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European Journal of Mineralogy
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#1Wentao CaoH-Index: 4
#2Jane A. GilottiH-Index: 23
Last. Hans-Joachim MassonneH-Index: 33
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#1Anthony R. Kampf (AMNH: American Museum of Natural History)
#1Anthony R. KampfH-Index: 19
Last. Mark N. Feinglos (Duke University)H-Index: 48
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Abstract. Niasite (IMA2019-105) and johanngeorgenstadtite (IMA2019-122) are Ni 4.5 2 + ( AsO4 ) 3 dimorphs from Johanngeorgenstadt, Saxony, Germany. The two new minerals occur in association with one another and with aerugite, bunsenite, quartz, rooseveltite and xanthiosite. This mineral assemblage is apparently secondary in origin and most likely formed from the breakdown of primary nickeline under dry (low relative humidity) and oxidizing (high oxygen fugacity) conditions. Both minerals are fo...
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#1Ritsuro MiyawakiH-Index: 16
Last. Stuart J. Mills (Museum Victoria)H-Index: 18
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#1Cristiano FerrarisH-Index: 13
#2Isabella Pignatelli (University of Lorraine)H-Index: 12
Last. Fengxia WeiH-Index: 20
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Abstract. Laurentthomasite, ideally Mg2 K( Be2 Al) Si12 O30 , is a new milarite-group member found within quartz-syenite pegmatites from the Ihorombe region, Fianarantsoa Province, Madagascar. It occurs as euhedral {0001} hexagonal crystals, maximum 15 mm large and 5 mm thick. The crystals show a very strong dichroism with cobalt blue and green-yellow colours when observed along [0001] and [1000], respectively. The mineral is transparent, uniaxial ( + ) and its lustre is vitreous. The hardness i...
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#1Wendi LiuH-Index: 2
#2Yan YangH-Index: 5
Last. Qunke XiaH-Index: 22
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Abstract. It has long been known that hydrogen impurities can be incorporated in the structure of nominally anhydrous minerals (NAMs) and substantially influence their physical properties. One of the geologically most prominent NAMs is feldspar. The hydrogen concentration in NAMs is usually expressed in parts per million of water by weight (ppm H2O wt.) In this paper, we use the term “hydrogen” for uniformity, except when we use “water” for describing its amount expressed as parts per million of...
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#1Alexandra M. Plumhoff (Schiller International University)
#2Jakub PlášilH-Index: 18
Last. Juraj Majzlan (Schiller International University)H-Index: 28
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Abstract. The phases pushcharovskite, geminite and liroconite were synthesized or acquired and characterized by powder X-ray diffraction, infrared spectroscopy, electron microprobe analysis, thermogravimetric analysis and optical emission spectrometry, as needed. Their thermodynamic properties were determined by a combination of acid-solution calorimetry and relaxation calorimetry, resulting in Gibbs free energies of formation ( ΔfGo , all values in kilojoules per mole) of - 1036.4 ± 3.8 (pushch...
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Crystal structure
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