Table of Contents
What is apatite in bone?
Bone mineral (also called inorganic bone phase, bone salt, or bone apatite) is the inorganic component of bone tissue. It gives bones their compressive strength. Bone mineral is formed from globular and plate structures distributed among the collagen fibrils of bone and forming yet a larger structure.
What is made of apatite?
Apatite is the most common phosphate mineral, and is the main source of the phosphorus required by plants. The bones and teeth of most animals, including humans, are composed of calcium phosphate, which is the same material as Apatite. (These biological Apatites are almost exclusively the Hydroxylapatite type.)
What kind of stone is apatite?
Apatite is a type II stone. Fairly well defined chatoyant band that is made up of finer tubular inclusions than cat’s-eye tourmaline.
Is apatite uniaxial or biaxial?
Petrographic Data File
| Apatite | ||
|---|---|---|
| Property | Value | Comments |
| Color/Pleochroism | Colorless in thin section | |
| Optic Sign | Uniaxial (-) | |
| 2V | N/A | Biaxial carbonate-apatite has a 2V of about 200 |
What is bone material called?
collagen
Modified (flattened) osteoblasts become the lining cells that form a protective layer on the bone surface. The mineralized matrix of bone tissue has an organic component of mainly collagen called ossein and an inorganic component of bone mineral made up of various salts….
| Bone | |
|---|---|
| FMA | 5018 |
| Anatomical terminology |
What is apatite commonly used for?
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).
What color is apatite?
green
Apatites are transparent to translucent, most commonly green, but can also be colorless, yellow, blue to violet, pink or brown. Transparent stones with good color, as seen here, can be faceted into gemstones. Major sources for gem quality apatite are Brazil, Burma, Madagascar, and Mexico.
Does apatite have cleavage or fracture?
Apatite
| Apatite group | |
|---|---|
| Cleavage | [0001] indistinct, [1010] indistinct |
| Fracture | Conchoidal to uneven |
| Mohs scale hardness | 5 (defining mineral) |
| Luster | Vitreous to subresinous |
Is apatite anisotropic?
Bone tissue has an anisotropic structure, associated with the collagen fibrils’ orientation and the c-axis direction of the bone apatite crystal. Bone quality is the determinant factor for mechanical properties of bone.
How is apatite used?
The primary use of apatite is as a source of phosphate in the manufacture of fertilizer and in other industrial uses.It is occasionally used as a gemstone.
Which is the same material as apatite in bones?
The bones and teeth of most animals, including humans, are composed of calcium phosphate, which is the same material as Apatite. (These biological Apatites are almost exclusively the Hydroxylapatite type.)
What’s the hardness of apatite as a mineral?
Apatite is best known for its use as an index mineral with a hardness of 5 in the Mohs Hardness Scale. It is usually green in color, but can be yellow, brown, blue, purple, pink, or colorless. These colors are often so vivid that apatite has frequently been cut as a gemstone. Apatite is a brittle material.
Where can you find apatite in the Earth?
Apatite occasionally occurs as well-formed hexagonal crystals in hydrothermal veins and pegmatite pockets. These crystals often have a very high clarity and a vivid color and have been cut into gems for collectors. Mineral collectors also enjoy these well-formed apatite crystals, and the prices paid for them often exceeds their value as gem rough.
How are apatite and phosphorite related to each other?
Apatite is the name of a group of phosphate minerals with similar chemical compositions and physical properties. They are an important constituent of phosphorite, a rock mined for its phosphorus content and used to make fertilizers, acids, and chemicals.