Table of Contents
How strong is apatite?
Apatite
| Apatite group | |
|---|---|
| Cleavage | [0001] indistinct, [1010] indistinct |
| Fracture | Conchoidal to uneven |
| Mohs scale hardness | 5 (defining mineral) |
| Luster | Vitreous to subresinous |
What is apatite specific gravity?
note: Specific Gravity of Apatite =3.19 gm/cc.
What is the crystal habit of apatite?
| Apatite | |
|---|---|
| Color | Transparent to translucent, usually green, less often colorless, yellow, blue to violet, pink, brown. |
| Crystal habit | Tabular, prismatic crystals, massive, compact or granular |
| Crystal system | Hexagonal Dipyramidal (6/m) |
| Cleavage | [0001] Indistinct, [1010] Indistinct |
What is the most important use of apatite?
Apatite is the most commonly used mineral especially in biological environmental systems. Apatite have many applications and the most common use of apatite is in fertilizer i.e., for the production of phosphorous (Johnsson and Lemmens, 2007; Kobayashi et al., 1998; Yoshida et al., 2005; Miyaji et al., 2005).
Is apatite hard or soft?
Minerals
| Mohs hardness | Mineral | Absolute hardness |
|---|---|---|
| 5 | Apatite | 48 |
| 6 | Orthoclase feldspar | 72 |
| 7 | Quartz | 100 |
| 8 | Topaz | 200 |
Does apatite dissolve in water?
The solubility of apatite increased as the pH of water and the particle size of apatite crystals were decreased. The concentrations of dissolved ortho-PO4 3− increased in proportion to the amount of apatite added to water and apatite generally increased the pH of water at low slurry densities.
What is Sapphire’s density?
3.98 g/cc
Sapphire Properties
| GENERAL | |
|---|---|
| Chemical Formula | Al2O3 |
| Density | 3.98 g/cc |
| Hardness | 1525 – 2000 Knoop, 9 mhos |
| Melting Point | 2310 K (2040° C) |
What is the specific gravity of rock?
What is specific gravity of rocks? It is the density of a substance relative to water. For example, magnetite has a specific gravity of 5.2. This means the weight of magnetite is 5.2 times that of an equal volume of water.
Who first discovered apatite?
geologist Abraham Gottlob Werner
The mineral apatite was first recognized by German geologist Abraham Gottlob Werner (1950–1817) and named in 1786 from Greek word “ apatao ” (απα’ταω, which means to mislead, to cheat, or to deceive because the mineral was often mistaken for other species, e.g. mineral beryl (Be3Al2Si6O18, space group P6/MCC)) [43],[44 …
Is apatite a precious gem?
Apatite is a naturally occurring gemstone, largely unknown to the general public but prized by collectors for its many different colors and forms. The most common gem variety is a translucent to transparent semiprecious gemstone that is steadily increasing in popularity within the jewelry trade.