Technical specification for arrangement of sulfide and similar compound specimen resources

Sulfides and their similar compounds are prone to oxidation and photochemical reactions under surface conditions because they are formed in a reducing environment. The collection, collation and preservation of these specimens should be carried out according to certain technical specifications, otherwise it will not only cause damage to the specimens, but also have adverse effects on the environment and collators. Through the systematic study of such specimens, it is necessary to formulate technical specifications for the arrangement of sulfides and similar compounds.

This procedure specifies the preparation work, working environment requirements and painting steps before painting sulfide and its similar compounds.

This provision was put forward by the National Platform for Basic Conditions of Science and Technology.

Drafting unit of this Regulation: geological museum, China.

The main drafters of this regulation are: Zhang Xihuan, Yang Liangfeng, Lu, Xu Huzeng.

This regulation is interpreted by the national rock and mineral fossil specimen resource sharing platform.

1 range

This regulation specifies the contents and methods of arranging samples of sulfides and similar compounds.

This procedure is applicable to the arrangement of sulfide and its similar compounds.

2 normative reference documents

The clauses in the following documents become clauses of this specification by referring to this specification. For dated reference documents, all subsequent amendments (excluding errata) or revisions are not applicable to this Regulation. However, all parties who have reached an agreement in accordance with these provisions are encouraged to study whether the latest versions of these documents can be used. For undated reference documents, the latest edition is applicable to this regulation.

GB/T9649.9—2009 Classification Code of Geology and Mineral Terms Part 9: Crystallography and Mineralogy

Gao Zhenxi. How do people collect geological samples? Beijing: Geological Publishing House, 1959.

Ge, Tian Huixin, Zeng Ruogu. A concise course in mineralogy. Beijing: Geological Publishing House, 1989.

Pan-Zhao Lu. Crystallography and mineralogy. Beijing: Geological Publishing House, 1993.

Wang pu, Pan, Weng Lingbao etc. Systematic mineralogy. Beijing: Geological Publishing House, 1984.

3 Terms and definitions

The following terms and definitions apply to this procedure:

Sulfide and associated minerals: natural compounds of metal elements with sulfur (S), selenium (Se), tellurium (Te), arsenic (As), antimony (Sb) and bismuth (Bi), in which sulfide is the main one.

4 finishing of sulfide and its similar compounds

4. 1 Preparation before finishing

4. 1. 1 finishing tools

Gloves, brushes, small chisels, sharp needles, small hammers, small water guns, magnifying glasses (magnification 10 is preferred), knives, notebooks, voice recorders, catalog cards, and stickers.

4. 1.2 Sample numbering tool

—— White paint (including paint brush): used for numbering.

-Tape: used to paste the tape number.

-numbering pen: the number used for painting (or tape).

4. 1.3 specimen packaging materials

-Soft paper and cotton: packaging materials to prevent the original crystals of minerals from being destroyed, and can also be used as packaging for small and complete crystals.

-Specimen box: specifications: 2cm×5cm×8cm, 6cm×9cm× 12cm, 3cm×6cm×9cm, 6cm×20cm×30cm.

—— Glass bottles: mainly used for storing mineral specimens that are easy to deliquesce and oxidize and smaller mineral specimens. Stick tape on the outside of the bottle and mark it.

-Tray: containing specimens.

4.2 Working environment requirements

Because sulfide and its similar compounds contain a lot of heavy metal elements or toxic elements, it is necessary to keep the working environment well ventilated and pay attention to the health and safety of workers when sorting such minerals. There should be a platform for placing specimens and a cabinet for storing specimens.

4.3 Dressing steps

4.3. 1 sample cleaning

For the specimens arriving at the destination, take them out after unpacking, and use a brush to remove dust, dirt and other attachments on the mineral surface. According to different requirements and purposes, other minerals (small chisels, sharp needles, etc.) symbiotic or associated with the specimen should be retained or removed. Can be used to remove primary or associated minerals). Note that gloves should be worn when taking and putting specimens. Finally, rinse the specimen with clear water and put the original label into the tray together.

4.3.2 Specimen identification and naming

Combined with the field name or original data, organize experts to identify. Specimens are named according to internationally recognized mineral naming rules. Anyone who meets the criteria for entering Tibet shall enter Tibet together with relevant original materials. Appraisal records shall include appraisal opinions and important differences.

