Inesite

Inesite Crystals from Fengjishan Mine (Daye Copper Mine), Edong Mining District, Daye County, Huangshi Prefecture, Hubei Province, China.

General
Category| Inosilicates
Formula
(repeating unit)| Ca2Mn7Si10O28(OH)2•5(H2O)
Strunz classification| 09.DL.05
Dana classification| 66.3.3.1
Crystal system| Triclinic
Space group| P1 (no.2)
Identification
Color| Rose red, pink, orange-pink, orange-red-brown
Crystal habit| Massive, fibrous, radial, spherical
Cleavage| Perfect
Fracture| Irregular/Uneven
Tenacity| Brittle
Mohs scale hardness| 5.5 - 6
|re|er}}| Vitreous, Silky
Streak| White
Diaphaneity| Translucent
Specific gravity| 3.0
Ultraviolet fluorescence| Non-fluorescent
Common impurities| Fe, Al, Mg, K
References| [1][2][3]

Inesite is a hydrous calcium manganese silicate mineral.[5] Its chemical formula is Ca2Mn7Si10O28(OH)2•5(H2O). Inesite is an inosilicate with a triclinic crystal system. It has a Mohs hardness of 5.5 to 6, and a specific gravity of 3.0. Its name originates from the Greek Ίνες (ines), "fibers" in allusion to its color and habit. [2]

## Occurrence and distribution

Inesite occurs in hydrothermal replacement deposits of manganese-rich metamorphic rocks and serpentines.[6] It was first described in 1887 at Hilfe Gottes Mine, Oberscheld, Dillenburg, Dillenburg District, Hesse, Germany. Outside of the type locality, there are several notable localities of inesite, such as:[7][8]

* Wessels and N'Chwanning Mines, Kalahari Manganese Field, Northern Cape, South Africa where Inesite is associated with datolite, pectolite, apophyllite, ruizite, orientite and quartz.

* Broken Hill, New South Wales, Australia.

* Långban, Persberg, Värmland, Sweden.

* Kawazu Mine, Shizuoka Prefecture, Chubu Region, Honshu Island, Japan

* Hale Creek Mine, Trinity County, California, USA, where Inesite is associated with Rhodochrosite, bementite, and hausmannite.

* Fengjishan Mine (Daye Copper Mine), Edong Mining District, Daye County, Huangshi Prefecture, Hubei Province, China.

Inesite Gallery

* Bright red inesite with orange prehnite from N'Chwanning II Mine, Kuruman, Kalahari Manganese Field, North Cape, South Africa

* Inesite from Hale Creek Mine,Trinity County, California, USA

* Inesite with yellow hubeite from Fengjishan Mine (Daye Copper Mine), Edong Mining District, Daye County, Huangshi Prefecture, Hubei Province, China

* Brown Inesite from Broken Hill, New South Wales, Australia

* Inesite on top of orlymanite from Wessels Mine, Hotazel, Kalahari Manganese field, Northern Cape, South Africa

## References

1. ↑ Dave Barthelmy. "Inesite Mineral Data". http://www.webmineral.com/data/Inesite.shtml#.XEvCI89Kjq1.
2. ↑ 2.0 2.1 "Inesite: Mineral information, data and localities". https://www.mindat.org/min-2031.html.
3. ↑ Wan, C.; Ghose, S. (1978). "Inesite, a hydrated calcium manganese silicate with five-tetrahedral-repeat double chains". American Mineralogist 63: 563–571.
4. ↑ Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine 85 (3): 291–320. doi:10.1180/mgm.2021.43. Bibcode: 2021MinM...85..291W.
5. ↑ Chesterman, Charles (1978). The Audubon Society Field Guide to North American Rocks And Minerals. Knopf. pp. 592.
6. ↑ The Mineral Inesite
7. ↑ "Inesite". 18 August 2001. http://rruff.info/doclib/hom/inesite.pdf.
8. ↑ http://www.minsocam.org/ammin/AM53/AM53_1614.pdf Inesite From the Broken Hill Lode, New South Wales, Australia

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