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E. T. Middleswarth

Bio: E. T. Middleswarth is an academic researcher from University of Pennsylvania. The author has an hindex of 1, co-authored 1 publications receiving 15 citations.

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Journal ArticleDOI
TL;DR: In this paper, it was shown that the kidney stones can be decomposed at temperatures below 40°C and at around 80°C if more rapid heating is employed, respectively.
Abstract: Struvite (NH4MgPO4·6H2O) is a mineral often found in urinary tracts and kidneys. Thermal decomposition using slow low heating shows that the 'kidney' stone can be decomposed at temperatures below 40°C. At this temperature both ammonia and water are evolved. If more rapid heating is employed the decomposition occurs at around 80°C. The implication of this work rests with the use of low slow heat for the decomposition of the kidney stones.

120 citations

Journal ArticleDOI
TL;DR: The crystal structure of Mg2P2O7 reported by Lukaszewicz has been refined by least squares analysis as discussed by the authors, using data of the hkl type with O( √ k/k/k)≤ 6.
Abstract: The crystal structure of Mg2P2O7 reported by Lukaszewicz has been refined by least squares analysis. Data of the hkl type with O ≤ k ≤ 6 have been used to obtain improved atomic parameters. The cen...

68 citations

Journal ArticleDOI
TL;DR: In this paper, solid-solid reactions in MgO V 2 O 5 mixtures of various stoichiometries were investigated and three compounds were obtained, viz., Mg3V2O8, Mg2V 2O7, and MgV2E6, and their space group and cell parameters were deduced from the X-ray powder diffraction pattern.

53 citations

Journal ArticleDOI
TL;DR: In this paper, data obtained by quenching, thermal, and high-temperature X-ray techniques are presented for the three binary systems CaF2-BeF2, MgF2−BeF 2, and LiF−MgF 2.
Abstract: Data obtained by quenching, thermal, and high-temperature X-ray techniques are presented for the three binary systems CaF2–BeF2, MgF2–BeF2, and LiF–MgF2. The systems CaF2–BeF2 and MgF2–BeF2 are presented as weakened models of the systems ZrO2–SiO2 and TiO2–SiO2, respectively. The compound CaBeF4 is a model of ZrSiO4 (zircon). New data obtained for the system LiF–MgF2 explain many discrepancies among the results of previous authors. Solid solution is almost complete between LiF and MgF2 at elevated temperatures, but a small gap occurs at the eutectic (735°C.) with extensive exsolution at lower temperatures.

42 citations

Journal ArticleDOI
TL;DR: In this article, the existence of the previously reported lithium ortho-, pyro-, and metaphosphate compounds was confirmed and a rapid, reversible inversion took place in Li/sub 4/P/ sub 2/O/sub 7/ at 630 deg C.
Abstract: As a preliminary to the investigation of the ternary systems Li/sub 2/O- B/sub 2/O/sub 3/-P/sub 2/O/sub 5/ and Li/sub 2/O-SiC/sub 2/-P/sub 2/O/sub 5/, the existence of the previously reported lithium ortho-, pyro-, and metaphosphate compounds was confirmed. A rapid, reversible inversion takes place in Li/sub 4/P/ sub 2/O/sub 7/ at 630 deg C. New data on the melting points, optical properties, and x-ray diffraction patterns of each of the compounds were obtained. (auth)

37 citations