...Jewel J. Glass; John S. Vhay Abstract Ludlamite, a hydrous iron phosphate, has been found in the copper-cobalt deposits in the Blackbird district, Lemhi County, Idaho. This discovery of ludlamite establishes a third verified occurrence of this mineral in the United States, the first two from New...

...C. W. Wolfe Abstract Ludlamite, hydrous iron phosphate, has been found in crystals in small veins and in large masses in triphyllite at the Palermo mine, North Groton, New Hampshire. Powder pictures of the Palermo material are identical with those of the type Cornwall material and of the Hagendorf...

... labelled “lehnerite” recently acquired in this laboratory, were determined, since such data were not given in the original description. As shown in the following table the optical properties of “lehnerite” are so near those of ludlamite as to indicate that the former is simply a manganese-magnesium bearing...

...F ig . 3. Back-scattered electron (BSE) images of Brissago phosphate masses. A) Sample BRI 10–B, graftonite groundmass (Gft) with triphylite lamellae and grains (Trp), and microgranules of ludlamite (Lud). B) Sample ZPU 76 (thin section), graftonite groundmass (Gft) with triphylite lamellae (Trp...

...Paul Brian Moore Abstract The atomic arrangements of the known Fe 2+ 3 (H 2 O) n (PO 4 ) 2 homologues are geometrically related and can be considered as progressive octahedral condensations from the higher hydrates to the lower hydrates. Included in the series are vivianite ( n = 8), ludlamite ( n...

...Fig. 6 BSE images of alteration assemblages of triphylite-II. (a, b) Triphylite-II altered to fluorapatite (sample NP-2, zone IV). (c) Triphylite-II replaced by anapaite (sample NP-30, zone IV). (d) Triphylite-II altered to ludlamite and anapaite (sample NP-30, zone IV). Abbr.: Trp-II...

...) along its cleavage planes. The final stage affecting association I corresponds to meteoric processes during which ludlamite and then vivianite progressively replaced triphylite. Association II evolved under more oxidizing conditions and the first alteration stage corresponds to the progressive oxidation...

... with siderite, mitridatite, jahnsite, whitmoreite, laueite, etc., in oxidized masses of ludlamite, messelite, and vivianite derived from parent triphylite. Copyright © 1977 by the Mineralogical Society of America 1977 ...

... of freshwater sediments. The stable and most probable phosphate minerals in reducing environments are vivianite, reddingite, and anapaite. The precipitation and dissolution of these iron phosphates (particularly vivianite and ludlamite, the dominant phases) in the Great Lakes sediments are considered...

...G. H. Faye Abstract Ludlamite from Idaho, osumilite from Oregon, axinite from Baja California, Mexico © 1972 Mineralogical Association of Canada 1972 ...

...Figure 4 Mössbauer spectra and Fe coordination polyhedra, with conventions as in Figure 1 . Lithiophilite ( Losey et al. 2004 ) DD135 contains a small amount of Fe 3+ but its spectrum is dominated by Fe 2+ ; both are in the M2 site. The spectrum of ludlamite ( Abrahams and Bernstein 1966...

... phosphates including heterosite, wolfeite, arrojadite, beryllonite, alluaudite, amblygonite, hydroxylherderite, vivianite, ludlamite, rockbridgeite, phosphosiderite and tavorite are common in miarolitic cavities and in metre-scale blocks that are formed by the alteration of primary triphylite ( Cassedanne...

... , such as phosphophyllite, Zn 2 Fe(PO 4 ) 2 (H 2 O) 4 ; ludlamite, Fe 3 (PO 4 ) 2 (H 2 O) 4 and rollandite, Cu 3 (AsO 4 ) 2 (H 2 O) 4 , have different M-coordination environments (i.e. not [6] M [4] M 2 ) and represent structural variants ( Hill, 1977 ; Abrahams and Bernstein, 1966 ; Sarp and Černy, 2000 ). T...

..., rockbridgeite (Fe 2+ 0.5 Fe 3+ 0.5 ) 2 Fe 3+ 3 (PO 4 ) 3 (OH) 5 , jahnsite-(CaMnFe) CaMn 2+ Fe 2+ 2 Fe 3+ 2 (PO 4 ) 4 (OH) 2 ⋅8H 2 O, and quartz. On a larger scale, loomisite was found in a boulder containing ludlamite Fe 2+ 3 (PO 4 ) 2 ⋅4H 2 O, vivianite Fe 2+ 3 (PO 4 ) 2 ⋅8H 2 O, and, to a lesser...

... (Figs 3 , 5 b,c ). Vivianite is stable over a wide range and also occurs late in the mineralization, forming earthy encrustations (German: `Blaueisenerde' = blue coloured clays). Ludlamite was recorded by Novák et al . ( 1996 ) as filling cracks and replacing white mica interstitially. Landesite...