GB/T 15676-2015Terms for rare earths (English PDF)
稀土术语
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Issued by
General Administration of Quality Supervision, Inspection and Quarantine; Standardization Administration of the PRC
Level / Type
National · Recommended
Issue date
September 11, 2015
Implementation date
April 1, 2016
Scope
GB/T 15676-2015 is the English-translated version of 稀土术语.
China's national vocabulary for the rare earths - the whole chain from the mineral in the ground to the functional material in a finished device. It establishes the general terms, the terms for rare earth minerals and concentrates, for the compounds and metals that come out of smelting and separation, for the rare earth alloys, and for the rare earth functional materials. China produces and processes most of the world's rare earths, and the vocabulary has to serve an industry in which a single element is traded as an ore, an oxide, a chloride, a metal, a master alloy and a sintered magnet, each with its own trade names and its own history of naming. The general terms fix what is meant by a rare earth at all, by light and heavy fractions, by the individual and mixed forms, by purity expressed as a ratio between one oxide and the total. The minerals section names the ores and the concentrates. The smelting and separation section is divided into single rare earths, mischmetal, single and mixed oxides and the salts. The alloys section covers the ferroalloys, the non-ferrous alloys and the rest. And the functional materials section, which is the longest, runs through the applications on which the industry now depends: permanent magnets, hydrogen storage alloys, phosphors, polishing powders, magneto-optical and laser materials, giant magnetostrictive materials, superconductors, magnetic refrigeration materials, catalysts, heating materials, cathode emissive materials, magnetic electronic materials, microwave absorbers, nuclear materials and scintillation crystals. Bilingual indexes of the Chinese and English terms are included. Issued on 11 September 2015 and in force since 1 April 2016, it replaces GB/T 15676-1995.
Document preview — GB/T 15676-2015
National Standard of the People's Republic of China
- ICS
- 77.120.99
- Classification
- H 04
- Replacing
- GB/T 15676-1995
Issued by: General Administration of Quality Supervision, Inspection and Quarantine; Standardization Administration of the PRC
Contents
- ForewordIII
- 1 Scope1
- General terms 12
- 3 Rare earth minerals and concentrate5
- 4 Rare earth metal compound (smelting separation products)7
- 4.1 Single rare earth7
- 4.2 Misch9
- 4.3 Single rare earth oxide9
- 4.4 Mixed rare earth oxide11
- 5 Rare earth alloy15
- 5.1 Rare Earth Ferroalloy15
- 5.2 Nonferrous alloys of rare earth16
- 5.3 Other rare earth alloy17
- 6 Rare Earth Functional Materials17
- 6.1 Rare earth permanent magnet material17
- 6.3 Rare earth luminescent material25
- 6.5 Rare earth magneto-optical material30
- 6.7 Giant magnetostrictive material32
- 6.9 Rare earth magnetic refrigeration material32
Foreword
This standard was drafted in accordance with GB/T 1.1-2009 given rules.
This standard replaces GB/T 15676-1995 "rare-earth terms."
This standard compared with GB/T 15676-1995, in addition to editorial changes, the major technical changes are as follows.
--- Reg modified structure, standards are divided into "general terms of rare earth, rare earth minerals and enrichment, and rare earth metal compounds, rare earth
Alloys, rare earth functional materials, application of rare earth products, rare earth production technology, rare earth recyclables "eight parts, instead of the original standard
"Usually the term rare earth, rare earth minerals and enrichment of rare earth alloy and cast iron, rare earth products, the application of rare earth products, Production Engineering
Arts, part inspection and analysis of eight rare earths other common terminology Definitions ";
--- Original standard of "rare earth alloy and cast iron" clauses were moved "rare earth metal" and "application of rare earth products" clauses, the original standard
"Rare earth products" reg refinement as "rare earth metals and their compounds" and "Rare Earth Functional Materials" reg;
--- An increase of rare earth functional materials reg, presented by category of rare earth permanent magnetic materials, rare earth hydrogen storage materials, rare earth polishing materials, rare earth made
Light materials and other related terms (see 6.1 and 6.16);
--- Increased RE reg recyclables by category given rare earth waste gas, waste and other related terms (see 9.1 to 9.4);
--- Delete the original standard "test analysis of commonly used terms and definitions" section (see Chapter 8 of the 1995 edition);
--- Delete the original standard of "rare earth other aspects of the terms and definitions" (see the 1995 edition, Chapter 9);
--- A total of 30 entries deleted, an increase of 275 entries.
