ludlamite


Also found in: Dictionary, Wikipedia.

ludlamite

[′ləd·lə‚mīt]
(mineralogy)
(Fe,Mg,Mn)3(PO4)2·4H2O A green mineral crystallizing in the monoclinic system and occurring in small, transparent crystals.
References in periodicals archive ?
Professor Ljudevit Baric of the University of Zagreb deserves the gratitude of the scientific community for his numerous publications, particularly those describing the discovery of vivianite and ludlamite at Trepca (1953, 1954, 1965).
Ludlamite is apple-green, much paler than vivianite and much rarer (Baric, 1953, 1954).
ludlamite, marcasite, opal, owyheeite, pyrrhotite, plagionite, pyrite, semseyite, siderite, sphalerite, stannite, tourmaline, valentinite, variscite, vivianite, wavellite, wurtzite; *(?
Wendell has, to put it mildly, a good aesthetic eye, and thus the viewer's own eye lingers long on practically every piece, and the longer the lingering, the better seems the specimen in question: for instance, his Mexican ludlamite, Russian sperrylite, Afghanistan lazurite, Yukon lazulite, Russian pyrochlore, Sweet Home mine rhodochrosite .
On these cabinet-sized pieces, vivianite crystals to 12 cm long sit, mostly singly, on brown matrix of pyrite and phosphates which is further adorned with sharp, bright, glassy green ludlamite crystals to 1 cm.
Hunanui has also been the source of a number of other fine specimens, available from Alfred, Rock Currier (Jewel Tunnel Imports) and others: large vivianite crystals; superb large (to 4 x 4 cm) parallel groupings of lime green ludlamite crystals on pyrite, siderite, and vivianite matrix; lustrous ferberite V-twins (to 15 x 15 cm) and several specimens (to 7 x 5 cm) of openly branched cronstedtite crystals (to 5 mm) on matrix were also offered.
Saura also had a selection of less common Spanish minerals, including ludlamite crystals to 5 mm (some with associated vivianite crystals) and groups of cronstedtite from the Brunita mine, La Union district.
For the mineral collector there was an unusually fine selection of good minerals at the Show: vanadinite from the Ramsey mine, La Paz County, Arizona; lovely transparent green vivianite from Oruro, Bolivia; malachite crystals from the Mashamba West mine, Zaire; uvite from Brumado, Brazil; sparkling white bertrandite clusters from Conselheiro Pena, Brazil; big orange scheelite crystals from Hunan, China; diamond crystals from China; gemmy green zoisites from Pakistan; azurites from Morenci, Arizona; and, from Mexico, some wonderful snow-white Santa Eulalia hemimorphite and small, deep green ludlamites.
It seems that the Huanuni tin mine is closed for commercial mining purposes, and is being worked for specimens by individual miners, so that we may expect, at best, just a trickle of these fine ludlamites until such time as the government re-opens the mine.
Having seen the ludlamites in their earlier runs, though, I found it more fun to ogle some new Bolivian things being offered at the Main Show by Alfredo Petrov (Casilla 1729, Cochabamba, Bolivia).