Reproducibility/naacl22_wikitext15M · Datasets at Hugging Face

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= = = Football League Two play @-@ offs = = =


= = Transfers = =


= = = In = = =

Brackets around club names denote the player 's contract with that club had expired before he joined York .

= = = Out = = =

Brackets around club names denote the player joined that club after his York contract expired .

= = = Loan in = = =


= = = Loan out = = =


= = Appearances and goals = =

Source :
Numbers in parentheses denote appearances as substitute .
Players with names struck through and marked left the club during the playing season .
Players with names in italics and marked * were on loan from another club for the whole of their season with York .
Players listed with no appearances have been in the matchday squad but only as unused substitutes .
Key to positions : GK – Goalkeeper ; DF – Defender ; MF – Midfielder ; FW – Forward


= Antimony =

Antimony is a chemical element with symbol Sb ( from Latin : stibium ) and atomic number 51 . A lustrous gray metalloid , it is found in nature mainly as the sulfide mineral stibnite ( Sb2S3 ) . Antimony compounds have been known since ancient times and were used for cosmetics ; metallic antimony was also known , but it was erroneously identified as lead upon its discovery . In the West , it was first isolated by Vannoccio Biringuccio and described in 1540 , although in primitive cultures its powder has been used to cure eye ailments , as also for eye shadow , since time immemorial , and is often referred to by its Arabic name , kohl .
For some time , China has been the largest producer of antimony and its compounds , with most production coming from the <unk> Mine in Hunan . The industrial methods to produce antimony are roasting and reduction using carbon or direct reduction of stibnite with iron .
The largest applications for metallic antimony are as alloying material for lead and tin and for lead antimony plates in lead – acid batteries . Alloying lead and tin with antimony improves the properties of the alloys which are used in solders , bullets and plain bearings . Antimony compounds are prominent additives for chlorine and bromine @-@ containing fire retardants found in many commercial and domestic products . An emerging application is the use of antimony in microelectronics .

= = Characteristics = =


= = = Properties = = =

Antimony is in the nitrogen group ( group 15 ) and has an electronegativity of 2 @.@ 05 . As expected from periodic trends , it is more electronegative than tin or bismuth , and less electronegative than tellurium or arsenic . Antimony is stable in air at room temperature , but reacts with oxygen if heated , to form antimony trioxide , Sb2O3 .
Antimony is a silvery , lustrous gray metalloid that has a Mohs scale hardness of 3 . Thus pure antimony is too soft to make hard objects ; coins made of antimony were issued in China 's Guizhou province in 1931 , but because of their rapid wear , their minting was discontinued . Antimony is resistant to attack by acids .
Four allotropes of antimony are known : a stable metallic form and three metastable forms ( explosive , black and yellow ) . Elemental antimony is a brittle , silver @-@ white shiny metalloid . When slowly cooled , molten antimony crystallizes in a trigonal cell , isomorphic with the gray allotrope of arsenic . A rare explosive form of antimony can be formed from the electrolysis of antimony trichloride . When scratched with a sharp implement , an exothermic reaction occurs and white fumes are given off as metallic antimony is formed ; when rubbed with a pestle in a mortar , a strong detonation occurs . Black antimony is formed upon rapid cooling of vapor derived from metallic antimony . It has the same crystal structure as red phosphorus and black arsenic , it oxidizes in air and may ignite spontaneously . At 100 ° C , it gradually transforms into the stable form . The yellow allotrope of antimony is the most unstable . It has only been generated by oxidation of stibine ( SbH3 ) at − 90 ° C. Above this temperature and in ambient light , this metastable allotrope transforms into the more stable black allotrope .
Elemental antimony adopts a layered structure ( space group <unk> No. 166 ) in which layers consist of fused ruffled six @-@ membered rings . The nearest and next @-@ nearest neighbors form an irregular octahedral complex , with the three atoms in the same double layer being slightly closer than the three atoms in the next . This relatively close packing leads to a high density of 6 @.@ 697 g / cm3 , but the weak bonding between the layers leads to the low hardness and brittleness of antimony .

= = = Isotopes = = =

Antimony has two stable isotopes : <unk> with a natural abundance of 57 @.@ 36 % and <unk> with a natural abundance of 42 @.@ 64 % . It also has 35 radioisotopes , of which the longest @-@ lived is <unk> with a half @-@ life of 2 @.@ 75 years . In addition , 29 metastable states have been characterized . The most stable of these is <unk> with a half @-@ life of 5 @.@ 76 days . Isotopes that are lighter than the stable <unk> tend to decay by β + decay , and those that are heavier tend to decay by β − decay , with some exceptions .