This standard by the National Standardization Technical Committee of rare earth (SAC/TC229) and focal points.
This standard is mainly drafted by: Baotou Rare Earth Research Institute, the National Product Quality Supervision and Inspection Center of rare earth, rare earth Metallurgy and Riko functional material
Materials National Engineering Research Center Co., Ltd., Technical and Economic Research Institute of Nonferrous Metal, Iron and Steel Research Institute of Functional Materials, Beijing industrial
1 Scope
This standard specifies the general terms of rare earth, rare earth minerals and enrichment, and rare earth metal compounds, rare earth alloy, rare earth functional materials
Materials, application of rare earth products, rare earth production technology, rare earth recyclables and other commonly used terms and definitions related aspects.
This standard applies to the production, use, testing, distribution, research and teaching in areas such as rare earth, as a unified technical term basis.
2.1 RE rareearth
Periodic table of elements from the lanthanide atomic number 57-71, namely lanthanum (La), cerium (Ce), praseodymium (Pr), neodymium (Nd), promethium (Pm), samarium
(Sm), europium (Eu), gadolinium (Gd), terbium (Tb), dysprosium (Dy), holmium (Ho), erbium (Er), thulium (Tm), ytterbium (Yb), lutetium (Lu) and atomic order number 21
General of scandium (Sc), 39 yttrium (Y) a total of 17 elements. Usually represented by the symbol RE, it is a set of elements similar chemical properties. Currently
In the rare earth industry and product standards, generally refers to a rare earth promethium (Pm), 15 elements scandium (Sc) other than the addition.
2.2 Rare Earth Elements rareearthelements
See 2.1.
2.3 Light Rare Earth lightrareearthelements
General lanthanum (La), cerium (Ce), praseodymium (Pr), neodymium (Nd) 4 elements.
2.4 Rare Earth middlerareearthelements
General samarium (Sm), europium (Eu), gadolinium (Gd) 3 elements.
2.5 HREE heavyrareearthelements
Terbium (Tb), dysprosium (Dy), holmium (Ho), erbium (Er), thulium (Tm), ytterbium (Yb), lutetium (Lu), yttrium (Y) 8 elements in general.
2.6 Cerium RE cerium-grouprareearthelements
Cerium (Ce) consisting mainly of a group of rare earths, including lanthanum (La), cerium (Ce), praseodymium (Pr), neodymium (Nd), samarium (Sm), europium (Eu) 6 elements.
2.7 Yttrium group rare earth yttrium-grouprareearthelements
Yttrium (Y) consisting mainly of a group of rare earths, including gadolinium (Gd), terbium (Tb), dysprosium (Dy), holmium (Ho), erbium (Er), thulium (Tm), ytterbium (Yb),
Lutetium (Lu), yttrium (Y) 9 elements.
2.8 Lanthanide contraction lanthanidecontraction
Atomic radius and ionic radius of the lanthanide elements with increasing atomic number gradually decrease. Causes of the lanthanides
In each additional proton nucleus, there will be a corresponding 4f electrons into orbit, while the 4f electrons of the inner electron nuclear shield is better, because
This increases with the atomic number, the effective nuclear charge increases, check the outermost electron attraction enhancements make atomic radius and ionic radius gradually reduced.
Remaining clauses in the full document
- 3 Rare earth minerals and concentrate
- 4 Rare earth metal compound (smelting separation products)
- 5 Rare earth alloy
- 6 Rare Earth Functional Materials
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 35 pages — is available in the English PDF.
Referenced standards
Cited by
- GB/T 47011-2026Technical specification for blockchain-based data sharing of rare earth permanent magnet materials
- GB/T 47102-2026Greenhouse gases - Quantification method and requirements for the carbon footprint of products - Rare earth permanent magnet materials
- GB/T 29655-2025Strip-casting neodymium iron boron alloy flakes
- GB/T 45757-2025Polymer-bonded neodymium iron boron compounds pellets
- GB/T 45983.1-2025Rare earths thermo-chemical treatment — Part 1: Carburizing and carbonitriding
- GB/T 4137-2024Rare earth ferrosilicon alloy
Similar standards
GB/T 15676-1995|GB/T 16484|GB/T 18115|GB/T 14635-2008|GB/T 4153-2008|GB/T 26417-2010
Editions of GB/T 15676
| Edition | Title | Revision | Status |
|---|---|---|---|
| GB/T 15676-2015 | Terms for rare earths | first revision | Current |
| GB/T 15676-1995 | Terms for rare earths | first issue | Superseded |
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