1-20 OF 34 RESULTS FOR

bobierrite

Results shown limited to content with bounding coordinates.
Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Journal Article
Published: 01 December 2002
Mineralogical Magazine (2002) 66 (6): 1063–1073.
...R. L. Frost; W. Martens; P. A. Williams; J. T. Kloprogge Abstract The molecular structure of the three vivianite-structure, compositionally related phosphate minerals vivianite, baricite and bobierrite of formula M 3 2+ (PO 4 ) 2 .8H 2 O where M is Fe or Mg, has been assessed using a combination...
FIGURES | View All (6)
Journal Article
Published: 01 October 1986
American Mineralogist (1986) 71 (9-10): 1229–1233.
...Shozo Takagi; Mathai Mathew; Walter E. Brown Abstract The crystal structures of two forms of Mg 3 (PO 4 ) 2 ·8H 2 O, bobierrite (I) and the synthetic polymorph (II), have been determined by single-crystal X-ray diffraction. Crystal data for polymorph I are space group C 2/ c, a = 4.667(1), b...
Journal Article
Published: 01 June 1963
American Mineralogist (1963) 48 (5-6): 635–641.
...[Mg(NH 4 ) 2 H 2 (PO 4 ) 2 ·4H 2 O], density (calc.) 1.83. Synthetic bobierrite, Mg 3 (PO 4 ) 2 ·8H 2 O, differs only slightly from the mineral varieties and has α = 1.501±0.002, β =1.513 ± 0.002, γ = 1.536±0.002; 2V large (calc. 73°); ZAc = 24.5°. The strongest x -ray lines are: 6.96 Å (100), 2.94 Å...
Journal Article
Published: 01 May 1943
American Mineralogist (1943) 28 (5): 339–340.
...John W. Gruner; C. R. Staufeer Abstract Bobierrite has been found in several places as small crystals in guano, and also as nodules. The occurrence described here is in a fossil elephant tusk. The tusk belongs to the species Archidiskodon imperator (Leidy) the type of which was found in Pleistocene...
Image
The crystal structures of vivianite and <b>bobierrite</b>: (a) vivianite projected...
Published: 01 January 2002
Figure 34. The crystal structures of vivianite and bobierrite: (a) vivianite projected onto (001); (b) vivianite projected onto (010); (c) bobierrite projected onto (100); (d) bobierrite projected onto (010). (Fe 2+ ϕ 6 ) octahedra are square-pattern-shaded, (Mgϕ 6 ) octahedra are shadow-shaded
Journal Article
Published: 01 February 2006
The Canadian Mineralogist (2006) 44 (1): 117–123.
.... The mineral was found as groups (up to 3 × 2 cm) of small spherulites (up to 0.5 mm diameter) and rosettes (up to 0.05 mm diameter) of well-shaped tabular crystals growing on walls of leached fissures in dolomitic carbonatite. The associated minerals are bakhchisaraitsevite, bobierrite, magnetite, kovdorskite...
FIGURES
Journal Article
Published: 01 December 2000
The Canadian Mineralogist (2000) 38 (6): 1477–1485.
..., pyrochlore, several generations of magnetite, pyrite, rutile, a ternovite-like phase, catapleiite, bobierrite, rimkorolgite, juonniite, strontiowhitlockite, collinsite (including a Sr-rich variety) and chlorite. Gladiusite occurs as acicular aggregates and as free-standing radial clusters (<2 mm...
FIGURES | View All (5)
Journal Article
Published: 01 January 2012
American Mineralogist (2012) 97 (1): 19–25.
... crystal aggregates in thin zones in fine-grained opal-zeolite aggregate on the north slope of Cerro Mejillones, Antofagasta, Chile. Closely associated minerals are bobierrite, opal, clinoptilolite-Na, clinoptilolite-K, and gypsum. Mejillonesite forms orthorhombic, prismatic, and elongated thick tabular...
FIGURES | View All (5)
Journal Article
Published: 01 February 1950
American Mineralogist (1950) 35 (1-2): 108–115.
