Mined near Potosi, Bolivia Price:$41.95 This 2.7 inch specimen of natural vivianite is a vivianite crystal section with transparent areas and beautiful blue & green natural colors. See also a back-lit view of this natural specimen ofvivianite. Vivianite Crystals with Matrix This unique item is ...
In this study, crystals, wooden coffins, surrounding water and clay materials of several buried wooden coffins were subject to various analyses, and the crystals were identified to be vivianite by single crystal X‐ray diffraction, X‐ray fluorescence (XRF) and infrared (IR) spectroscopy. Spatial...
Crystal Habitsinclude radiating clusters of prismatic, acicular, or fiberous crystals. Also earthy and encrusting masses. Often lines the inside of fossil shells. Cleavageis perfect in one direction. Fractureis splintery. Hardnessis 1.5 - 2. ...
Crystal Habit Divergent, Concretionary, Earthy Cleavage Perfect, None, None Luster Vitreous - Pearly Color colorless, green, blue, dark green, dark bluish green Streak bluish white Class Monoclinic - Prismatic Fracture Sectile Hardness 1.5-2 ...
A nice crystal of vivianite, with a deep green color and well defined. Cristal de gran perfección de vivianita, de intenso color verde y muy definido. ParaCrawl Corpus Key words: Iron chlorosis, calcareous soils, olive tree, vivianite, ferrous phosphate. Palabras clave: Clorosis férrica...
The simplified crystal-chemical formula for metavivianite is Fe2+(Fe3+, Fe2+)2(PO4)2(OH,H2O)2·6H2O; the endmember formula is Fe2+Fe3+2(PO4)2(OH)2·6H2O, which is dimorphous with ferrostrunzite. 展开 关键词: metavivianite formula revision crystal chemistry Minas Gerais Brazil ...
Structure and crystal chemistry of vivianite-type compounds; crystal structures of erythrite and annabergite with a Moessbauer study of erythrite A two-step approach, first by iron-air fuel cell and then by adjusting pH, was developed to treat chemical polishing wastewater, aiming at resource reco...
Vivianite crystal aggregates were colorless when sampled but turned blue within a few hours under an optical microscope. The modal size of the crystal aggregates was approximately 0.05 mm in diameter. Their X-ray microdiffraction pattern was identical to that reported previously, and the elemental ...
· 8 H2O (3); successively they have been subject to structural refinement by means of single-crystal X-ray diffraction within monoclinic space group C2/m, with the following unit cell constants: a = 10.100(3), b = 13.494(3), c = 4.709(3) ; β = 104.24(4)° and V = 622.1(7)...
Capitelli F, Elaatmani M, Lalaoui MD, Piniella JF (2007) Crystal structure of a vivianite-type min- eral: Mg-rich erythrite, Co2.16Ni0.24Mg0.60)(AsO4)2·8H2O. Z Kristallogr 222: 676-679Capitelli, F.; Elaatmani, M.; Lalaoui, M. D.; Piniella, J. F.: Crystal structure of a...