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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.
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copper mineral prismatic zeolites nesosilicate monoclinic localities associated minerals lake superior region botryoidal cabsio4 oh granular structure system luster vitreous
| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| Datolite | 2V angle | Measured: 74° | 1.00 | infobox |
| Datolite | Birefringence | δ = 0.044 | 1.00 | infobox |
| Datolite | Category | Nesosilicate | 1.00 | infobox |
| Datolite | Cleavage | None | 1.00 | infobox |
| Datolite | Color | Colorless or white; may be grayish, yellow, green, pale green, red, pink, etc. | 1.00 | infobox |
| Datolite | Crystal class | Prismatic (2/m) (same H-M symbol) | 1.00 | infobox |
| Datolite | Crystal habit | Crystal prismatic, short to tabular; Botryoidal or globular with columnar structure; granular to compact; cryptocrystalline | 1.00 | infobox |
| Datolite | Crystal system | Monoclinic | 1.00 | infobox |
| Datolite | Diaphaneity | Transparent to translucent, rarely opaque | 1.00 | infobox |
| Datolite | Dispersion | r > v; weak | 1.00 | infobox |
| Datolite | Formula | CaBSiO4(OH) | 1.00 | infobox |
| Datolite | Fracture | Conchoidal to uneven | 1.00 | infobox |
| Datolite | IMA symbol | Dat | 1.00 | infobox |
| Datolite | Luster | Vitreous, rarely subresinous on fracture surface | 1.00 | infobox |
| Datolite | Mohs scale hardness | 5 to 5.5 | 1.00 | infobox |
| Datolite | Optical properties | Biaxial (-) | 1.00 | infobox |
| Datolite | Refractive index | nα = 1.626 nβ = 1.653 - 1.654 nγ = 1.670 | 1.00 | infobox |
| Datolite | Space group | P21/c | 1.00 | infobox |
| Datolite | Specific gravity | 2.96 – 3.00 | 1.00 | infobox |
| Datolite | Strunz classification | 9.AJ.20 | 1.00 | infobox |
| Datolite | Tenacity | Brittle | 1.00 | infobox |
| Datolite | Ultraviolet fluorescence | Fluoresces blue under SW UV | 1.00 | infobox |
| Datolite | Unit cell | a = 9.62, b = 7.6 c = 4.84 [Å]; β = 90.15°; Z = 4 | 1.00 | infobox |
| Datolite | is a | calcium boron hydroxide nesosilicate | 0.90 | text |
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