...Robert L. Manly, Jr. Abstract Fourteen samples of phosphates were studied by differential thermal analysis, x -ray, and petrographic methods. Minerals such as variscite, bolivarite, lazulite, wavellite, evansite, bobierrite, vivianite, and zepharovichite (?) give endothermic reactions at low...
Image
Raman spectra of the hydroxyl-stretching region of ( a ) vivianite, ( b ) b...
Published: 01 December 2002
F ig . 1. Raman spectra of the hydroxyl-stretching region of ( a ) vivianite, ( b ) baricite and ( c ) bobierrite.
Image
IR spectra of the hydroxyl-stretching region of ( a ) vivianite, ( b ) bari...
Published: 01 December 2002
F ig . 2. IR spectra of the hydroxyl-stretching region of ( a ) vivianite, ( b ) baricite and ( c ) bobierrite.
Image
IR spectra of the water HOH-bending region of ( a ) vivianite, ( b ) barici...
Published: 01 December 2002
F ig . 3. IR spectra of the water HOH-bending region of ( a ) vivianite, ( b ) baricite and ( c ) bobierrite.
Image
Raman spectra of the phosphate-stretching region of ( a ) vivianite, ( b ) ...
Published: 01 December 2002
F ig . 4. Raman spectra of the phosphate-stretching region of ( a ) vivianite, ( b ) baricite and ( c ) bobierrite.
Image
IR spectra of the PO 4 -stretching region of ( a ) vivianite, ( b ) baricit...
Published: 01 December 2002
F ig . 5. IR spectra of the PO 4 -stretching region of ( a ) vivianite, ( b ) baricite and ( c ) bobierrite.
Image
Raman spectra of the low-wavenumber region of ( a ) vivianite, ( b ) barici...
Published: 01 December 2002
F ig . 6. Raman spectra of the low-wavenumber region of ( a ) vivianite, ( b ) baricite and ( c ) bobierrite.
Image
Crystals of bakhchisaraitsevite in hydrothermal assemblage with colorless b...
Published: 01 August 2000
F ig . 1. Crystals of bakhchisaraitsevite in hydrothermal assemblage with colorless bobierrite on dolomite from a cavity in a deformed vein of dolomite carbonatite. Photographed by Nataly A. Pekova, Fersman Mineralogical Museum, Moscow, Russia.
Journal Article
Published: 01 October 2005
The Canadian Mineralogist (2005) 43 (5): 1799–1801.
... specimens (see, e.g. , magnetite on pp. 146–147, or page-sized bobierrite on p. 238) were photographed professionally, had I not known that the senior author is as skillful with a camera as he is with a drawing pen. The quality of paper, printing and binding is very high, and the color reproduction...
Journal Article
Published: 01 February 2008
Mineralogical Magazine (2008) 72 (1): 429–431.
..., or minor amounts of other hydrous phosphate minerals such as bobierrite [Mg 3 (PO 4 ) 2 ·8H 2 O] or baricite [(Mg,Fe) 3 (PO 4 ) 2 ·8H 2 O]. No detectable As was found in the natural vivianite material. The natural vivianite material takes up only 5% of the 200 ppb As(III) at pH 11 and 4°C (Fig. 1...
FIGURES
Journal Article
Published: 01 August 2000
The Canadian Mineralogist (2000) 38 (4): 831–838.
...F ig . 1. Crystals of bakhchisaraitsevite in hydrothermal assemblage with colorless bobierrite on dolomite from a cavity in a deformed vein of dolomite carbonatite. Photographed by Nataly A. Pekova, Fersman Mineralogical Museum, Moscow, Russia. ...
FIGURES | View All (4)
Journal Article
Journal: Geology
Published: 13 November 2019
Geology (2020) 48 (1): 92–96.
... bobierrite and baricite; Egger et al., 2015 ; Dijkstra et al., 2016 ; Fig. 4 ). These calculations show that for all conditions except those associated with alkaline pH and very high marine [Ca 2+ ], the contemporaneous precipitation of greenalite and Ca-phosphate occurred despite significant vivianite...
FIGURES | View All (4)