Stichtite is a mineral, a
carbonate
A carbonate is a salt of carbonic acid (H2CO3), characterized by the presence of the carbonate ion, a polyatomic ion with the formula . The word ''carbonate'' may also refer to a carbonate ester, an organic compound containing the carbonate g ...
of
chromium
Chromium is a chemical element with the symbol Cr and atomic number 24. It is the first element in group 6. It is a steely-grey, lustrous, hard, and brittle transition metal.
Chromium metal is valued for its high corrosion resistance and hardne ...
and
magnesium
Magnesium is a chemical element with the symbol Mg and atomic number 12. It is a shiny gray metal having a low density, low melting point and high chemical reactivity. Like the other alkaline earth metals (group 2 of the periodic ta ...
; formula
Mg6 Cr2 C O3(O
H)
16·4
H2O. Its colour ranges from pink through lilac to a rich purple colour. It is formed as an alteration product of
chromite
Chromite is a crystalline mineral composed primarily of iron(II) oxide and chromium(III) oxide compounds. It can be represented by the chemical formula of FeCr2O4. It is an oxide mineral belonging to the spinel group. The element magnesium can s ...
containing
serpentine. It occurs in association with
barbertonite (the
hexagonal
In geometry, a hexagon (from Greek , , meaning "six", and , , meaning "corner, angle") is a six-sided polygon. The total of the internal angles of any simple (non-self-intersecting) hexagon is 720°.
Regular hexagon
A '' regular hexagon'' has ...
polymorph of Mg
6Cr
2CO
3(OH)
16·4H
2O), chromite and
antigorite
Antigorite is a lamellated, monoclinic mineral in the phylosilicate serpentine subgroup with the ideal chemical formula of (Mg,Fe2+)3Si2O5(OH)4. It is the high-pressure polymorph of serpentine and is commonly found in metamorphosed serpentinite ...
.
[
Discovered in 1910 on the west coast of ]Tasmania
)
, nickname =
, image_map = Tasmania in Australia.svg
, map_caption = Location of Tasmania in AustraliaCoordinates:
, subdivision_type = Country
, subdi ...
, Australia
Australia, officially the Commonwealth of Australia, is a Sovereign state, sovereign country comprising the mainland of the Australia (continent), Australian continent, the island of Tasmania, and numerous List of islands of Australia, sma ...
, it was first recognised by A.S. Wesley a former chief chemist with the Mount Lyell Mining and Railway Company
Mount Lyell Mining and Railway Company was a Tasmanian mining company formed on 29 March 1893, most commonly referred to as ''Mount Lyell''. Mount Lyell was the dominant copper mining company of the West Coast from 1893 to 1994, and was based in ...
, it was named after Robert Carl Sticht
Robert Carl Sticht (8 October 1856 – 30 April 1922) was an American metallurgist and copper mine manager, active in Colorado and Montana, U.S.A. and in Tasmania, Australia. Sticht was the developer of the first successful purely pyritic smeltin ...
the manager of the mine.
It is observed in combination with green serpentine at Stichtite Hill near the Dundas Extended Mine, Dundas Dundas may refer to:
Places
Australia
* Dundas, New South Wales
* Dundas, Queensland, a locality in the Somerset Region
* Dundas, Tasmania
* Dundas, Western Australia
* Fort Dundas, a settlement in the Northern Territory 1824–1828
* Shire of ...
- east of Zeehan
Zeehan is a town on the west coast of Tasmania, Australia south-west of Burnie. It is part of the West Coast Council, along with the seaport Strahan, and neighbouring mining towns of Dundas, Rosebery and Queenstown.
History
The greater ...
, as well as on the southern shore of Macquarie Harbour
Macquarie Harbour is a shallow fjord in the West Coast region of Tasmania, Australia. It is approximately , and has an average depth of , with deeper places up to . It is navigable by shallow-draft vessels. The main channel is kept clear by the ...
. It is exhibited in the West Coast Pioneers Museum in Zeehan. The only commercial mine for stichtite serpentine is located on Stichtite Hill. Stichtite has also been reported from the Barberton District, Transvaal Transvaal is a historical geographic term associated with land north of (''i.e.'', beyond) the Vaal River in South Africa. A number of states and administrative divisions have carried the name Transvaal.
