داتولیت

Datolite is a calcium boron hydroxide nesosilicate, CaBSiO4(OH). It was first observed by Jens Esmark in 1806, and named by him from δατεῖσθαι, "to divide," and λίθος, "stone," in allusion to the granular structure of the massive mineral.

Key facts

Mineral.name: Datolite
Mineral.category: Nesosilicate
Mineral.image: Datolite-rom25c.jpg
Mineral.imagesize: 260px
Mineral.caption: Datolite on sphalerite from San Luis Potosí, Mexico (size: 6.2 x 5.3 x 2.8 cm)
Mineral.formula: CaBSiO4(OH)
Mineral.IMAsymbol: Dat
Mineral.strunz: 9.AJ.20
Mineral.system: Monoclinic
Mineral.class: Prismatic (2/m) (same H-M symbol)
Mineral.symmetry: P21/c
Mineral.unit cell: a = 9.62, b = 7.6 c = 4.84 [Å]; β = 90.15°; Z = 4
Mineral.color: Colorless or white; may be grayish, yellow, green, pale green, red, pink, etc.
Mineral.habit: Crystal prismatic, short to tabular; Botryoidal or globular with columnar structure; granular to compact; cryptocrystalline
Mineral.cleavage: None
Mineral.fracture: Conchoidal to uneven
Mineral.tenacity: Brittle
Mineral.mohs: 5 to 5.5