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
Wedding customs by country weddings in the United States follow a similar pattern to an English wedding. It traditionally follows the "white wedding" type (see also "Wedding types" below), which originates from the white color of the bride's wedding dress, but refers to an entire wedding routine. Customs and traditions vary, but common components are listed below. The purpose of inviting guests is to have them witness a couple's marriage ceremony and vows and to share in their joy and celebration. Gifts for the wedding couple are optional, although most guests attempt to give at least a token gift of their best wishes. Some