Sample number

When sorting out specimens, mineral specimens should be colored (or taped), and then numbered with an indelible numbering pen. Mineral samples that can't reach the painting granularity level are put into glass bottles, and then tape is attached to the glass bottles, and the number is written on the tape. Sample numbering shall be carried out according to warehouse requirements or other regulations, and corresponding records shall be made. Store the numbered specimens in the specimen cabinet, and write the storage location on the mineral registration account.

4.3.4 sample strengthening treatment

Some specimens are very fragile due to weathering. Therefore, it is necessary to reinforce the specimen with adhesive.

Sample repair

Repair cracks or broken places with adhesives, repairing materials and filling materials, and make records. After the specimen is repaired, its shape, color, etc. Do not change it at will. Photographs and measurement records should be taken before and after repair. Before the repair, relevant experts and technicians should make a repair plan and record the formula, materials and technological process in the repair process. After the repair work is completed, these materials should be classified into the collection files and marked on the catalog card. If it is determined that the loose fragments belong to a specimen, put the fragments in a paper bag with the specimen and then repair the specimen.

4.3.6 Classification and grading of samples

Classification is based on the crystal chemistry of minerals, and then further classification is based on the differences of anions or complex anions in large categories. The classification of sulfides and similar compounds is shown in table 1.

Table 1 classification of sulfides and similar compounds

Classification principle: a large number of common minerals are classified according to their crystal development degree and crystal size; For rare minerals, under the condition of setting the same grade, the requirements for crystal development degree and crystal size can be reduced.

4.3.7 Specimen taking photos

Photographers use cameras to shoot in the studio, capture close-ups from all angles, provide real and accurate pictures of objects, reprocess colors and backgrounds, try to be undistorted and consistent with the original, and check them.

4.3.8 Making Cataloging Cards

Arrange according to Table 2, make cataloging cards, bind them into volumes every year, and keep them centrally. Labels and notes on specimens should be legible.

Table 2 Composition Table of Mineral Specimen Catalogue Information Data

Table 2 (continued)

Packaging and storage

Specimens that have completed the above procedures need to be packed in soft paper, cotton or boxes; For samples that are easy to be oxidized, dehydrated or deliquesced, they can be sealed (or wax sealed) or packed in glass bottles. For samples that are prone to photochemical reactions, put them in dark glass bottles or pack them with dark paper. Small specimens are put in glass bottles. Non-compressive specimens are packed in hard containers. Packaging materials must adapt to the characteristics of specimens, clean and durable, and easy to carry, pile up and count after packaging. Field records of specimens are packaged with original data and cataloging cards.

Packaged specimens are classified and put on shelves according to scientific methods and put in corresponding positions in the warehouse. Don't put too many specimens in the test tube rack or storage box. First-class collections, confidential collections and collections with precious economic value should be stored in special warehouses or counters. All kinds of specimens in the cupboard must be put on the account or on the CD-ROM, so as to find them at any time.

The warehouse should be solid, airtight and ventilated. The warehouse should have fire prevention, anti-theft, moisture-proof, dust-proof, light (ultraviolet) proof, earthquake prevention, air pollution prevention and alarm equipment or measures. The warehouse and its vicinity should be kept clean and tidy. It is forbidden to store inflammable, explosive, corrosive and other items that hinder safety, and fireworks are strictly prohibited. When there is no one in the warehouse area, all power supplies and master gates should be turned off.

4.3. 10 data sorting and saving

Cataloging cards shall be made in duplicate, one of which shall be put into storage with mineral specimens, and the other shall be kept in a data account, so that the accounts shall be clear, the cataloging shall be detailed, easy to check and use, and properly kept.

Five preventive measures

When managing and using sulfide and its similar composite minerals, staff must pay attention to the safety and protection of people and things (especially food and drinking water) in themselves and the surrounding environment. Used specimens and medicinal materials should be collected and treated centrally to prevent loss and misuse. Personnel must abide by the relevant provisions of safe use for safety protection. To prevent the sample from contacting the skin and entering the eyes, mouth, nose, etc.

Sulfide and its similar compounds are easy to be scratched by other objects because of their low hardness, and most minerals are easy to cleave, so be careful not to be squeezed by hard objects. Specimens must be carefully placed. Don't put books and heavy objects on unprotected specimens.

When sampling (especially when moving the sample from one place to another), keep the sample stable and fully supported.

Be extra careful when using specimens to prevent damage to specimens and loss of specimen fragments. Once many specimens are lost, they cannot be made up.

The keeper must establish the idea of serving others, have a serious and responsible working attitude and take good care of the specimens.