Sulphatic cancrinite from Colorado

Thermal expansion of cancrinite

I n t r o d u c t i o n THE structures of the cancrinite-group minerals are character ized by parallel s ix-membered rings consisting of alternating A104 and SiO4 tetrahedra. The hexagonal symmetry is the result of the stacking of such six-membered rings in an AB... sequence. This stacking leads to large continuous channels that are formed by twelve-membered rings of alternating A1Oa and SiO4 t...

[university of Colorado at Colorado Springs,colorado Springs, Colorado]

The high-pressure behavior of balliranoite: a cancrinite-group mineral

The high-pressure elastic behavior and structure evolution of a natural balliranoite, i.e. a mineral isotypic with cancrinite belonging to the davyne subgroup, (Na4:47Ca2:86K0:11)(Si5:96Al6:04O24)Cl2:03(CO3)0:78(SO4)0:33, a1⁄4 12.680(1) Å, c 1⁄4 5.3141(5) Å and V 1⁄4 739.9(1) Å3, S.G. P63, have been studied by means of in-situ single-crystal X-ray diffraction with a diamond anvil cell, up to 6....

Selenium impacts on razorback sucker, Colorado: Colorado River III. Larvae.

Razorback sucker (Xyrauchen texanus) larvae from adults exposed to selenium at three sites near Grand Junction, Colorado, for 9 months were used in a 30-day waterborne and dietary selenium study. Selenium concentrations in water averaged <1.6 microg/L from 24-Road, 0.9 microg/L from Horsethief, 5.5 microg/L from Adobe Creek, and 10.7 microg/L from the North Pond. Selenium in dietary items avera...

Maternal Deaths From Suicide and Overdose in Colorado, 2004-2012.

OBJECTIVE To ascertain demographic and clinical characteristics of maternal deaths from self-harm (accidental overdose or suicide) to identify opportunities for prevention. METHODS We report a case series of pregnancy-associated deaths resulting from self-harm in the state of Colorado between 2004 and 2012. Self-harm deaths were identified from several sources, including death certificates. B...