witherite

Barium is somewhat more abundant than strontium, occurring in nature largely as barytes, or heavy spar (BaSO_ {4}), and witherite (BaCO_ {3}).

An Elementary Study of Chemistry William McPherson

Barium occurs chiefly in the form of barytes or heavy spar, BaSO_4, and witherite, BaCO_3, and to a less extent in baryto-calcite, baryto-celestine, and various complex silicates.

Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 3 "Banks" to "Bassoon" Various

Barium chloride, BaCl_2 · 2H_2O, can be obtained by dissolving witherite in dilute hydrochloric acid, and also from heavy spar by ignition in a reverberatory furnace with a mixture of coal, limestone and calcium chloride, the barium chloride being extracted from the fused mass by water, leaving a residue of insoluble calcium sulphide.

Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 3 "Banks" to "Bassoon" Various

Barium carbonate, BaCO_3, occurs rather widely distributed as witherite (_q. v._), and may be prepared by the addition of barium chloride to a hot solution of ammonium carbonate, when it is precipitated as a dense white powder of specific gravity 4.3; almost insoluble in water.

Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 3 "Banks" to "Bassoon" Various

The crystals are invariably complex twins, and have the form of doubly terminated pseudo-hexagonal pyramids, like those of witherite but more acute; the faces are horizontally striated and are divided down their centre by a twin-suture, as represented in the adjoining figure.

Encyclopaedia Britannica, 11th Edition, Volume 4, Part 3 "Brescia" to "Bulgaria" Various

At the Fallowfield lead mine, near Hexham in Northumberland, it is associated with witherite; and at Bromley Hill, near Alston in Cumberland, it occurs in veins with galena.

Encyclopaedia Britannica, 11th Edition, Volume 4, Part 3 "Brescia" to "Bulgaria" Various

Baryta, oxide of barium (BaO), commonly occurs in combination with sulphuric oxide in the mineral barytes or heavy spar (BaSO_ {4}), and in combination with carbon dioxide in witherite (BaCO_ {3}).

A Text-book of Assaying: For the Use of Those Connected with Mines. Cornelius Beringer 1886

Four years later Withering’s other other work in geology was recognized in Germany, where in 1796 a new mineral was named “witherite” by Abraham Werner.

American Connections James Burke 2007

Four years later Withering’s other other work in geology was recognized in Germany, where in 1796 a new mineral was named “witherite” by Abraham Werner.

American Connections James Burke 2007