Incommensurate phase of potassium guaninate monohydrate is the first example of a modulation in purine derivatives and of a high-pressure incommensurate crystal structure to be solved for an organic compound.

Tetragonal YxOs4B4 (x = 1.161) is an incommensurate composite of columns of Y atoms in a three-dimensional Os4B4 framework. The structure was refined using the superspace approach.

YxOs4B4 (x = 1.161) crystallizes as a tetragonal incommensurate composite of columns of Y atoms extending along [001] in an Os4B4 framework. The structure was refined using the superspace approach. The basic structure of the Y subsystem can be idealized as having I4/mmm symmetry, with a crystallographically unique Y atom located on the 4/mmm position. The actual superspace symmetry is P42/nmc(00σ3)s0s0. The Y atoms feature only subtle positional modulation in the [001] direction. The Os4B4 subsystem [P42/ncm(00σ3)00ss superspace symmetry] is built of columns of edge-sharing Os4 tetrahedra extending along [001] and B2 dumbbells. The Os4 tetrahedra feature pronounced positional modulation with a distinct variation of the Os—Os bond lengths. Modulation of the B2 dumbbells is best described as a rotation about the [001] axis.

The crystal structure of the incommensurate modulated phase of potassium guaninate monohydrate has been solved on the basis of high-pressure single-crystal X-ray diffraction data. The modulated structure was described as a `mosaic' sequence of three different local configurations of two neighbouring guaninate rings. In contrast to known examples of incommensurate modulated organic compounds, the modulation functions of all atoms are discontinuous. This is the first example of the experimental detection of an incommensurate modulated crystal structure that can be modelled using the special `soliton mode' modulation function proposed by Aramburu et al. [(1995), J. Phys. Condens. Matter, 7, 6187–6196].

The incommensurately modulated structure of (2S,3S)-2-amino-3-hy­droxy-3-methyl-4-phen­oxy­butanoic acid dihydrate (C11H15NO4·2H2O or I·2H2O) is described in the (3+1)-dimensional superspace group P212121(0β0)000 (β = 0.357). The loss of the three-dimensional periodicity is ascribed to the occupational modulation of one positionally disordered solvent water mol­ecule, where the two positions are related by a small translation [ca 0.666 (9) Å] and ∼168 (5)° rotation about one of its O—H bonds, with an average 0.624 (3):0.376 (3) occupancy ratio. The occupational modulation of this mol­ecule arises due to the com­petition between the different hy­dro­gen-bonding motifs associated with each position. The structure can be very well refined in the average approximation (all satellite reflections disregarded) in the space group P212121, with the water mol­ecule refined as disordered over two positions in a 0.625 (16):0.375 (16) ratio. The refinement in the commensurate threefold supercell approximation in the space group P1121 is also of high quality, with the six corresponding water mol­ecules exhibiting three different occupancy ratios averaging 0.635:0.365.

Traditional X-ray methods are extensively applied to commercial cement samples in order to determine their physical and chemical properties. Powder patterns are routinely used to quantify the composition of these phase mixtures, but structure determination becomes difficult because of reflection overlapping caused by the high number of different crystal structures. The fast-growing 3D electron diffraction technique and its related automated acquisition protocols arise as a potentially very interesting tool for the cement industry, since they enable the fast and systematic acquisition of diffraction data from individual particles. In this context, electron diffraction has been used in the investigation of the different crystalline phases present in various commercial clinkers for cement. Automated data collection procedures and subsequent data processing have enabled the structural characterization of the different crystal structures from which the α'H polymorph of Ca2SiO4 (belite) exhibited satellite reflections. Its average crystal structure has been known since 1971 and satellite reflections have been reported previously, yet the modulation was never fully described by means of the superspace formalism. Here, the incommensurately modulated structure is solved and refined using harmonic and crenel functions in the superspace group Pnma(α00)0ss, showing the potential of 3D electron diffraction for systematic crystallographic characterizations of cement. A full description of the different belite polymorphs is provided considering this modulated structure.

A few real case examples are presented on how to report magnetic structures, with precise step-by-step explanations, following the guidelines of the IUCr Commission on Magnetic Structures [Perez-Mato et al. (2024). Acta Cryst. B80, 219–234]. Four examples have been chosen, illustrating different types of single-k magnetic orders, from the basic case to more complex ones, including odd-harmonics, and one multi-k order. In addition to acquainting researchers with the process of communicating commensurate magnetic structures, these examples also aim to clarify important concepts, which are used throughout the guidelines, such as the transformation to a standard setting of a magnetic space group.

Preparatory meeting highlights battered carriageway stretch, absence of service roads and shoulder drains and delayed execution of new bridge at Kulur

Since 95% of polished diamonds are exported, global factors always affect the sale of the precious stones, said experts from Surat

To make matters worse, a sizeable number of labourers from Odisha are employed in the Surat textile industry, said Ashish Gujarati, president of Pandesara Weavers' Association.

