Go toArchive
Browse byFacets
Bookbag ( 0 )
'Ludwigite' in keywords
Results  1 Item
Sorted by   
Section
Publication Year
1996 (1)
1Author    Anne Utzolino, Karsten BluhmRequires cookie*
 Title    Neue Einsichten zur Stabilisierung des Hulsit-Strukturtyps am Beispiel von Mnl,2MnIII( B 0 ,) 0 2 und Mn,lSrMnlll( B 0 ,) 0 , New Insights into the Stabilization of the Hulsite Structure During Crystal Structure Determination of M nII2M nIII(B 0 3)0-) and MnllSrM nIII(B 0 3) 0 2  
 Abstract    The compounds MnII2M nIII(B 0 3)02 (I) and MnnSrM nm(B0 3)0 2 (II) were prepared by using a B20 3 flux technique. Single crystals were investigated by X-ray diffraction. I showed ortho-rhombic symmetry, space group D2h -Pbam (No. 55), a = 926.0; b = 1241.5; c = 304.96pm ; Z = 4 and II monoclinic symmetry, space group C2h -P2/m (No. 10), a = 1107.5; b = 311.04; c = 542.93 pm, ß = 95,10(2)°; Z = 2. M n '^ M n '^ B O d O i is isotypic with the mineral Lud­ wigite while MnnSrM nm(B0 3)0 2 is isostructural with the mineral Hulsite. In the structure of M niI2M nlll(B 0 :,) 0 2 (I) all metal point positions showed octahedral oxygen coordination, one point position is occupied by M nu . The structure of M nll2Sr2M nlll2(B O 02O 4 (II) contains five octahedrally coordinated metal sites, three of them statistically occupied by Mn:+ or Mn '+ and Sr2+. The incorperation of S r + seems to be responsible for the Hulsite structure. Both structures contain isolated, trigonal planar B 0 3 units and oxygen atoms that are not coordinated to boron. 
  Reference    Z. Naturforsch. 51b, 1433—1438 (1996); eingegangen am 12. April 1996 
  Published    1996 
  Keywords    Manganese, Strontium Borate Oxide, Ludwigite, Hulsite 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/51/ZNB-1996-51b-1433.pdf 
 Identifier    ZNB-1996-51b-1433 
 Volume    51