| Uricite | |
|---|---|
| General | |
| Category | Mineral |
| Formula (repeating unit) | C5H4N4O3 |
| IMA symbol | Uri |
| 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 | |
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. The name is for its composition, anhydrous uric acid. It occurs with biphosphammite, brushite and syngenite at the type locality in Dingo Donga Cave.
References
- 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.
- ^ Uricite on Mindat.org
- ^ Handbook of Mineralogy
- Uricite data on Webmineral
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