Tinnunculite

Last updated
Tinnunculite
General
Category Organic mineral
Formula
(repeating unit)
C5H4N4O3 · 2H2O
IMA symbol Tnn [1]
Crystal system Monoclinic
Crystal class 2/m - prismatic
Space group '
Identification
ColorWhite
Tenacity Earthy (dull)
References [2]

Tinnunculite is a naturally-occurring form of dihydrate of uric acid. It should not be confused with a proposed mineral species with the identical name 'Tinnunculite', that forms when droppings from a European kestrel react with the burning dumps of coal mines and quarries. The name tinnunculite is derived from the kestrel's binomial name, "Falco tinnunculus", which is itself derived from the Latin word tinnunculus, meaning "kestrel", from tinnulus, meaning "shrill". [3] Tinnunculite is a naturally occurring form of the same type of origin.

Contents

The mineral is a dihydrate of uricite to which it is visually very similar. Tinnunculite is chemically similar to other organic minerals: guanine, uricite; also acetamide, kladnoite. [2] A new mineral proposal with the same name but slightly different formula (C10H12N8O8) was submitted by Chesnokov & Shcherbakova and ultimately rejected by the International Mineralogical Association (IMA) on the basis of being of anthropogenic origin. [4]

Localities

Russia: Mount Rasvumchorr, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast, Northern Region.

Related Research Articles

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<span class="mw-page-title-main">Lithiophilite</span>

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Antarcticite is an uncommon calcium chloride hexahydrate mineral with formula CaCl2·6H2O. It forms colorless acicular trigonal crystals. It is hygroscopic and has a low specific gravity of 1.715.

Efremovite is a rare ammonium sulfate mineral with the chemical formula: (NH4)2Mg2(SO4)3. It is a white to gray cubic mineral. This anhydrous sulfate occurs as constituent in sulfate crusts of burning coal dumps. It is hygroscopic and when exposed to humid air it slowly converts to the hydrate form, boussingaultite.

Boussingaultite is a rare ammonium magnesium hydrated sulfate mineral of the chemical formula: (NH4)2Mg(SO4)2 · 6 H2O. The formula of boussingaultite is that of Tutton's salts type. It was originally described from geothermal fields in Tuscany, Italy, where it occurs together with its iron analogue mohrite, but is more commonly found on burning coal dumps. The mineral possess monoclinic symmetry and forms clear, often rounded crystals.

<span class="mw-page-title-main">Awaruite</span>

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<span class="mw-page-title-main">Weeksite</span> Mineral

Weeksite is a naturally occurring uranium silicate mineral with the chemical formula: K2(UO2)2Si6O15•4(H2O), potassium uranyl silicate. Weeksite has a Mohs hardness of 1-2. It was named for USGS mineralogist Alice Mary Dowse Weeks (1909–1988).

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References

  1. Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID   235729616.
  2. 1 2 Mindat.org - Tinnunculite
  3. Jobling, James A (2010). The Helm Dictionary of Scientific Bird Names . London: Christopher Helm. pp.  266, 386. ISBN   978-1-4081-2501-4.
  4. "Tinnunculite (of Chesnokov & Shcherbakova)". Mindat.org. Retrieved 31 January 2017.

See also