Molecule structure of Nickel arsenide (CAS NO.27016-75-7) :

IUPAC Name: arsanylidynenickel 
Molecular Weight: 133.615 g/mol
Molecular Formula: AsNi 
Exact Mass: 132.856944
MonoIsotopic Mass: 132.856944
Heavy Atom Count: 2
Complexity: 10
Canonical SMILES: [Ni]#[As]
InChI: InChI=1S/As.Ni
InChIKey: UIFOTCALDQIDTI-UHFFFAOYSA-N
EINECS: 248-169-1

When, in the medieval German Erzgebirge (ore mountains), a red mineral resembling copper-ore was found, the miners looking for copper could extract none from it, as it contains none. They blamed a mischievous sprite of German mythology, Nickel (similar to Old Nick) for besetting the copper (German: Kupfer): the mischievous Kupfernickel. This German equivalent of "copper-nickel" was used as early as 1694 (other old German synonyms are Rotnickelkies and Arsennickel).
In 1751, Baron Axel Fredrik Cronstedt was attempting to extract copper from kupfernickel mineral, and obtained instead a white metal that he called after the spirit, nickel. In modern German, Kupfernickel and Kupfer-Nickel designates the alloy Cupronickel.
The names Nickeline (Nickeline or niccolite is a mineral consisting of Nickel arsenide (CAS NO.27016-75-7), NiAs, containing 43.9% nickel and 56.1% arsenic.Small quantities of sulfur, iron and cobalt are usually present, and sometimes the arsenic is largely replaced by antimony. Forms an isomorphous series with breithauptite (nickel antimonide).)(F. S. Beudant, 1832) and niccolite (J. D. Dana, 1868) refer to the presence of nickel (Lat. niccolum).

NTP 10th Report on Carcinogens. IARC Cancer Review: Animal Limited Evidence IMEMDT    IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 49 ,1990,p. 257.(World Health Organization, Internation Agency for Research on Cancer,Lyon, France.: ) (Single copies can be ordered from WHO Publications Centre U.S.A., 49 Sheridan Avenue, Albany, NY 12210) . Reported in EPA TSCA Inventory.

Confirmed human carcinogen. When heated to decomposition it emits toxic vapors of nickel and arsenic.
RIDADR: UN1557
HazardClass: 6.1
PackingGroup: II
 

ACGIH TLV: TWA 0.01 mg/m³; Confirmed Human Carcinogen; BEI: 35 µ (As)/L inorganic arsenic and methylated metabolites in urine; TWA 1 mg(Ni)/m³

 Nickel arsenide (CAS NO.27016-75-7) is also called Nickelarsenide(nias) ; Nickelarsenide99.5%(metalsbasisexcludingco)co0.1-1%10mm&downlump ; Arsinidynenickel(III) .