schaller: mineralogical notes 355 



thin tabular parallel to a {100}. Formula: BioOs.MoOs. Inyoite 

 and Meyerhofferite, Two New Calcium Borates from Death Valley, 

 Inyo County, California, belong to the colemanite series. Inyoite 

 (named after the locality) occurs in rhombic-shaped monoclinic 

 crystals ia:b:c = 0.9408 : 1 : 0.'6665, ^ = 62°37'). The formula 

 is 2Ca0.3B203.13H20. The inyoite crystals alter to aggregates 

 of prismatic crystals of meyerhofferite (named after W. Meyer- 

 hoffer, who made the mineral artificially), which is triclinic 

 {a :b : c = 0.7923 : 1 : 0.7750, a = 89°32', /3 = 78°19', y = 

 86°52') and which has the formula 2CaO.3B2O3.7H2O. Lucinite 

 a New Mineral: A Dimorphous Form of Variscite, occurs with 

 variscite at Lucin, Utah, in minute octahedral orthorhombic 

 crystals. 



Lucinite, a :b :c = 0.8729 : 1 : 0.9788 

 Variscite, a:b :c = 0.8944 : 1 : 1.0919 

 Analyses show the two minerals to have the same composition. 

 The Crystallography of Variscite includes a redetermination of the 

 axial ratio (just given) and an extension of the crystal forms. 

 Schneebergite: A study of original material from Schneeberg^ 

 Austrian Tyrol, loaned by Dr. Koechlin of Vienna, has shown it 

 to have the formula 4CaO.Sb203.Sb205, the antimony being pres- 

 ent in two states of oxidation. Schneebergite is distinct from all 

 other calcium antimony compounds. Romeine from Italy has 

 the formula 5Ca0.3Sb205. The so-called atopite from Brazil 

 is not that mineral but romeine. The Natural Antimonites and 

 Antimonates are briefly classified. Velardehite, a New Mernber 

 of the Melilite Group, is tetragonal, and has the composition 

 2CaO.Al2O3.SiO2. The so-called gehlenite from Velardena„ 

 Mexico, is velardenite. The Melilite Group of minerals can be- 

 interpreted as mixtures of velardeiiite, sarcolite (SCaO.ALOa^ 

 3Si02), and ackermanite (4Mg0.8Ca0.9Si02). The Crystallog- 

 raphy of Thaumasite describes hexagonal crystals, c = 1.09. The 

 Chrysocolla Group discusses the minerals commonly called chryso- 

 colla which are shown to belong to several distinct crystallized 

 species. The Chemical Composition of Tremolite is considered 

 from the chemical side and the probable formula derived for the 

 mineral is H20.2Ca0.5Mg0.8Si02. The Probable Identity of Ma- 

 riposite and Alurgite is considered, and The Amblygonite Group 



