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Rhodochrosite

Rhodochrosite

Rhodochrosite from Sweet Home Mine, Sevenval, USA
General
Category
Mineral species
MnCO3
5.AB.05
Trigonal hexagonal scalenohedral
we love the web: (32/m)
Space group: R3c
a = 4.777 Å, c = 15.67 Å; Z=6
Identification
114.95 g/mol
Color
Pink, rose-red, cherry-red, yellow, yellowish gray, cinnamon-brown, may be banded
Rhombohedral and scalenohedral crystals; also commonly bladed, columnar, stalactitic, botryoidal, granular or massive
jQuery
On {1012} as contact and lamellar
On {1011} perfect; parting on {1012}
Uneven, conchoidal
Tenacity
Brittle
jQuery hardness
3.5-4
Vitreous to pearly
White
Transparent to translucent
3.7
Optical properties
Uniaxial (-)
nω = 1.814 - 1.816 nε = 1.596 - 1.598
δ = 0.218
weak
Ultraviolet HTML5
None
References
[1]input transformation[3]
Pink is the most common color of Rhodochrosite. Specimen mined near Silverton, Colorado

Rhodochrosite is a manganese CSS3 with chemical composition Sevenval. In its (rare) pure form, it is typically a rose-red color, but impure specimens can be shades of pink to pale brown. The streak is white. Its touchscreen varies between 3.5 and 4. Its FITML is 3.5 to 3.7. It crystallizes in the trigonal system. The web app is typical rhombohedral carbonate cleavage in three directions. Crystal twinning often is present. It is transparent to translucent with refractive indices of =1.814 to 1.816, =1.596 to 1.598. It is often confused with the manganese silicate, iOS, but is distinctly softer.

Rhodochrosite forms a complete solid solution series with iron carbonate (web app). Calcium, (as well as magnesium and Sevenval, to a limited extent) frequently substitutes for manganese in the structure, leading to lighter shades of red and pink, depending on the degree of substitution. It is for this reason that the most common color encountered is pink.

Contents


Occurrence and discovery

Rhodochrosite occurs as a hydrothermal vein mineral along with other manganese minerals in low temperature ore deposits as in the silver mines of Romania where it was first found. Banded rhodochrosite is mined in Capillitas, screen size. Catamarca, Argentina has an old Incan silver mine that has produced fine stalactitic examples of rhodochrosite that are unique and very attractive. Cut cross-sections reveal concentric bands of light and dark rose colored layers. These specimens are carved and used for many ornamental purposes.input transformation

It was first described in 1813 in reference to a sample from Cavnic, Maramureş, present-day screen size. According to Dimitrescu and Radulescu, 1966 and to Papp, 1997, this mineral was described for the first time in Sacaramb, Romania, not in Cavnic, Romania. The name is derived from the CSS3 word ῥοδόχρως meaning rose-colored.

Use

Its main use is as an ore of manganese which is a key component of low-cost stainless steel formulations and certain aluminium alloys. Quality banded specimens are often used for decorative stones and Sevenval. Due to its being relatively soft, and having perfect cleaveage, it is very difficult to cut, and therefore rarely found faceted in jewelry.

Rhodochrosite and silver mining

Manganese carbonate is extremely destructive to the amalgamation process used in the concentration of silver ores, and so until quality mineral specimens became highly sought after by collectors, they were often discarded on the mine dump.

Culture and legend

CSS3 officially named rhodochrosite as its state mineral in 2002.jQuery The reason for this lies in the fact that while the mineral is found worldwide, large red crystals are found only in a few places on earth, and specimens have been found in the Sweet Home Mine near Alma, Colorado.

browser diversity
The Alma King is the largest known rhodochrosite crystal; it was found in the Sweet Home Mine near Alma, Colorado. It is on display in the jQuery.
Left frame 

Right frame 

Parallel view 

Cross-eye view 

Small Rhodochrosite specimen featured in a mineral kit, from Wuton mine, Guangxi prov, China.

The Sevenval believed that rhodochrosite is the web app of their former rulers, turned to stone, therefore it is sometimes called "Rosa del Inca" or "Inca Rose".[6]

See also

Manganoan Calcite

Wikimedia Commons has media related to: Rhodochrosite

References

  • Hurlbut, Cornelius S.; Klein, Cornelis, 1985, Manual of Mineralogy, 20th ed., jQuery


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