Properties of water equal to that of the hydrogen ion (), which gives a pH of 7 at 25 °C. Action of water on rock over long periods of time typically leads to weathering and water erosion, physical processes that convert solid rocks and minerals into soil and sediment, but under some conditions chemical reactions with water occur as well, resulting in metasomatism or mineral hydration, a type of chemical alteration of a rock which produces clay minerals. It also occurs when Portland cement hardens. Water ice can form clathrate compounds, known as clathrate hydrates, with a variety of small molecules that can
Ashford-in-the-Water neo-Tudor style in 1897. In the 2011 census, Ashford-in-the-Water was 99.5% White, and 0.2% Asian. Ashford-in-the-Water Ashford-in-the-Water is a village in the Derbyshire Peak District, England, and on the River Wye. It is known for the quarrying of Ashford Black Marble (a form of limestone), and for the maidens' garlands made to mark the deaths of virgins in the village until 1801. Some of these are preserved in the parish church. The civil parish population (including Sheldon) taken at the 2011 Census was 559. The name Ashford derives from the Old English "æsc" and "ford", and means a ford where