A Cu containing zeolitic material having framework structure CHA and having an alkali metal content of 1000 ppm or less, having a composition comprising the molar ratio (n YO 2): X 2 O 3 wherein X is a trivalent element, Y is a tetravalent element and n is at least 10, preferably at least 15, more preferably in the range of from 15 to 70, and wherein the Cu content of the zeolitic material, calculated as elemental Cu, is at least 0.5 wt.-%, based on the total weight of the calcined zeolitic material, wherein the P content of the calcined material is below 500 ppm, and wherein the edges of at least 90 % of the crystallites of the calcined zeolitic material have a mean length in the range of from 1 to 5 micrometer, determined via SEM; wherein the zeolitic material is obtained by a process comprising: (i) preparation of an aqueous solution containing at least one source for X 2 O 3 and at least one source for YO 2, at least one structure directing agent suitable for the preparation of a zeolitic material having CHA framework structure, and at least one Cu source, wherein said aqueous solution does not contain a phosphor source and has an alkali metal content of 1000 ppm or less; (ii) hydrothermal crystallization of the aqueous solution according to (i) which does not contain a phosphor source, obtaining a suspension containing the copper containing zeolitic material having CHA framework structure; wherein the structure directing agent is a mixture of 1- adamantyltrimethylammonium hydroxide and benzyltrimethylammonium hydroxide or a mixture of 1-adamantyltrimethylammonium hydroxide and tetramethylammonium hydroxide or a mixture of 1-adamantyltrimethylammonium hydroxide and benzyltrimethylammonium hydroxide and tetramethylammonium hydroxide, wherein the molar ratio of 1-adamantyltrimethylammonium hydroxide to benzyltrimethylammonium hydroxide or to tetramethylammonium hydroxide or to the sum of benzyltrimethylammonium hydroxide and tetramethylammonium hydroxide is in the range of from 1: 5 to 1: 1; wherein the process is characterized by the aqueous solution subjected to hydrothermal crystallization according to (ii) being free of sodium, and preferably being free of alkali metal. wherein X is a trivalent element, Y is a tetravalent element and n is at least 10, preferably at least 15, more preferably in the range of from 15 to 70, and wherein the Cu content of the zeolitic material, calculated as elemental Cu, is at least 0.5 wt.-%, based on the total weight of the calcined zeolitic material, wherein the P content of the calcined material is below 500 ppm, and wherein the edges of at least 90 % of the crystallites of the calcined zeolitic material have a mean length in the range of from 1 to 5 micrometer, determined via SEM; wherein the zeolitic material is obtained by a process comprising: (i) preparation of an aqueous solution containing at least one source for X 2 O 3 and at least one source for YO 2, at least one structure directing agent suitable for the preparation of a zeolitic material having CHA framework structure, and at least one Cu source, wherein said aqueous solution does not contain a phosphor source and has an alkali metal content of 1000 ppm or less; (ii) hydrothermal crystallization of the aqueous solution according to (i) which does not contain a phosphor source, obtaining a suspension containing the copper containing zeolitic material having CHA framework structure; (i) preparation of an aqueous solution containing at least one source for X 2 O 3 and at least one source for YO 2, at least one structure directing agent suitable for the preparation of a zeolitic material having CHA framework structure, and at least one Cu source, wherein said aqueous solution does not contain a phosphor source and has an alkali metal content of 1000 ppm or less; (ii) hydrothermal crystallization of the aqueous solution according to (i) which does not contain a phosphor source, obtaining a suspension containing the copper containing zeolitic material having CHA framework structure; wherein the structure directing agent is a mixture of 1- adamantyltrimethylammonium hydroxide and benzyltrimethylammonium hydroxide or a mixture of 1-adamantyltrimethylammonium hydroxide and tetramethylammonium hydroxide or a mixture of 1-adamantyltrimethylammonium hydroxide and benzyltrimethylammonium hydroxide and tetramethylammonium hydroxide, wherein the molar ratio of 1-adamantyltrimethylammonium hydroxide to benzyltrimethylammonium hydroxide or to tetramethylammonium hydroxide or to the sum of benzyltrimethylammonium hydroxide and tetramethylammonium hydroxide is in the range of from 1: 5 to 1: 1; wherein the process is characterized by the aqueous solution subjected to hydrothermal crystallization according to (ii) being free of sodium, and preferably being free of alkali metal.