Molybdite
| Molybdite | |
|---|---|
 Molybdite on molybdenite from the Questa Molybdenum Mine (size: 11.0 x 6.7 x 4.1 cm) | |
| General | |
| Category | Minerals |
| Formula | MoO3 |
| IMA symbol | Myb[1] |
| Strunz classification | 4.EA.10 |
| Crystal system | Orthorhombic |
| Crystal class | Dipyramidal (mmm) H-M symbol: (2/m 2/m 2/m) |
| Space group | Pbnm |
| Unit cell | a = 3.96 Å, b = 13.85 Å, c = 3.69 Å; Z = 4 |
| Identification | |
| Color | Light greenish yellow to nearly colorless |
| Crystal habit | Flattened needles or thin plates may occur in aggregates |
| Cleavage | Perfect on {100}, district on {001} |
| Tenacity | Flexible |
| Mohs scale hardness | 3 - 4 |
| Luster | Adamantine |
| Streak | White |
| Diaphaneity | Transparent |
| Specific gravity | 4.72 |
| Optical properties | Biaxial (+) |
| Birefringence | High |
| 2V angle | Large |
| References | [2][3][4][5] |
Molybdite is the naturally occurring mineral form of molybdenum trioxide MoO3. It occurs as yellow to greenish needles and crystallizes in the orthorhombic crystal system.
Discovery and occurrence
Molybdite was first described in 1854 for and occurrence in quartz veins in the Knöttel area of Krupka, Ore Mountains, Bohemia (today in the Ústí nad Labem Region of the Czech Republic.[4] It occurs in vein cavities and as coatings in molybdenite ore veins and quartz topaz greisens. Associated minerals include molybdenite, betpakdalite and quartz.[3] The similar mineral ferrimolybdite is often misidentified as molybdite.[3]
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.
- ^ "Molybdite". Mineral Atlas (database record). Retrieved 2023-01-15.
- ^ a b c Molybdite on the Handbook of Mineralogy
- ^ a b "Molybdite". www.mindat.org. Hudson Institute of Mineralogy. Retrieved 2023-01-15.
- ^ "Molybdite Mineral Data". www.webmineral.com. Retrieved 2023-01-15.
Content Disclaimer
Informasi ini disarikan dari Wikipedia dan disajikan kembali untuk tujuan edukasi. Konten tersedia di bawah lisensi CC BY-SA 3.0. Kami tidak bertanggung jawab atas ketidakakuratan data yang bersumber dari kontribusi publik tersebut.
- The information displayed on this website is sourced in part or in whole from Wikipedia and has been adapted for the purpose of restating it. We strive to provide accurate and relevant information, however:
- There is no guarantee of absolute accuracy. Wikipedia is an open, collaborative project that can be edited by anyone, so information is subject to change.
- It is not intended to constitute professional advice. The content displayed is for informational and educational purposes only. For important decisions (e.g., medical, legal, or financial), please consult a professional.
- Content copyright. Wikipedia is licensed under the Creative Commons Attribution-ShareAlike License (CC BY-SA). This means that content may be reused with appropriate attribution and shared under a similar license.
- Responsible use. Any risk arising from the use of information from this website is entirely the responsibility of the user.