= = = Occurrence = = =

The abundance of antimony in the Earth 's crust is estimated at 0 @.@ 2 to 0 @.@ 5 parts per million , comparable to thallium at 0 @.@ 5 parts per million and silver at 0 @.@ 07 ppm . Even though this element is not abundant , it is found in over 100 mineral species . Antimony is sometimes found natively ( e.g. on Antimony Peak ) , but more frequently it is found in the sulfide stibnite ( Sb2S3 ) which is the predominant ore mineral .

= = Compounds = =

Antimony compounds are often classified according to their oxidation state : Sb ( III ) and Sb ( V ) . The + 5 oxidation state is more stable .

= = = Oxides and hydroxides = = =

Antimony trioxide ( Sb
4O
6 ) is formed when antimony is burnt in air . In the gas phase , this compound exists as Sb
4O
6 , but it polymerizes upon condensing . Antimony pentoxide ( Sb
4O
10 ) can only be formed by oxidation by concentrated nitric acid . Antimony also forms a mixed @-@ valence oxide , antimony tetroxide ( Sb
2O
4 ) , which features both Sb ( III ) and Sb ( V ) . Unlike oxides of phosphorus and arsenic , these various oxides are amphoteric , do not form well @-@ defined <unk> and react with acids to form antimony salts .
<unk> acid Sb ( OH )
3 is unknown , but the conjugate base sodium <unk> ( [ Na
<unk>
3 ]
4 ) forms upon fusing sodium oxide and Sb
4O
6 . Transition metal <unk> are also known . <unk> acid exists only as the hydrate <unk> ( OH )
6 , forming salts containing the <unk> anion Sb ( OH ) −
6 . <unk> metal salts containing this anion yields mixed oxides .
Many antimony ores are sulfides , including stibnite ( Sb
2S
3 ) , <unk> ( Ag
<unk>
3 ) , <unk> , <unk> , and <unk> . Antimony <unk> is non @-@ stoichiometric and features antimony in the + 3 oxidation state and S @-@ S bonds . Several <unk> are known , such as [ Sb
6S
10 ] 2 − and [ Sb
8S
13 ] 2 − .

= = = Halides = = =

Antimony forms two series of halides : <unk>
3 and <unk>
5 . The trihalides SbF
3 , SbCl
3 , <unk>
3 , and <unk>
3 are all molecular compounds having trigonal pyramidal molecular geometry .
The trifluoride SbF

= = = Football League Two play @-@ offs = = =

= = Transfers = =

= = = In = = =

Brackets around club names denote the player 's contract with that club had expired before he joined York .

= = = Out = = =

Brackets around club names denote the player joined that club after his York contract expired .

= = = Loan in = = =

= = = Loan out = = =

= = Appearances and goals = =

Source :

Numbers in parentheses denote appearances as substitute .

Players with names struck through and marked left the club during the playing season .

Players with names in italics and marked * were on loan from another club for the whole of their season with York .

Players listed with no appearances have been in the matchday squad but only as unused substitutes .

Key to positions : GK – Goalkeeper ; DF – Defender ; MF – Midfielder ; FW – Forward

= Antimony =

Antimony is a chemical element with symbol Sb ( from Latin : stibium ) and atomic number 51 . A lustrous gray metalloid , it is found in nature mainly as the sulfide mineral stibnite ( Sb2S3 ) . Antimony compounds have been known since ancient times and were used for cosmetics ; metallic antimony was also known , but it was erroneously identified as lead upon its discovery . In the West , it was first isolated by Vannoccio Biringuccio and described in 1540 , although in primitive cultures its powder has been used to cure eye ailments , as also for eye shadow , since time immemorial , and is often referred to by its Arabic name , kohl .

For some time , China has been the largest producer of antimony and its compounds , with most production coming from the <unk> Mine in Hunan . The industrial methods to produce antimony are roasting and reduction using carbon or direct reduction of stibnite with iron .

The largest applications for metallic antimony are as alloying material for lead and tin and for lead antimony plates in lead – acid batteries . Alloying lead and tin with antimony improves the properties of the alloys which are used in solders , bullets and plain bearings . Antimony compounds are prominent additives for chlorine and bromine @-@ containing fire retardants found in many commercial and domestic products . An emerging application is the use of antimony in microelectronics .

= = Characteristics = =

= = = Properties = = =

Antimony is in the nitrogen group ( group 15 ) and has an electronegativity of 2 @.@ 05 . As expected from periodic trends , it is more electronegative than tin or bismuth , and less electronegative than tellurium or arsenic . Antimony is stable in air at room temperature , but reacts with oxygen if heated , to form antimony trioxide , Sb2O3 .

