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Phlogopite is a yellow, greenish, or reddish-brown member of the mica family of phyllosilicates. It is also known as magnesium mica.
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biotite mica magnesium igneous within association ultramafic rocks also common properties phenocryst found primary basalts optical basaltic ultrapotassic composition yellow
| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| Phlogopite | 2V angle | 16–20° | 1.00 | infobox |
| Phlogopite | Birefringence | δ =0.0280–0.0450 | 1.00 | infobox |
| Phlogopite | Category | Phyllosilicate minerals | 1.00 | infobox |
| Phlogopite | Cleavage | Perfect basal (001) | 1.00 | infobox |
| Phlogopite | Color | Brown, brownish red, dark brown, yellow, yellowish brown, green, white and gray | 1.00 | infobox |
| Phlogopite | Crystal class | Prismatic (2/m) (same H-M symbol) | 1.00 | infobox |
| Phlogopite | Crystal habit | Tabular, scaly masses, rarely perfect phenocryst tablets | 1.00 | infobox |
| Phlogopite | Crystal system | Monoclinic | 1.00 | infobox |
| Phlogopite | Diaphaneity | Transparent to translucent | 1.00 | infobox |
| Phlogopite | Formula | KMg3(AlSi3O10)(F,OH)2 | 1.00 | infobox |
| Phlogopite | Fracture | None | 1.00 | infobox |
| Phlogopite | Group | Mica group, trioctahedral mica group, biotite subgroup | 1.00 | infobox |
| Phlogopite | IMA symbol | Phl | 1.00 | infobox |
| Phlogopite | Luster | Pearly, sometimes slightly metallic on cleavage surfaces | 1.00 | infobox |
| Phlogopite | Mohs scale hardness | 2–2.5 | 1.00 | infobox |
| Phlogopite | Optical properties | Biaxial (−), 2V=12 | 1.00 | infobox |
| Phlogopite | Other characteristics | Fluorescent | 1.00 | infobox |
| Phlogopite | Refractive index | nα = 1.530–1.573 nβ = 1.557–1.617 nγ = 1.558–1.618 | 1.00 | infobox |
| Phlogopite | Space group | C2/m | 1.00 | infobox |
| Phlogopite | Specific gravity | 2.78–2.85 | 1.00 | infobox |
| Phlogopite | Streak | White | 1.00 | infobox |
| Phlogopite | Strunz classification | 9.EC.20 | 1.00 | infobox |
| Phlogopite | Tenacity | Tough, flexible thin laminae | 1.00 | infobox |
| Phlogopite | Twinning | Composition twinning | 1.00 | infobox |
| Phlogopite | is a | yellow | 0.90 | text |
| Phlogopite | is a | magnesium endmember of the biotite solid solution series | 0.90 | text |
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