Uricite
(repeating unit)C5H4N4O3 IMA symbol Uri[1] Strunz classification 10.CA.40 Crystal system Monoclinic Crystal class Prismatic (2/m)
(same H-M symbol) Space group P21/a Unit cell a = 14.46 Å, b = 7.4 Å
c = 6.2 Å; β = 65.2°; Z = 4 Identification Color Yellowish white, colorless, light brown Mohs scale hardness 1–2 Streak White Diaphaneity Translucent Specific gravity 1.85 (calculated) Optical properties Biaxial References [2][3][4]
(same H-M symbol)
c = 6.2 Å; β = 65.2°; Z = 4
Uricite is a rare organic mineral form of uric acid, C5H4N4O3. It is a soft yellowish white mineral which crystallizes in the monoclinic system.
Discovery and occurrence
It was first described in 1973 for an occurrence in bat guano in Dingo Donga Cave, Eucla, Western Australia.[2] The name is for its composition, anhydrous uric acid. It occurs with biphosphammite, brushite and syngenite at the type locality in Dingo Donga Cave.[3]
References
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