Tin(II) sulfide Tin(II) sulfide Tin(II) sulfide is a chemical compound of tin and sulfur. The chemical formula is SnS. Its natural occurrence concerns herzenbergite (α-SnS), a rare mineral. At elevated temperatures above 905K, SnS undergoes a second order phase transition to β-SnS (space group: cmcm, No. 63). in recent years, it has become evident that a new polymorph of SnS exist based upon the cubic crystal system, π-SnS (space group: P23, No. 198). Tin(II) sulfide can be prepared by reacting tin with sulfur, or tin(II) chloride with hydrogen sulfide. Tin(II) sulfide is a dark brown or black solid, insoluble in water, but
Selfportrait at 6th wedding anniversary Selfportrait at 6th wedding anniversary Self-Portrait on the sixth anniversary of marriage was painted in Paris. She had moved from Worpswede near Bremen in Germany in February 1906. Modersohn-Becker had decided to leave her husband and Worpswede forever, and devote herself entirely to art. This self-portrait was painted in the spring. She is turned to the right in front of the viewer and she watches the viewer with a searching and questioning look. She has a white cloth on her hip. Her upper body is naked and on her neck she wears an amber necklace. When Paula Modersohn-Becker painted this