasulfide pentavanadium forms crystals of monoclinic syngony , space group C 2 / m , cell parameters a = 1.13 nm , b = 0.66 nm , c = 0.81 nm , β = 135 ° , Z = 4 [1] [2 ] .
The compound decomposes at a temperature of ≈850 ° C and has a homogeneity range of 37.5 ÷ 42 at.% Vanadium.
At temperatures below 25 K, the compound enters an antiferromagnetic state [3] .
Notes
- ↑ Diagrams of the state of double metulic systems. Ed. N. P. Lyakishev. - M .: Mashinostroenie, 2000. - T. 3 Book 2. - 448 p. - ISBN 5-217-02932-3 .
- ↑ B. Predel. SV (Sulfur-Vanadium) // Landolt-Börnstein - Group IV Physical Chemistry. - 1998. - T. 5J . - S. 1-2 . - DOI : 10.1007 / 10551312_2669 .
- ↑ Y. Oka, K. Kosuge, S. Kachi. Magnetic properties of V 5 S 8 // Physics Letters A. - 1974. - Vol . 50 , No. 4 . - p . 311-312 . - DOI : 10.1016 / 0375-9601 (74) 90766-X .