The title com­pound, tetra­ethyl­ammonium tetra­thio­rhenate, [(C2H5)4N][ReS4], has, at room temperature, a disordered structure in the space group P63mc (Z = 2, α-phase). A phase transition to the monoclinic space group P21 (Z = 2, γ-phase) at 285 K leads to a pseudo-merohedral twin. The high deviation from the hexa­gonal metric causes split reflections. However, the different orientations could not be separated, but were integrated using a large integration box. Rapid cooling to 110–170 K produces a metastable β-phase (P63, Z = 18) in addition to the γ-phase. All crystals of the β-phase are contaminated with the γ-phase. Additionally, the crystals of the β-phase are merohedrally twinned. In contrast to the α-phase, the β- and γ-phases do not show disorder.

A Landau theory for the wurtzite-based heterovalent ternary semiconductor ZnSnN2 is developed and a first-order reconstructive phase transition is proposed as the cause of observed crystal structure disorder. The model infers that the phase transition is paraelectric to antiferroelectric.

To enable public transit agencies to engage in more rigorous and effective safety planning, their safety planning records should not be admissible as evidence in civil litigation, says a new report from the National Academies of Sciences, Engineering, and Medicine.

A new report from the National Academies of Sciences, Engineering, and Medicine examines evidence on whether providing permanent supportive housing (PSH) – a combination of stable housing and supportive services -- to individuals who are experiencing homelessness improves their health.

Density in the urban environment can encompass a multitude of factors such as population or dwelling density or the density of green areas. A new study surveyed professionals regarding how decisions on urban density are made, and has revealed that many feel that developers make most of these decisions, but that local authority planners should have more influence.

A new tool for mapping the sensitivity of seafloor habitats to fishing activities has been developed. Researchers combined data on the resistance of habitats to damage from fishing practices, and how quickly they are able to recover, to produce a widely applicable tool that can be easily understood by stakeholders and used for different locations.

A new combination of three models has explored the future dynamics of European livestock distribution. The results indicate that, without environmental policy, livestock density will increase both inside and outside current livestock hotspots. This will also occur to a certain degree with regulation, but the risk of negative impacts will be less likely.

Agricultural intensification can significantly affect soil ecosystems and the services they provide, new research suggests. Examining soils across Europe, the study demonstrates that high intensity arable land uses have lower diversity and biomass of soil organisms than lower intensity arable or permanent grassland, affecting the carbon and nitrogen cycles in the environment.

The largest ice sheet in the world, the east Antarctic ice sheet, may succumb to climate change faster than thought, according to recent research. Warming ocean currents, triggered by shifting wind patterns, could accelerate melting of the ice sheet, leading to a rise in sea levels, say the researchers.

The increased density of forests has been responsible for substantially increasing sequestered carbon in Europe and North America over the past 20 years, according to a recent study. The researchers suggest that managing forests for increased density offers one means of increasing carbon stocks.

A new tool has been developed to map the sensitivity of seabirds to offshore wind farm development. The Seabird Mapping and Sensitivity Tool (SeaMaST), currently for use in English waters, combines information on the sensitivity of seabird species to wind turbines with data on the birds’ distribution. It provides maps that can be used for both the offshore wind farm industry and marine spatial planning.

Human water consumption has increased the frequency and intensity of periods of abnormally low flow in streams, new research suggests. The frequency of these events increased by 30% globally, largely due to use of water for irrigation, the researchers conclude.

Transport infrastructure and urban sprawl are increasingly dividing up landscapes in Europe, threatening wildlife. A new report has quantified landscape fragmentation across 28 European countries. To prevent further negative environmental impacts, it recommends protecting unfragmented areas, monitoring fragmentation and applying fragmentation analysis in planning.

A new study exploring the sensitivity of grassland and forest plants to decreasing habitat size and isolation in north-central Europe concludes that an irreversible shift in the most dominant plant species may already be underway in forests and grassland, where forests are more vulnerable than grasslands.

