Samuelsonite
| Samuelsonite | |
|---|---|
 | |
| General | |
| Category | Phosphate minerals |
| Formula | (Ca,Ba)Ca8Fe22+Mn22+Al2[(OH)2(PO4)10] |
| IMA symbol | Sms[1] |
| Strunz classification | 8.BF.10 |
| Crystal system | Monoclinic |
| Crystal class | Prismatic (2/m) (same H-M symbol) |
| Space group | C2/m |
| Unit cell | a= 18.495 Å, b= 6.805 Å c= 14.000 Å, β= 112.75°; Z = 2 |
| Identification | |
| Color | Pale yellow |
| Crystal habit | Prismatic crystals, elongated and striated |
| Cleavage | Fair on {001} |
| Mohs scale hardness | 5 |
| Luster | Adamantine, Sub-Adamantine |
| Streak | White |
| Diaphaneity | Transparent |
| Specific gravity | 3.353 |
| Optical properties | Biaxial (+) |
| Refractive index | nα = 1.645 - 1.648 nβ = 1.650 - 1.655 nγ = 1.655 - 1.667 |
| Birefringence | 0.0100-0.0190 |
| References | [2][3][4] |
Samuelsonite is a complex mineral that is found near North Groton, Grafton County, New Hampshire, US. Additionally, it is most commonly found as a secondary mineral in granite pegmatite. Samuelsonite is named after Peter B. Samuelson,[2] a prospector from Rumney, New Hampshire.
The mineral has a pale yellow color and has a hardness of 5 on Mohs scale.[3] The crystal is generally yellow, flat, and with straited crystals and blue trolleites.[5] Samuelsonite is monoclinic. There are three vectors of unequal length in this crystal system. The three vectors form a rectangular prism with a parallelogram at the base. Therefore, two of the vectors are perpendicular, while the third makes an angle that is not equal to 90°.[6] Samuelsonite has biaxial birefringence (trirefringence), meaning when light passes through the optic axis it is split into two rays due to the difference in refractive index of the ray with parallel polarized light compared to the ray with perpendicular polarized light.
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.
- ^ a b "General Samuelsonite Information". Retrieved 2 October 2010.
- ^ a b Jolyon Ralph and Ida Chau. "Samuelsonite". mindat.org. Retrieved 2 October 2010.
- ^ Handbook of Mineralogy
- ^ "Samuelsonite R080081". Retrieved 2 October 2010.
- ^ Rapp Jr. G.R., Campbell, T.J., and Roberts, W.L. (1990) Enclycopedia of Minerals (2nd Edition) 797 p. Library of Congress Cataloging, Washington, D.C.
 | This article about a specific phosphate mineral is a stub. You can help Wikipedia by adding missing information. |
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.