biaxial
71pleochroism — /plee ok roh iz euhm/, n. the property of certain crystals of exhibiting different colors when viewed from different directions under transmitted light. Cf. dichroism (def. 1), trichroism. [1855 60; PLEOCHRO(IC) + ISM] * * * ▪ optics (from Greek …
72History of Physics — History of Physics † Catholic Encyclopedia ► History of Physics The subject will be treated under the following heads: I. A Glance at Ancient Physics; II. Science and Early Christian Scholars; III. A Glance at Arabian Physics; IV.… …
73Conoscopic interference pattern — This page is about the geology/optical mineralogy term. For general information about interference, see Interference (wave propagation) or Interference patterns. A conoscopic interference pattern or interference figure is the best way to… …
74Devilline — General Category Sulfate minerals Chemical formula CaCu4(SO4)2(OH)6·3(H2O) Strunz classification 07.DD.30 …
75Malayaite — General Category Silicate mineral Chemical formula CaSnO[SiO4] Crystal symmetry Monoclinic prismatic (2/m) Unit cell a = 7.15 Å, b = 8.90 Å, c …
76Marthozite — crystals in a vug, from Katanga (size: 6.2 x 5.3 x 4.0 cm) General Category Mineral …
77Mendipite — from the Torr Works Quarry (Merehead Quarry), Cranmore, Somerset, England. Specimen size 2 cm General Category Halides …
78Minyulite — (white) and sincosite (green), from Ross Hannibal Mine, Lead District, South Dakota, USA (size: 7.1 x 5.4 x 2.7 cm) General Category …
79Olympus E-5 — Type Digital single lens reflex Sensor Four Thirds 17.3 mm x 13.0 mm Live MOS Maximum resolution 4032 x 3024 pixels (12.3 megapixels) Lens Interchangeable (Four Thirds System) …
80recken — strecken; ausstrecken; dehnen; rekeln * * * re|cken [ rɛkn̩] <tr.; hat: [sich] gerade , auf , hochrichten, in die Höhe, irgendwohin strecken, dehnen: den Kopf [in die Höhe] recken, um etwas besser zu sehen; <auch + sich> ich reckte und… …
