• Thumbnail for Phlogopite
    Phlogopite is a yellow, greenish, or reddish-brown member of the mica family of phyllosilicates. It is also known as magnesium mica. Phlogopite is the...
    7 KB (631 words) - 21:00, 9 January 2024
  • Thumbnail for Mica
    Paragonite Brittle micas: Margarite Common micas: Biotite Lepidolite Phlogopite Zinnwaldite Brittle micas: Clintonite Very fine-grained micas, which typically...
    42 KB (4,861 words) - 03:03, 8 July 2024
  • Thumbnail for Vermiculite
    Vermiculite forms by the weathering or hydrothermal alteration of biotite or phlogopite. Large commercial vermiculite mines exist in the United States, Russia...
    24 KB (2,769 words) - 09:33, 6 July 2024
  • Thumbnail for Kimberlite
    olivine lamproites is phlogopite macrocrysts and microphenocrysts, together with groundmass micas that vary in composition from phlogopite to "tetraferriphlogopite"...
    31 KB (3,583 words) - 20:50, 9 July 2024
  • Thumbnail for Lamproite
    forsteritic olivine; high iron leucite; titanium-rich aluminium-poor phlogopite; potassium- and titanium-rich richterite; low aluminium diopside; and...
    11 KB (1,074 words) - 04:24, 4 January 2024
  • Thumbnail for Lamprophyre
    is common) some form of volatile enrichment, to provide the biotite (phlogopite) and amphibole (pargasite) mineralogy lack of fractional crystallisation...
    17 KB (2,187 words) - 13:56, 9 May 2024
  • Thumbnail for Biotite
    series between the iron-endmember annite, and the magnesium-endmember phlogopite; more aluminous end-members include siderophyllite and eastonite. Biotite...
    16 KB (1,663 words) - 20:44, 18 January 2024
  • Thumbnail for Crater of Diamonds State Park
    that the diamondiferous epiclastic rocks range from olivine lamproite to phlogopite and olivine-rich tuffs. The chemistry of the mantle xenolith was used...
    21 KB (2,025 words) - 19:43, 11 June 2024
  • Thumbnail for Serendibite
    granite. Minerals occurring with serendibite include diopside, spinel, phlogopite, scapolite, calcite, tremolite, apatite, grandidierite, sinhalite, hyalophane...
    3 KB (124 words) - 17:21, 19 December 2023
  • Thumbnail for Ol Doinyo Lengai
    components. The silicic lavas contain combeite, ijolites, melanite, nepheline, phlogopite, and pyroxene, as well as apatite, garnet, sphene, and wollastonite. Xenoliths...
    33 KB (3,680 words) - 06:48, 30 June 2024