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Augelite from a New Locality in Bolivia

Published online by Cambridge University Press:  14 March 2018

L. J. Spencer
L. J. Spencer*
Affiliation:
Mineral Department of the British Museum
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Extract

In a recent number of this Magazine (vol XI, 1895, p. 16) augelite was shown to be a definite mineral species, having the chemical composition AlPO4.Al(OH)3, and erystallising in the monosymme{ric system. Owing to its rarity, or perhaps to its similarity in appearance to barytes, it has previously only been described three times in mineralogieal literature, and has been f, mnd at only two localities, namely, Westans in Sweden and Machacamarca in Bolivia. It is therefore of interest to be able to record the mineral from a new locality.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 12 , Issue 54 , June 1898 , pp. 1 - 4
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1898

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References

1 Des Cloizeaux (Manuel de Min. II, 1893, p. 454) examined cleavage flakes of the Swedish mb eral; he giws a cleavage angle and some of the optical characters, but not enough to determine the system of crystallisation.

2 Tatasi and Portugalete are mining villages which are connected ly a level driven through the intervening mountain. H. Reck has described the Portugalete mines, Berg.-und Hüttenm. Zeitung, 1884, p. 125.

1 Sitz,-ber, nicderrhein. Ges. Bonn, 1879, XXXVI, p. 80.

1 The acute bisectrix makes an angle of 11½° with the normal to c(001). In the previous paper (loc. cit. p. 20) there is a slight ambiguity as to the position of the acute biseetrix. It lies "in the acute angle fi," when fl is taken as defiled by lVlaskelyne (Crystallography, 1895, p. 436), but according to other authors this should read "in the obtuse axial angle ft." According to Dana's notation (System of Mineralog.y, 6th ed. 1892, p. xxxvi) it is Bxa A c = + 34°

1 This is about 200 kilometers N.N.E. of the new locality now described for an gelite.

2 Zeits. deutsch. geol. Ges. 1892, XLIV, 531; 1897, XLIX, 51; see Min. Mag. X, 261, aud this vol. pp. 46, 7.

The following corrections have been issued for this article:

Errata

Errata