Antimony is a silvery , lustrous gray metalloid that has a Mohs scale hardness of 3 . Thus pure antimony is too soft to make hard objects ; coins made of antimony were issued in China 's Guizhou province in 1931 , but because of their rapid wear , their minting was discontinued . Antimony is resistant to attack by acids .

Four allotropes of antimony are known : a stable metallic form and three metastable forms ( explosive , black and yellow ) . Elemental antimony is a brittle , silver @-@ white shiny metalloid . When slowly cooled , molten antimony crystallizes in a trigonal cell , isomorphic with the gray allotrope of arsenic . A rare explosive form of antimony can be formed from the electrolysis of antimony trichloride . When scratched with a sharp implement , an exothermic reaction occurs and white fumes are given off as metallic antimony is formed ; when rubbed with a pestle in a mortar , a strong detonation occurs . Black antimony is formed upon rapid cooling of vapor derived from metallic antimony . It has the same crystal structure as red phosphorus and black arsenic , it oxidizes in air and may ignite spontaneously . At 100 ° C , it gradually transforms into the stable form . The yellow allotrope of antimony is the most unstable . It has only been generated by oxidation of stibine ( SbH3 ) at − 90 ° C. Above this temperature and in ambient light , this metastable allotrope transforms into the more stable black allotrope .

Elemental antimony adopts a layered structure ( space group <unk> No. 166 ) in which layers consist of fused ruffled six @-@ membered rings . The nearest and next @-@ nearest neighbors form an irregular octahedral complex , with the three atoms in the same double layer being slightly closer than the three atoms in the next . This relatively close packing leads to a high density of 6 @.@ 697 g / cm3 , but the weak bonding between the layers leads to the low hardness and brittleness of antimony .

= = = Isotopes = = =

Antimony has two stable isotopes : <unk> with a natural abundance of 57 @.@ 36 % and <unk> with a natural abundance of 42 @.@ 64 % . It also has 35 radioisotopes , of which the longest @-@ lived is <unk> with a half @-@ life of 2 @.@ 75 years . In addition , 29 metastable states have been characterized . The most stable of these is <unk> with a half @-@ life of 5 @.@ 76 days . Isotopes that are lighter than the stable <unk> tend to decay by β + decay , and those that are heavier tend to decay by β − decay , with some exceptions .

= = = Occurrence = = =

The abundance of antimony in the Earth 's crust is estimated at 0 @.@ 2 to 0 @.@ 5 parts per million , comparable to thallium at 0 @.@ 5 parts per million and silver at 0 @.@ 07 ppm . Even though this element is not abundant , it is found in over 100 mineral species . Antimony is sometimes found natively ( e.g. on Antimony Peak ) , but more frequently it is found in the sulfide stibnite ( Sb2S3 ) which is the predominant ore mineral .

= = Compounds = =

Antimony compounds are often classified according to their oxidation state : Sb ( III ) and Sb ( V ) . The + 5 oxidation state is more stable .

= = = Oxides and hydroxides = = =

Antimony trioxide ( Sb

4O

6 ) is formed when antimony is burnt in air . In the gas phase , this compound exists as Sb

4O

6 , but it polymerizes upon condensing . Antimony pentoxide ( Sb

4O

10 ) can only be formed by oxidation by concentrated nitric acid . Antimony also forms a mixed @-@ valence oxide , antimony tetroxide ( Sb

2O

4 ) , which features both Sb ( III ) and Sb ( V ) . Unlike oxides of phosphorus and arsenic , these various oxides are amphoteric , do not form well @-@ defined <unk> and react with acids to form antimony salts .

<unk> acid Sb ( OH )

3 is unknown , but the conjugate base sodium <unk> ( [ Na

<unk>

3 ]

4 ) forms upon fusing sodium oxide and Sb

4O

6 . Transition metal <unk> are also known . <unk> acid exists only as the hydrate <unk> ( OH )

6 , forming salts containing the <unk> anion Sb ( OH ) −

6 . <unk> metal salts containing this anion yields mixed oxides .

Many antimony ores are sulfides , including stibnite ( Sb

2S

3 ) , <unk> ( Ag

<unk>

3 ) , <unk> , <unk> , and <unk> . Antimony <unk> is non @-@ stoichiometric and features antimony in the + 3 oxidation state and S @-@ S bonds . Several <unk> are known , such as [ Sb

6S

10 ] 2 − and [ Sb

8S

13 ] 2 − .

= = = Halides = = =

Antimony forms two series of halides : <unk>

3 and <unk>

5 . The trihalides SbF

3 , SbCl

3 , <unk>

3 , and <unk>

3 are all molecular compounds having trigonal pyramidal molecular geometry .

The trifluoride SbF