Substances & Homeopatic Remedies

Zincum arsenicosum

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Etymology

Zincum: Old German "Zinke" means tooth or sharp point, referring to the shape of the metal during the process of melting.
Arsenicum: Greek "Arsenikon" means yellow dye. It refers to the lemoncolored mineral orpiment (As2S3), which in ancient times already was used as dye-stuff. The Greek name is derived from the Arab Az-zemik which means dye from Persia.

Family

Traditional name

English: zinc arsenite and zinc arsenate.
German: Zinkarsenid.
Dutch: zinkarsenaat.

Used parts

Dilution of the chemical substance. The Dutch homeopathic farmacy VSM makes the remedy from zinc arsenate; in old MM you see mentioned Zinc arsenite.

Classification

Zincum: Iron-sery - Column 12
Arsenicum: Iron-sery - Column 15
Zincum arsenite: Zn(AsO2)2; Molecular weight: 279. Zincum arsenate: Zn3As2O8; Molecular weight: 474

Keywords

zinc
arsenicum

Original proving

No proving; probably only toxicological symptoms or symptoms derived from properties of Zinc. and Ars.

Description of the substance

In nature the zinc arsenate occurs in the minerals Adamite and  Kolligite.

Mineral Adamite
Chemistry: Zn2AsO4(OH), Zinc Arsenate Hydroxide
Class: Phosphate Class
Subclass: Arsenates
Uses: Only as mineral specimens
Specimens
Adamite is a favorite among collectors of fluorescent minerals because of its consistent bright green fluorescence under short and long UV light. It also makes a wonderful mineral specimen in ordinary light. The typical lime green color of its adamantine (high luster) crystals set on top of its commonly associated red limonite matrix make specimens particularly attractive.
Adamite is isostructural with the minerals cuproadamite - (Cu, Zn)2(AsO4)(OH), olivenite - Cu2AsO4(OH) and libethenite - Cu2PO4(OH). This means that they share the same symmetry and similar crystal shapes. Cuproadamite, which is intermediate between adamite and olivenite, is not completely recognized as a different mineral from adamite but is becoming accepted in ordinary usage.
Adamite is not easy to mistake for any other mineral. Its bright green fluorescence, high luster, "sub" botyroidal crystal habit, high density, associations, typical bright green color and double triangle terminations make it both an exquisite specimen for a collection and an easy identification. Adamite typically shows a radiating habit that is intermediate between a simple druse and a botryoidal habit which gives a nice glimpse into how botryoidal habits form.
PHYSICAL CHARACTERISTICS:
Color is typically green due to trace amounts copper and or uranium, yellow, rarely white and occasionally purple due to trace amount of cobalt.
Luster is adamantine.
Transparency: Crystals are transparent to translucent.
Crystal System is orthorhombic; 2/m 2/m 2/m
Crystal Habits include diamond shaped, wedge-like prisms sometimes modified with minor prismatic faces and terminated by a double triangle. Mostly in druses and radiating clusters that can form wheel and wheat sheaf shapes. Rarely in a perfectly smooth botryoidal habit like smithsonite, but commonly found with well formed double triangular crystal terminations that sparkle on the top of the "sub" botryoidal surface.
Cleavage is perfect in two directions at non-right angles to each other (domal).
Fracture is conchoidal.
Hardness is 3.5.
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Kottigite
Chemistry: Zn3(AsO4)2-8(H2O) , Hydrated Zinc Arsenate
Class: Phosphates
Group: Vivianite
Uses: A very minor ore of zinc and mineral specimens
Specimens
Kottigite is a weathering product of zinc minerals such as sphalerite. Kottigite is isostructural with the minerals erythrite and annabergite. Isostructural means that the two minerals have the same structure but different chemistries. Annabergite, called "Nickel Bloom", is bright green. Erythrite, called "Cobalt Bloom". is bright red-purple. Kottigite is too rare to have nicknames like those of erythrite and annabergite. Those names were given to them by miners looking for cobalt and nickel minerals. Most kottigite, or as it is sometimes spelled, koettigite, is found at Mapimi, Mexico and Schneeburg, Germany.
PHYSICAL CHARACTERISTICS:
Color is brown to reddish or white and gray.
Luster is vitreous.
Transparency: Crystals are transparent to translucent.
Crystal System is monoclinic; 2/m
Crystal Habits include flattened striated blades or radiating accicular crystals, but crystals are uncommon. More commonly as crusts or earthy masses.
Cleavage is perfect in one direction.
Fracture is uneven.
Hardness is 2.5 - 3
Specific Gravity is approximately 3.3 (average for translucent minerals)
Streak is pale brown.
Associated Minerals are limonite, smithsonite, adamite and other zinc minerals.
Other Characteristics: Blades are somewhat flexible.
Notable Occurrences include Mapimi, Durango, Mexico and Schneeberg, Germany.
Best Field Indicators are color, associations and crystal habit.

Specific Gravity is approximately 4.4 (heavy for translucent minerals)
Streak is white to pale green.
Other Characteristics: Strongly fluoresces green in short and long UV light.
Associated Minerals are legrandite, limonite, smithsonite, austinite, paradamite, aragonite, calcite, mimetite, conichalcite and other oxidation zone minerals.
Notable Occurrences include the famous mines at Mapimi, Mexico; also Greece and California and Utah, USA.
Best Field Indicators are crystal habit, color, luster, density, fluorescences and associations.