1926-1929 (a selection)

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Alphabetical by the first author's surname 

ŁASZKIEWICZ, ANTONI
Mineralogical Institutes of the Warsaw University and Warsaw Polytechnic School, Warsaw, Poland
MINERALOGICAL STUDIES
Archiwum Mineralogiczne v. 3, p. 1-54, 1927

The paper includes the discussion of the following problems: crystal structure and symmetry of quartz, morphology of Polish quartz crystals and associated minerals (includes the crystals from Carpathians, Tatra Mts, Pieniny Mts, Kalusz, Lwow, Boryslaw, Swoszowice, Rudno, Grodziec, Boleslaw, Tarnowskie Gory, Wolyn, Kielce area: Wlodzimierz mine, Sloneczna Mt., Zagnansk, moreover hematite from Zagnansk, calcite, barite, azurite and cerussite from the Kielce area).

Barite from Zagnansk near Kielce, Poland	Cerusite from Jaworzno near Kielce, Poland

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ŁASZKIEWICZ, ANTONI
Mineralogical Institutes of the Warsaw University and Warsaw Polytechnic School, Warsaw, Poland
CRYSTALLOGRAPHIC STUDIES OF SYNGENITE FROM KALUSZ
Archiwum Mineralogiczne v. 3, p. 61-, 1927

Morphology of minute drusy crystals of syngenite, collected in 1925 from salt-bearing Miocene marls from Kalusz (presently western Ukraine) was characterised by means of the goniometric method.

Tabular syngenite from Kalusz.

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ŁASZKIEWICZ, ANTONI
Mineralogical Institutes of the Warsaw University and Warsaw Polytechnic School, Warsaw, Poland
MORPHOLOGY OF AZURITE FROM THE LYSOGORY AREA
Archiwum Mineralogiczne v. 3, p. 128-158, 1927

The paper presents the mode of occurrence, origin, crystallographic methods of studies and axial ratios, habits and tables of faces of the azurite from Swietokrzyskie Mts area in Central Poland. Chapter on malachite is also included.

 

Azurite from Miedziana Gora near Kielce, x ca. 75.

 

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ŁASZKIEWICZ, ANTONI
Mineralogical Institutes of the Warsaw University and Warsaw Polytechnic School, Warsaw, Poland
CONTRIBUTION TO THE MORPHOLOGY OF MINERALS FROM POLISH TATRA MTS
Archiwum Mineralogiczne v. 4, p. 124-132, 1928

Crystallographic characteristics (goniometric measurements of the face positions) are presented for crystals of barite, calcite and dolomite, collected by the author in Tatra Mts.

Barite crystal from the quarry of the Kórnik Foundation, valley "Na Capki", Tatra Mts.

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ŁASZKIEWICZ, ANTONI
Division of Mineralogy, Jagiellonian University, Cracow, Poland
BLOEDITE FROM KALUSZ
Archiwum Mineralogiczne v. 5, p. 79-96, 1929

Crystals of bloedite from druses in massive bloedite nodules from salt mine at Kalusz, collected at the gallery "Gruszecki", were characterised crystallographically and optically in details.

Bloedite crystal from Kalusz.

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WOYNO, TADEUSZ JERZY
Mineralogical Laboratory of the Warsaw Polytechnic School, Warszawa, Poland
CRYSTALLOGRAPHIC STUDIES OF BENZOYL DISULPHIDE (C₆H₅CO)₂S₂ 
Archiwum Mineralogiczne v. 2, p. 1-12, 1926

The crystals of benzoyl disulphide (C6H5CO)2S2 which have been the object of this research have been obtained at the Laboratory for Organic Chemistry at the Warsaw Polytechnic School by Prof. L. Szperl to whom I wish to express my thanks. The crystals belong to the prismatic (holohedral) class of the monoclinic system and do not in any way resemble the orthorhombic (nearly tetragonal) crystals of such a next chemical analogue as benzoyl peroxide. The general aspect of the most crystals reminds a regular dodecahedron, since the principal faces are c(001), b(010), o(111), (l1), the less important a(100), q(011) and m(110); s(201) are visible only during goniometric measurement as faint reflexes. The axial ratio is a : b : c = 0.7510 : l : 1.0236; = 107°10¹/₂'. Spheric co-ordinates of the faces are given in relation to (010) as pole-face and (100) as azimuth zero-point. The results of the measurement of the four principal faces have been represented graphically. The refractive index nm = 1.702 has been determined by the method of immersion and the Becke line; the extinction angle on (010) c : ng = +18° (in acute angle ) or a : np = +35.2°. The optic axial angle found by the authors method from the extinction angle on (l1) is 2V = 84°-85°, dispersion < very distinct. Plane of optic axes is (010), one of the axes is slighlhły inclined to the normal to (001) (8°5l' in air, 5°11' in crystal). This last determination combined with the extinction angle on (010) and with the angle [001] : (001) would give 2V = 80°45'. Interesting shapes were observed on a thin crystal edge obtained by crystallisation of melted benzoyl disulphide under the microscope.
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THUGUTT, STANISLAW JOZEF
Division of Mineralogy of the University of Warsaw
ON THE SOLUBILITY OF QUARTZ IN DISTILLED WATER 
Archiwum Mineralogiczne v. 4, p. 136-142, 1928

During the experimental run at temperature 215.5-221°C powdered quartz from Ural Mts dissolved in distilled water forming solution of the silica concentration ca. 0.06%.

Autoclave used in the Thugutt's experimental works.

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THUGUTT, STANISLAW JOZEF
Division of Mineralogy of the University of Warsaw
ON THE NATURE OF LUBLINITE AND ITS SOLUBILITY IN DISTILLED WATER 
Archiwum Mineralogiczne v. 5, p. 97-107, 1929

Lublinite, a fibrous natural variety of calcium carbonate formed in supergene environment, was proved to be identical with calcite. Its solubility is 0,0137 g per 100 ccm of distilled water at 230-233°C. Other features of the mineral were determined.
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