NO. 5 HEXAHEDRITES — HENDERSON 7 



published an analysis by F. C. Hawley which reported 6.96 percent 

 Ni. Again in 1950 Nininger classified this iron as a brecciated 

 octahedrite. Goldberg and others (1951) published two nickel 

 determinations, 6.97 and 6.85 percent. Thus, three analyses report 

 values in excess of those for a hexahedrite. 



2. Dorofeevka, U.S.S.R. Illustrations of this iron published by 

 Zavaritsky (1954) show both narrow kamacite lamellae and plessite 

 areas. In the text Zavaritsky mentions that this iron resembles a 

 nickel-rich ataxite. 



3. Granado, Ariz. Nininger and Nininger (1950) reported this 

 38-gram iron as a hexahedrite, but H. H. Nininger now regards it as a 

 piece of Canyon Diablo (personal communications). 



4. Lake Murray, Carter County, Okla. Classified as a coarse 

 octahedrite. This specimen, weighing 272.7 kg., was found about 

 1932 but not excavated and recovered until 1952. La Paz con- 

 sidered it an intermediate member between the hexahedrites and 

 octahedrites and proposed the term "hexaoctahedrite." Plate 1 

 shows a portion of a cut through the Lake Murray meteorite. In 

 several areas wide kamacite bands are arranged in an octahedral 

 pattern. The octahedral structure in other parts of this section is 

 disrupted by the growth of large skeletons of schreibersite inclusions, 

 some measuring more than 6 cm. in length and 4 cm. in width. 



5. New Mexico. This 130-gram specimen was found in 1923 

 at approximately 34°3r N. and 107° W. Nininger and Nininger 

 (1950) listed it as a hexahedrite and said it had been fashioned into 

 an ax. Obviously man had something to do with this iron. Since 

 the Sandia Mountains, N. Mex., iron has kamacite grains of about 

 this size and shape, H. H. Nininger now regards the New Mexico 

 specimen as a man-worked fragment of the Sandia Mountains iron 

 (personal communications). 



6. Sulechow, Poland. Although typed as a hexahedrite by 

 Pokrzywnicki (1959), the Ni value in analysis is within the range of 

 the octahedrites. 



7. Western Arkansas. Merrill (1927) reported an analysis with 

 a nickel value within the range of the hexahedrites but did not 

 classify the meteorite. Merrill's published analysis is inconsistent 

 with the structure of this specimen. Also the analysis of the mete- 

 orite with which Merrill compared the analysis of the Western 

 Arkansas was proved to be inaccurate. The Western Arkansas, 

 therefore, is definitely not a hexahedrite. 



