46 
1896. Scheerer’s analysis of the soclium-bearing mineral from 
Norway quoted by Dana under Jarosite. He gave the formula for 
the latter as K 2 0.3Fe a 0 3 .4S0 3 .6H 2 0.— Sys. Min., VI Edit., 975. 
1899. Headden’s description of the sodium mineral from 
South Dakota quoted by Dana under Jarosite. — 1st App. to Sys. 
Min., 37. 
1901. II. W. Turner recorded the occurrence at Soda Springs 
Valley, Nevada, of a large quantity of a golden brown .micaceous 
mineral, which Dr. Hillebrand reported was the practically pure 
sodium salt corresponding to Jarosite. — Amer. Jour. Sci. 13, 345. 
1902. Hillebrand and Penfield described, with analysis and 
complete crystallographic details, the yellow rliombohedral mineral 
from Soda Springs Valley, Nevada, collected by Turner. The 
analysis was that of an almost pure sodium species corresponding to 
Jarosite. This they recognised as being thereby distinct from Jaro- 
site, and gave it the new specific name Natro jarosite, assigning the 
mineral to the Alunite Group. The formula given is 
Na 2 [Fe(0H) 2 ] 6 (S0 4 ) 4 , which may be written in the same form as 
that given by Dana for Jarosite. They also described an identical 
mineral from Cook’s Peak, New Mexico. — Amer. Jour. Sci., 14, 
211 . 
1903. L. J. Spencer in his “Third List of new Mineral Names” 
gave Hillebrand and Penfi eld’s “Natro jarosite.” — Miner. Mag., 13, 
373. 
1910. “Pastreite” from France shown to be normal Jarosite, 
by Azema. — Bull. Soc. Franc. Min., 33, 130. 
1911. W. T. Schaller discussed the rliombohedral Alunite- 
Beudantite Group, including therein Jarosite and Natro jarosite.- 
Amer. Jour. Sci., 32, 359. 
From the above brief notes it is plain that Natro jarosite was 
first discovered in 1838 in material from Modum, Norway, but that 
it was at that time included in the species Jarosite. It was not till 
1902 that its independent specific character was recognised and the 
present name given to it. 
OCCURRENCE. 
Natrojarosite has previously been recorded from the following 
four localities: — 
Modum, Nor-way. 
Lawrence Co., South Dakota. 
Soda Springs Valley, Nevada. 
Cook’s Peak, New Mexico. 
A search has failed to reveal any record of its discovery m 
Australia. To the locality list given, however, must now be added 
as a new locality, Kundip, in the Phillips River Goldfield of this 
State. 
