Matches in DBpedia 2015-10 for { <http://dbpedia.org/resource/Robertsite> ?p ?o }
- Robertsite abstract "Robertsite, Ca3(Mn3+)4[(OH)3| (PO4)2]2·3(H2O) (alternatively formulated Ca2(Mn3(PO4)3O2)(H2O)3), is a secondary phosphate mineral named for Willard Lincoln Roberts (1923–1987), mineralogist and professor at South Dakota School of Mines in Rapid City, South Dakota.The type locality for Robertsite is the Tip Top mine, Custer County, South Dakota, USA. Robertsite occurs at the Tip Top Mine as minute crystal aggregates and crusts found on quartz associated with triphylite. It is a dark reddish brown to black monoclinic mineral.It occurs as a secondary mineral in pegmatite. It is also reported from the Khoa Rang Kai phosphate deposit, Chiang Mai, Thailand in a limestone guano deposit. It is associated with rockbridgeite, ferrisicklerite, leucophosphite, jahnsite, montgomeryite, collinsite and hureaulite in the type locality. In the guano deposit it occurs with carbonate-fluorapatite, calcite, dolomite, quartz and clay minerals. In the Omo Valley of Ethiopia it occurs with mitridatite associated with fossil fish in Pliocene/Pleistocene lake sediments.Recently, in an exploration conducted by the Italian La Venta Geographical Association, confirmed the existence of Robertsite in the Puerto Princesa Subterranean River National Park, located about 50 kilometres (31 mi) north of the city center of Puerto Princesa, Palawan, Philippines.Mitridatite group:Arseniosiderite-mitridatite series:Ca2(Fe3+)3[(O)2|(AsO4)3]·3H2OtoCa2(Fe3+)3[(O)2|(PO4)3]·3H2OArseniosiderite-robertsite series:Ca2(Fe3+)3[(O)2|(AsO4)3]·3H2OtoCa3(Mn3+)4[(OH)3|(PO4)2]2·3H2O↑ ↑ 2.0 2.1 2.2 ↑ ↑ ↑ ↑ ↑ ↑".
- Robertsite thumbnail Robertsite-Beraunite-220952.jpg?width=300.
- Robertsite wikiPageExternalLink 141.
- Robertsite wikiPageID "6900992".
- Robertsite wikiPageLength "5955".
- Robertsite wikiPageOutDegree "44".
- Robertsite wikiPageRevisionID "682725568".
- Robertsite wikiPageWikiLink Aggregate_(composite).
- Robertsite wikiPageWikiLink Arseniosiderite.
- Robertsite wikiPageWikiLink Beraunite.
- Robertsite wikiPageWikiLink Calcite.
- Robertsite wikiPageWikiLink Category:Manganese_minerals.
- Robertsite wikiPageWikiLink Category:Monoclinic_minerals.
- Robertsite wikiPageWikiLink Category:Phosphate_minerals.
- Robertsite wikiPageWikiLink Chiang_Mai.
- Robertsite wikiPageWikiLink Clay_mineral.
- Robertsite wikiPageWikiLink Clay_minerals.
- Robertsite wikiPageWikiLink Collinsite.
- Robertsite wikiPageWikiLink Custer_County,_South_Dakota.
- Robertsite wikiPageWikiLink Dolomite.
- Robertsite wikiPageWikiLink Ethiopia.
- Robertsite wikiPageWikiLink Ferrisicklerite.
- Robertsite wikiPageWikiLink Fluorapatite.
- Robertsite wikiPageWikiLink Fossil.
- Robertsite wikiPageWikiLink Guano.
- Robertsite wikiPageWikiLink Hureaulite.
- Robertsite wikiPageWikiLink Jahnsite.
- Robertsite wikiPageWikiLink Lake.
- Robertsite wikiPageWikiLink Leucophosphite.
- Robertsite wikiPageWikiLink Limestone.
- Robertsite wikiPageWikiLink Mitridatite.
- Robertsite wikiPageWikiLink Monoclinic.
- Robertsite wikiPageWikiLink Monoclinic_crystal_system.
- Robertsite wikiPageWikiLink Montgomeryite.
- Robertsite wikiPageWikiLink Omo_River.
- Robertsite wikiPageWikiLink Omo_Valley.