The famed textile industry of Surat is one of the pillars of Gujarat's industrial success story. What is less known about it is the unfortunate reality of rampant child employment and exploitation that prevails there. Shirish Khare reports.

Frontline health workers of Surat Municipal Corporation (SMC) were allegedly threatened with life and spat at by six persons including four women in Sanjaynagar locality on Saturday.

Appearing impatient to return to their native places, migrant workers pelted stones at police in Surat district of Gujarat on Monday, leaving nearly a dozen personnel injured, one of them an IPS officer, and also held protests elsewhere during the coronavirus-enforced lockdown, officials said.

Lockdown 3.0: Migrant workers clash with cops in Surat, over 100 detained

Diamond trade at Surat has come to a halt because of the lockdown. Many workers have also left.

Paris : G. Steinheil, 1891.

Many workers have moved to their homes, but those who are still in Surat are desperate to move out of Gujarat, as the number of corona positive cases is rapidly surging.

Meanwhile, member of the Bhartiya Rail Sangharsh Samiti Shan Khan has demanded for special trains from Surat to Rajasthan, Madhya Pradesh, Jharkhand, Bihar and Uttar Pradesh for stranded labourers.

Hundreds of migrant workers came onto the streets and clashed with the police at a village in Surat district of Gujarat today to demand that they either be sent back to their home states or allowed to...

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A viral message has been doing the rounds of social media stating that the city of Vadodara is enforcing a complete lockdown to curb the spread of COVID-19.

The motorcyclist, driving along a highway in Surat Thani, southern Thailand, is forced to pull off a quick manoeuvre to avoid slamming in to a pickup truck's tail end.

Demanding a return passage to their home states, hundreds of agitated migrant workers clashed with the police at Mora village in Gujarat's Surat district on Saturday, an official said. Over 40 workers were detained, after hundreds of them clashed with the police and pelted stones at police vehicles in Mora village near the industrial town of Hazira, the official said. Protesting workers demanded that the district administration arrange for their travel back to their hometowns in Uttar Pradesh, Bihar, Odisha, among others, he said. Most of these labourers worked in industrial units at Hazira and lived in Mora village, the official said, adding that the police had cordoned off the area and tightened security there.

Hundreds of migrant workers came onto the streets and clashed with the police at a village in Surat district of Gujarat on Saturday to demand that they either be sent back to their home states or allowed to resume work at local industrial units to earn money, police said. The police resorted to lathicharge and fired tear gas to disperse the mob. Over a 100 workers were detained in this connection, an official said. The incident took place at Mora village near industrial town of Hazira. "Over 100 workers were detained after they took to the streets, demanding that they either be sent back home or allowed to work at the industrial units they were employed at in Hazira and paid salaries," joint commissioner of police (Sector 2) D N Patel said. Protesting workers came out of their homes in the workers' colony at Mora village and started walking in a large group towards Hazira industrial area, he said. The migrants demanded that the district administration should arrange for ..

Odisha reported 34 new cases on Thursday, 30 of them migrant workers who had returned from Surat in Gujarat.

The uncertainties over their return to native states has left the temper of migrants frayed.

Contrary to the claims that the migrants are not being asked to pay train fares, the labourers were not just made to bear the cost of travel but also overcharged.

The lockdown order will be in effect from May 9, 6 PM in Kalol and 6 AM on Sunday in Gandhinagar.

Hundreds of migrant workers came onto the streets and clashed with the police at a village in Surat district of Gujarat today to demand that they either be sent back to their home states or allowed to...

'ಶಿವಾಜಿ ಸುರತ್ಕಲ್' ಒಂದು ಪಕ್ಕಾ ಸಸ್ಪೆನ್ಸ್ ಥಿಲ್ಲರ್ ಸಿನಿಮಾ. ಒಂದು ಸಸ್ಪೆನ್ಸ್ ಸಿನಿಮಾಗೆ ಬೇಕಾದ ಎಲ್ಲ ಅಂಶಗಳು ಸಿನಿಮಾದಲ್ಲಿದೆ. ಪ್ರೇಕ್ಷಕರಿಗೆ ಥ್ರಿಲ್ ನೀಡುವುದರ ಜೊತೆಗೆ ಸಿನಿಮಾದ ಭಾವುಕ ದೃಶ್ಯಗಳು ಮನಸ್ಸಿಗೆ ಹತ್ತಿರ ಆಗುತ್ತದೆ. ಕೆಲವು ಹಾರರ್ ಎನಿಸುವ ದೃಶ್ಯಗಳು ನೋಡುಗರಿಗೆ ಭಯ ಬೀಳಿಸುತ್ತದೆ.

NITK Surathkal

Surat Lignite

Vadodara-Surat section

Diamond trade has come to a halt because of the lockdown. Many workers have also left.

The police have arrested over 60 people and another 60 have been detained.

During investigation Sai accepted having physical relationships with eight of his female disciples.

Of the 2,000 employees in his factory, 100 met annual targets; 70 got cars, 30 cash up to Rs 3 lakh.

The incident took place in Mora village near the industrial town of Hazira.