- 行业: Mining
 
- Number of terms: 33118
 
- Number of blossaries: 0
 
- Company Profile:
                        
 
  
                                                        The U.S. Bureau of Mines (USBM) was the primary United States Government agency conducting scientific research and disseminating information on the extraction, processing, use, and conservation of mineral resources.
Founded on May 16, 1910, through the Organic Act (Public Law 179), USBM's missions ...                             
                                                     
                        Minute wax-yellow to brown, trigonal pyramidal crystals, intergrown with synchysite, parisite, and bastnasite, from Narsarsuk, Greenland. From X-ray and optical data, the composition is deduced as Ca<sub>2</sub>(Ce,La)<sub>3</sub>(CO<sub>3</sub>)<sub>5</sub>F<sub>3</sub>. Also spelled roentgenite.    
    
    						Industry:Mining    
									Minute, colorless, monoclinic, lath-shaped crystals, presumably a hydrocarbon; found in chemawinite (variety of amber), Cedar Lake, MB, Canada.    
    
    						Industry:Mining    
									Mirror or prism attached to the eyepiece of a microscope, enabling an observer to sketch the object displayed.    
    
    						Industry:Mining    
									Miscellaneous pieces of steel, old and new, used in the bath for steel making, esp. in the open-hearth furnace.    
    
    						Industry:Mining    
									Misplacement of relatively fine material due to its adherence to a coarser fraction being settled and dragged out in mechanical classification or heavy-media separation.    
    
    						Industry:Mining    
									Missed hole resulting from the failure of a blasting cap to detonate owing to the breaking of a fuse or conductor or to some other similar cause.    
    
    						Industry:Mining