The classification scheme C01P is systematically applied for classification of crystal-structural features (C01P 2002/00-C01P 2002/90), particle morphologies (C01P 2004/00-C01P 2004/90) and properties (C01P 2006/00-C01P 2006/90) of solid inorganic materials. The scheme is used for all incoming documents classified in C01B-C01G and in C09C from 1994 onwards. Although gradually extended, the major part of the present scheme is operational from 2003.

The back-log of the following C01-groups is completely classified according to the C01P-scheme:

C01B 13/14-C01B 13/366 (oxides in general complete)

C01B 17/20-C01B 17/46

C01B 19/00-C01B 19/04 (all selenides, tellurides)

C01B 21/06-C01B 21/076 (all nitrides)

C01B 21/082-C01B 21/0828

C01B 32/90-C01B 32/956 (all carbides)

C01B 33/18-C01B 33/193

C01C 3/08-C01C 3/12 (all cyanides)

C01F 5/02-C01F 5/38

C01F 7/02-C01F 7/046

C01F 7/14-C01F 7/18

C01F 7/30-C01F 7/36

C01F 7/42-C01F 7/46

C01F 7/56-C01F 7/62

C01F 7/77 – C01F 7/788

C01F 11/02-C01F 11/186

C01F 11/46-C01F 11/468

C01F 17/00

C01F 17/10-C01F 17/38

C01G 1/02

C01G 3/006-C01G 3/02

C01G 21/006-C01G 21/10

C01G 21/22

C01G 23/002-C01G 23/006

C01G 23/04-C01G 23/08

C01G 25/006-C01G 25/02

C01G 27/006-C01G 27/02

C01G 28/002-C01G 28/005

C01G 28/02-C01G 28/026

C01G 29/00

C01G 29/006

C01G 30/002

C01G 30/004-C01G 30/005

C01G 30/02-C01G 30/026

C01G 31/006-C01G 31/02

C01G 33/00

C01G 33/006

C01G 35/00

C01G 35/006

C01G 37/006-C01G 37/033

C01G 39/006-C01G 39/02

C01G 41/006-C01G 41/02

C01G 43/006-C01G 43/025

C01G 45/006-C01G 45/02

C01G 47/00

C01G 47/006

C01G 49/0018-C01G 49/08

C01G 51/006

C01G 51/04

C01G 53/006

C01G 53/04

C01G 55/002

C01G 55/004

C01G 56/003

C01G 56/005

C01G 99/00

C01G 99/006

This classification scheme is applicable to the whole class C01 and subclass C09C.

Classes are attributed as complete as possible which can easily result in a number of 3 to 10 C01P-classes attributed per document.

Features relating to the crystal structure of inorganic compounds, which are independent from the size of the particles (C01P 2004/00) and which cannot be qualified as a macroscopic physical property (C01P 2006/00).

Any image obtained by TEM or HRTEM, of particles completely or partially.

Care should be taken not to use this class for SEM- (Scanning Electron Microscope) images which are not used for depicting crystal structures.

Mostly only attributed to compounds which are described as being 100% amorphous.

Structures not classified below, e.g. compounds with the garnet-structure

All compounds with the spinel structure.

All compounds with the perovskite structure.

Structures wherein one or more cations or anions can be replaced by other ion without change of the crystal structure.

Complete solid solutions are double classified according to both end members.

The definition of dopant differs depending on the technical field.

In class C01 regarding the amount of replacing cation or anion is a limit value of about 5 atom-% taken as a rule.

The crystallite size differs from the particle size (C01P 2004/60-C01P 2004/64) in that it concerns the crystalline domain size, i.e. the smallest single crystalline part of the material.

Tables or X-ray diagrams specifying d- or two theta-values together with intensities.

Situations wherein only peak intensities or a ratio of two intensities are given.

Symmetry indications: e.g. orthorhombic or hexagonal. Example: hexagonal BN.

'Structure diagrams' include all two and three dimensional ways of depicting the structure of a solid material.

E.g. layer distances as specified in layered double hydroxide compounds (as such classified in C01P 2002/22).

Infra-red and Raman spectroscopy data (0.7-300 micrometer = 700-300.000 nm)

UV and visible light data (380-750 nm wavelength).

Nuclear Magnetic Resonance and Electron Spin Resonance data.

Features relating to the size or shape of particles of inorganic compounds.

Care should be given not to confuse SEM (Scanning Electron Microscope) and TEM (Transmisson Electron Micrsocope) images.

Check the description carefully about this. Mostly is the magnification factor an indicator.

Care should be given not to confuse SEM (Scanning Electron Microscope) and TEM (Transmisson Electron Micrsocope) images.

Check the description carefully about this. Mostly is the magnification factor an indicator.

All those particles whereby one dimension is significantly larger that the other two.

The shape refers to the section considered perpendicular to the length.

The shape refers to the section considered perpendicular to the length.

Nanotubes as defined by ISO/TS 27687 (available in BNS as XP008113666): being hollow nanofibres whereby a nanofibre is a nanoobject with two external dimensions in the nanoscale (1-100 nm).

Nanofibres as defined by ISO/TS 27687 and further limited to those solid nanofibres with nearly equal dimensions in the nanoscale (1-100 nm).

Nanofibres as defined by ISO/TS 27687 and further limited to those solid nanofibres with nearly equal dimensions in the nanoscale (1-100 nm).

All those particles whereby two dimensions are significantly larger than the third one.

Nanoplates as defined by ISO/TS 27687 and further defined as particles with only one dimension in the nanoscale (1-100 nm).

All those particles of particular shape and not belonging to C01P 2004/10 or C01P 2004/20.

Aggregates in which particles are hold together by strong forces (chemical bonds also qualified as cementation) and wherein the resulting external surface area is significantly smaller than the sum of the surface area of the individual components.

Agglomerates in which particles are hold together by weak forces (Van der Waals forces or simple physical entanglement) and wherein the resulting external surface area is about similar to the sum of the surface area of the individual components.

Any particle size distribution (e.g. three size distribution peaks) not classified in C01P 2004/52 or C01P 2004/53

Documents in which the particle size distribution is qualified as monodisperse or by a narrow size distribution curve.

This class is mostly given in case of needle-like or plate-like particles (high a.r.) However also to three dimensional particles in order to express the gact that they are equaxed in the three directions (low a.r.).

The indication of the largest size of the particle.

In case particles are characterised by a primary and secondary particles size does the size refer to the secondary particle size.

In case a document discloses a range for the particle size is the whole range classified including the both end members of the range.

Examples:

disclosed: d= 50-250 nm, classes given: C01P 2004/64, C01P 2004/62

disclosed: d= 0,25-80 micrometer, classes given: C01P 2004/62, C01P 2004/61

Nanoparticles as defined by ISO/TS 27687: being nanoobjects with all three dimensions in the nanoscale (1-100 nm).

Features relating to the macroscopic physical properties of inorganic compounds.

Values of densities for 100% full dense materials.

Density values of tapped powders without further consolidation e.g. by pressing.

Values mostly obtained as BET-values and expressed in m²/g.

Value mostly expressed as m²/g after heating at a specified T and t.

Mostly expressed as m³/g.

The resistance of particles against applied mechanical forces.

Mostly aqueous suspensions of particles, e.g. of calcium carbonate in water.

E.g. thermal conductivity of AlN.

Colour of inorganic materials.

In general only added in combination with EC's which explicitly does address the purity of a product compound. Documents classified in purification-groups (e.g. C01F 7/46) should exceptionally get this code.

E.g. water content after dehydration treatments.