- Robertsite wikiPageWikiLink Palawan.
- Robertsite wikiPageWikiLink Pegmatite.
- Robertsite wikiPageWikiLink Philippines.
- Robertsite wikiPageWikiLink Phosphate_mineral.
- Robertsite wikiPageWikiLink Phosphate_minerals.
- Robertsite wikiPageWikiLink Pleistocene.
- Robertsite wikiPageWikiLink Pliocene.
- Robertsite wikiPageWikiLink Puerto_Princesa.
- Robertsite wikiPageWikiLink Puerto_Princesa_Subterranean_River_National_Park.
- Robertsite wikiPageWikiLink Quartz.
- Robertsite wikiPageWikiLink Rapid_City,_South_Dakota.
- Robertsite wikiPageWikiLink Rockbridgeite.
- Robertsite wikiPageWikiLink South_Dakota_School_of_Mines.
- Robertsite wikiPageWikiLink South_Dakota_School_of_Mines_and_Technology.
- Robertsite wikiPageWikiLink Thailand.
- Robertsite wikiPageWikiLink Triphylite.
- Robertsite wikiPageWikiLink Willard_Lincoln_Roberts.
- Robertsite wikiPageWikiLinkText "Robertsite".
- Robertsite wikiPageWikiLinkText "robertsite".
- Robertsite 2v "Measured: 8°".
- Robertsite birefringence "δ = 0.045".
- Robertsite caption "Robertsite spheres on beraunite".
- Robertsite category Phosphate_minerals.
- Robertsite cleavage "Very good {100}".
- Robertsite color "Red, red-brown, deep red, bronzy brown, black".
- Robertsite dana "42.08".
- Robertsite diaphaneity "Translucent".
- Robertsite formula "Ca34[3| 2]2·3H2O".
- Robertsite fracture "Micaceous".
- Robertsite gravity "3.13".
- Robertsite habit "laty to wedge-shaped, pseudorhombohedral crystals; fibrous, in botryoidal to feathery aggregates".
- Robertsite hasPhotoCollection Robertsite.
- Robertsite luster "Vitreous to resinous or waxy".
- Robertsite mohs "3".
- Robertsite name "Robertsite".
- Robertsite opticalprop "Biaxial".
- Robertsite pleochroism "Strong, X pale red to pink Y,Z deep red brown".
- Robertsite refractive "nα = 1.775 nβ = 1.820 nγ = 1.820".
- Robertsite streak "Chocolate-brown".
- Robertsite strunz "8".
- Robertsite symmetry "Monoclinic 2/m prismatic".
- Robertsite system Monoclinic.
- Robertsite system Monoclinic_crystal_system.
- Robertsite twinning "Common perpendicular to {100}".
- Robertsite unitCell "a = 17.36 Å, b = 19.53 Å, c = 11.30 Å; β = 96.0°; Z = 12".
- Robertsite wikiPageUsesTemplate Template:Cite_journal.
- Robertsite wikiPageUsesTemplate Template:Infobox_mineral.
- Robertsite wikiPageUsesTemplate Template:Reflist.
- Robertsite subject Category:Manganese_minerals.
- Robertsite subject Category:Monoclinic_minerals.
- Robertsite subject Category:Phosphate_minerals.
- Robertsite hypernym Mineral.
- Robertsite type ChemicalSubstance.
- Robertsite type Mineral.
- Robertsite type ChemicalObject.
- Robertsite type Thing.
- Robertsite type Q7946.
- Robertsite comment "Robertsite, Ca3(Mn3+)4[(OH)3| (PO4)2]2·3(H2O) (alternatively formulated Ca2(Mn3(PO4)3O2)(H2O)3), is a secondary phosphate mineral named for Willard Lincoln Roberts (1923–1987), mineralogist and professor at South Dakota School of Mines in Rapid City, South Dakota.The type locality for Robertsite is the Tip Top mine, Custer County, South Dakota, USA. Robertsite occurs at the Tip Top Mine as minute crystal aggregates and crusts found on quartz associated with triphylite.".
- Robertsite label "Robertsite".
- Robertsite sameAs Robertsita.
- Robertsite sameAs Robertsita.
- Robertsite sameAs Robertsite.
- Robertsite sameAs m.0gw6z5.
- Robertsite sameAs Q2917459.