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Dravit je trigonální minerál, chemický vzorec NaMg3Al6(BO3)3Si6O18(OH)4, patřící do skupiny turmalínů (též „hnědý turmalín“). Byl pojmenován v roce 1883 Gustavem Tschermakem, podle typové lokality u řeky Drávy ve Slovinsku.
Výskyt, Parageneze & Vznik
Explore the main themes, entities and connections around Dravit. Start with the topic map, then use the sections below for research and deeper semantic analysis.
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Deeper signals for content research, entity SEO and topical coverage. The plain-language headings explain what each technical view is useful for.
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vlastnosti minerál krystaly chemický vzorec namg3al6 bo3 3si6o18 oh cm vznik svorech mramorech barva světle černohnědý tvrdost 7-7 lesk skelný
| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| Dravit | Barva | světle až tmavě černohnědý, modrý, bezbarvý | 1.00 | infobox |
| Dravit | Chemický vzorec | NaMg3Al6(BO3)3Si6O18(OH)4 | 1.00 | infobox |
| Dravit | Hustota | 3,03 - 3,18 g ⋅ cm−3 | 1.00 | infobox |
| Dravit | Index lomu | nω = 1,634 - 1,661 nε = 1,612 - 1,632 | 1.00 | infobox |
| Dravit | Kategorie | minerál | 1.00 | infobox |
| Dravit | Lesk | skelný až matný | 1.00 | infobox |
| Dravit | Rozpustnost | slabě rozpustný v HF | 1.00 | infobox |
| Dravit | Soustava | klencová | 1.00 | infobox |
| Dravit | Tvrdost | 7-7,5 | 1.00 | infobox |
| Dravit | Vryp | bílý | 1.00 | infobox |
| Dravit | Vzhled krystalu | krystaly sloupcovité s pyramidálním zakončením, stébelnaté až jehlicovité agregáty, zrnitý | 1.00 | infobox |
| Dravit | Štěpnost | špatná podle {1120}, {1011} | 1.00 | infobox |
These clusters group vocabulary that occurs around closely connected concepts in the source material.
Bridges can reveal useful research angles that are easy to miss in a flat list of related terms.