This study assessed the effects of herbicides on non-target plants in Denmark and Canada. The findings showed that some plants are more sensitive to herbicides in the reproductive stages of their life cycle and can experience delays in flowering and reduced seed production. The authors say future ecological assessments should consider reproductive outcomes.

LYNCHBURG —Administrative oversight of maintenance and land use services for the counties of Buckingham, Charlotte, Cumberland, and Prince Edward has started to relocate from the old Dillwyn Residency site on Rosney Road in the Town of Dillwyn to the newly constructed Farmville site on Commerce Road in the Town of Farmville.

Despite its aim to ease a housing crunch and kill congestion, California's Senate Bill 827 has its detractors.

The transit of Venus is so rare that it's visible only once every century or so, and will next to be seen by our descendents in 2117.

A NASA sun-watching spacecraft will have an unbeatable view of June's historic Venus transit, but some of the probe's scientists are taking measures to get a gr

Observations of next month's historic Venus transit may eventually help astronomers spot and study alien planets circling faraway stars, one prominent researche

The dramatic celestial event will be visible from all seven continents, and it's a must-see for skywatchers; Venus won't trek across the solar disk again for 10

A rare opportunity to see the planet Venus cross in front of the face of the sun is coming up next week. On June 5 to 6, Venus will "transit" the sun for the l

Much of the world will be able to witness a rare skywatching event on June 5, as Venus crosses the face of the sun in a spectacle that will not be visible again

When Venus interposes itself directly between Earth and the sun for the last time in more than a century, national parks across America will be prepared to obse

On June 5, Venus will cross the face of the sun. If you live in North America, Europe, Asia or eastern Africa, you'll be able to witness this historic celestial

It's something no one alive today will likely ever see again: The planet Venus crossing the sun — a small, black dot moving across the fiery face of our neare

Photographing the historic Venus transit of the sun is special enough on its own, but one space photographer managed to get NASA's Hubble Space Telescope in the

The holidays have plenty of hustle and bustle, and it can overwhelm children on the autism spectrum. Sensitive Santas can help bring seasonal joy.

Officials will offer money to owners of environmentally sensitive farmland if they idle it in a conservation program instead of growing crops.

Catering to young Londoners struggling to enter the city's real estate market, the YMCA's Y:Cube Housing offers a green prefab-based step toward independence.

Several German cities are planning to fight air pollution by eliminating fares on public transport.

If the Motes project is successful, it will make remote sensing as easy as using an iPhone. They are currently raising funds on Indiegogo,

Elon Musk wasn't the first with a futuristic idea. The transportation industry has seen a mixed bag of game-changing technologies and utter failures.

Elon Musk wasn't the first to come up with a visionary transportation scheme.

The nonprofit Gearing Up gives women in recovery a chance to get outside, build self-esteem and bond with one another.

Mild-mannered European travel guru Rick Steves never fails to surprise.

Traffic driving you crazy? Let MNN get you on track to a more astute commute with these carpooling and public transit tips.

mexico city public transit

Public transit has long been undervalued as a mobility option. Thanks to new technologies and new ways of living, that's changing.

A few ocean liners have been working to cut back on their pollution. But you're still free to be a glutton at the buffet.

Transit use is going up as people prefer using their smartphones to driving.

The end of summer and beginning of autumn mean warm days and cold nights; bring one of these sweaters along to keep comfy.

From an underground funicular to ice buses, there are unique ways around the world to get from one end of a city to another.

The Rhode Island-sized nation of Luxembourg is the first country to completely nix transit fares in an effort to combat traffic congestion.

Even if self-driving cars could replace mass transit, it would be a very bad thing.

It has always been about being noticed. People dress well or do something bizarre in order to be noticed or make a statement. To get ahead in life or business one needs to be at the top, first in line.

Velvet is back and it's better than ever

Creative Health Solutions LLC is pleased to announce the launch of a brand-new program called Transition to Independence: Unlocking Special Abilities.