* South African Republic (1856–1902; af, ...
; Darwendale, Zimbabwe
Zimbabwe (), officially the Republic of Zimbabwe, is a landlocked country located in Southeast Africa, between the Zambezi and Limpopo Rivers, bordered by South Africa to the south, Botswana to the south-west, Zambia to the north, and Mozam ...
; near Bou Azzer, Morocco
Morocco (),, ) officially the Kingdom of Morocco, is the westernmost country in the Maghreb region of North Africa. It overlooks the Mediterranean Sea to the north and the Atlantic Ocean to the west, and has land borders with Algeria to ...
; Cunningsburgh
Cunningsburgh, formerly also known as Coningsburgh ( non, Konungsborgr meaning "King's castle"), is a hamlet and ancient parish in the south of Mainland, Shetland, Mainland, Shetland, Scotland. The hamlet is on the coast, nine miles south south w ...
, the Shetland Islands
Shetland, also called the Shetland Islands and formerly Zetland, is a subarctic archipelago in Scotland lying between Orkney, the Faroe Islands and Norway. It is the northernmost region of the United Kingdom.
The islands lie about to the no ...
of Scotland
Scotland (, ) is a country that is part of the United Kingdom. Covering the northern third of the island of Great Britain, mainland Scotland has a border with England to the southeast and is otherwise surrounded by the Atlantic Ocean to the ...
; Langban, Varmland, Sweden
Sweden, formally the Kingdom of Sweden,The United Nations Group of Experts on Geographical Names states that the country's formal name is the Kingdom of SwedenUNGEGN World Geographical Names, Sweden./ref> is a Nordic country located on ...
; the Altai Mountains
The Altai Mountains (), also spelled Altay Mountains, are a mountain range in Central Asia, Central and East Asia, where Russia, China, Mongolia and Kazakhstan converge, and where the rivers Irtysh and Ob River, Ob have their headwaters. The m ...
, Russia
Russia (, , ), or the Russian Federation, is a List of transcontinental countries, transcontinental country spanning Eastern Europe and North Asia, Northern Asia. It is the List of countries and dependencies by area, largest country in the ...
; Langmuir Township, Ontario
Ontario ( ; ) is one of the thirteen provinces and territories of Canada.Ontario is located in the geographic eastern half of Canada, but it has historically and politically been considered to be part of Central Canada. Located in Central Ca ...
and the Megantic, Quebec; Bahia, Brazil
Bahia ( , , ; meaning "bay") is one of the 26 states of Brazil, located in the Northeast Region of the country. It is the fourth-largest Brazilian state by population (after São Paulo, Minas Gerais, and Rio de Janeiro) and the 5th-largest by ...
; and the Keonjhar district
Kendujhar District, is an administrative district of Odisha. The district is one of the fifth Scheduled Areas of Odisha. The town of Kendujhar (or Kendujhargarh) is the district headquarters. The district has 3 Sub-Divisions, Anandapur, Cham ...
, Orissa, India
Odisha (English: , ), formerly Orissa ( the official name until 2011), is an Indian state located in Eastern India. It is the 8th largest state by area, and the 11th largest by population. The state has the third largest population of Sch ...
.[
It is sometimes used as a gemstone.]
File:Stichtite on serpentine Basic hydrous magnesium chromate and carbonate New Amianthus Mine Transvaal South Africa 1623.jpg, Stichtite on serpentine, New Amianthus Mine, Transvaal Transvaal is a historical geographic term associated with land north of (''i.e.'', beyond) the Vaal River in South Africa. A number of states and administrative divisions have carried the name Transvaal.
* South African Republic (1856–1902; af, ...
South Africa
References
External links
{{Commonscat
* http://www.asap.unimelb.edu.au/bsparcs/biogs/P002619b.htm Sticht, Robert Carl – Bright Sparcs Biographical entry
Magnesium minerals
Chromium minerals
Carbonate minerals
Western Tasmania
Trigonal minerals
Minerals in space group 166
Gemstones