Chemistry:Odontolite
From HandWiki
| Odontolite | |
|---|---|
| General | |
| Category | Phosphate minerals |
| Formula (repeating unit) | Ca 5(PO 4) 3[F, OH, Cl] Fe2+3(PO4)2·8H2O |
| Strunz classification | 8.DD.15 |
| Crystal system | Triclinic |
| Crystal class | Pinacoidal (1) (same H–M symbol) |
| Identification | |
| Colour | Turquoise, blue, blue-green, green |
| Crystal habit | Massive, nodular |
| Cleavage | Perfect on {001}, good on {010}, but cleavage rarely seen |
| Fracture | Conchoidal |
| Mohs scale hardness | 5 |
| |re|er}} | Waxy to subvitreous |
| Streak | Bluish white |
| Diaphaneity | Opaque |
| Specific gravity | 3–3,2 |
| Optical properties | Biaxial (+) |
| Refractive index | nα = 1.610 nβ = 1.615 nγ = 1.650 |
| Birefringence | +0.040 |
| Pleochroism | Weak |
| Fusibility | Fusible in heated HCl |
| Solubility | Soluble in HCl |
| References | [1][2][3] |
Odontolite, also called bone turquoise or fossil turquoise or occidental turquoise, is fossil bone or ivory that has been traditionally thought to have been altered by turquoise or similar phosphate minerals such as vivianite.
References
- ↑ Hurlbut, Cornelius S.; Klein, Cornelis (1985). Manual of Mineralogy (20th ed.). New York: John Wiley & Sons. ISBN 978-0-471-80580-9. https://archive.org/details/manualofmineralo00klei.
- ↑ Turquoise, MinDat.org, http://www.mindat.org/show.php?id=4060. "Turquoise: Turquoise mineral information and data". http://www.mindat.org/min-4060.html..
- ↑ Anthony, John W.; Bideaux, Richard A.; Bladh, Kenneth W. et al., eds (2000). "Turquoise". Handbook of Mineralogy. IV. Chantilly, Virginia: Mineralogical Society of America. ISBN 978-0-9622097-3-4. http://rruff.info/doclib/hom/turquoise.pdf.
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