Lanthanum(III) sulfide: Difference between revisions - Wikipedia

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| ImageCaption = <!-- Names -->

| IUPACName = lanthanum(3+);trisulfide

| OtherNames = Dilanthanum trisulfide, lanthanum sesquisulfide

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| Section1 = {{Chembox Identifiers

| CASNo = 12031-49-1

| PubChem = 165996

| ChemSpiderID = 145449

| EINECS = 235-592-1

| DTXSID = DTXSID40923320

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| Section2 = {{Chembox Properties

|La=2| S=3

| Appearance = Yellowreddish-yellow powdercrystals

| Density = 4.9 g/cm³<ref>{{cite web |title=Lanthanum Sulfide |url=https://www.americanelements.com/lanthanum-sulfide-12031-49-1 |publisher=[[American Elements]] |access-date=27 July 2024 |language=en}}</ref>

| Density =

| Solubility = reacts with hot water

| MeltingPtC = 2100

| BoilingPtC =

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| Section3 = {{Chembox Hazards

| GHSPictograms = {{GHS07}}{{GHS02}}

| GHSSignalWord =

| MainHazards =

| FlashPt =

| AutoignitionPt =

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| Section4 = {{Chembox Structure

| CrystalStruct = [[cubic system|cubic]]

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| Section7 = {{Chembox Hazards

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| Section6 = {{Chembox Related

| OtherCations = [[NeodymiumCerium(III) sulfide]], [[Promethium(III) sulfide]]

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'''Lanthanum(III) sulfide''' is a binary [[inorganic]] chemical compound of [[samariumlanthanum]] metal and [[sulfur]] with the chemical formula {{chem2|La2S3}}.<ref>{{cite web |title=Lanthanum (III) Sulfide (La2S3) Powder (CAS 12031-49-1) |url=https://www.samaterials.com/lanthanum/2647-lanthanum-sulfide-la2s3-powder.html |publisher=samaterials.com |access-date=27 July 2024 |language=en}}</ref><ref>{{cite web |title=Lanthanum(III) sulfide {{!}} CAS 12031-49-1 {{!}} SCBT - Santa Cruz Biotechnology |url=https://www.scbt.com/p/lanthanum-iii-sulfide-12031-49-1 |publisher=[[scbt.com]] |access-date=27 July 2024 |language=en}}</ref><ref>{{cite book |last1=Bouroushian |first1=Mirtat |title=Electrochemistry of Metal Chalcogenides |date=23 April 2010 |publisher=[[Springer Science & Business Media]] |isbn=978-3-642-03967-6 |page=32 |url=https://wwwbooks.google.rucom/books/edition/Electrochemistry_of_Metal_Chalcogenides/B8WgWHjN54oC?hlid=en&gbpv=1B8WgWHjN54oC&dq=Lanthanum(III)+sulfide+La2S3&pg=PA32&printsec=frontcover |access-date=27 July 2024 |language=en}}</ref>

==Synthesis==

TheLanthanum(III) sulfide can be prepared from the effect of sulfur vapor on metallic lanthanum:

::{{chem2|2La2 La + 3S3 S -> La2S3}}

TheIt can also be prepared from the effect of hydrogen sulfide on lanthanum:

::{{chem2|2La2 La + 3H2S -> La2S3 + 3H23 H2}}

The effect of [[hydrogen sulfide]] on [[lanthanum oxide]] in the presence of [[reducing agentsagent]]s also produces lanthanum(III) sulfide:

::{{chem2|La2O3 + 3H2S3 H2S + 3C3 C -> La2S3 + 3CO23 CO2 + 3H23 H2}}

==Physical properties==

DilantanDilanthanum trisulfide forms reddish-yellow crystals of the [[cubic system]], spatialwith space group ''I 43d''43''d'', and unit cell parameters a = 0.8706 &nbsp;nm.<ref>{{cite book |last1=Macintyre |first1=Jane E. |title=Dictionary of Inorganic Compounds |date=23 July 1992 |publisher=[[CRC Press]] |isbn=978-0-412-30120-9 |page=3548 |url=https://books.google.com/books?id=9eJvoNCSCRMC&dq=Dilanthanum+trisulfide+La2S3&pg=PA3548 |access-date=27 July 2024 |language=en}}</ref>

DoesIt does not dissolve in cold water.▼

==Chemical properties==

* Reacts with hot water:

::{{chem2|La2S3 + 6 H2O -> 2 La(OH)3 + 3 HS}}

* Reacts with acids:

::{{chem2|La2S3 + 3 HCl -> 2 LaCl3 + 3 H2S}}

* Oxidized by oxygen in athmosphere:

▲Does not dissolve in cold water.

::{{chem2|2 La2S3 + 9 O2 -> 2 La2O3 + 6 SO2}}

==Uses==

{{chem2|La2S3}} is used as a precursor to prepare complex compounds. It is also used in glass manufacturing and in [[optical fiber]]s.<ref>{{cite web |title=Lanthanum(III) sulfide, 99% (REO), Thermo Scientific Chemicals {{!}} Fisher Scientific |url=https://www.fishersci.ca/shop/products/lanthanum-iii-sulfide-99-reo-thermo-scientific/p-4824774 |publisher=[[Fisher Scientific]] |access-date=27 July 2024 |language=en}}</ref>

==References==

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[[Category:Lanthanum compounds]]

[[Category:sulfidesSulfides]]