石膏粉的主要成分是含水的硫酸鈣，大部分都呈白色的透明晶體，因有無結晶水分為“軟石膏”和“硬石膏”。

The main component of gypsum powder is hydrated calcium sulfate, most of which are white transparent crystals. Because of the presence or absence of crystal water, they are "anhydrite" and "Anhydrite".

作為一種墻面基層處理材料，石膏粉又叫膩子粉，主要用來砌墻體，勾縫，墻面找平等。同時石膏粉可以作為混凝土膨脹劑、抗裂劑、自流平砂漿的主要原材料，特種水泥生產中用作復合礦化劑等。

As a wall base treatment material, gypsum powder, also known as putty powder, is mainly used for wall masonry, pointing, and wall leveling. At the same time, gypsum powder can be used as the main raw material for concrete expansion agent, crack resistance agent, and self-leveling mortar, and as a composite mineralizer in the production of special cement.

濟南石膏粉成分：

Composition of Jinan gypsum powder:

CaSO4˙2H2O

CaSO4 ˙ 2H2O

晶體化學：

Crystal chemistry:

理論組成(wB%)：CaO 32.5，SO3 46.6，H2O+ 20.9。成分變化不大。常有粘土、有機質等機械混入物。有時含SiO2、Al2O3、Fe2O3、MgO、Na2O、CO2、Cl等雜質。

Theoretical composition (wB%): CaO 32.5, SO3 46.6, H2O+20.9. The composition changes little. There are often mechanical mixtures such as clay and organic matter. Sometimes it contains impurities such as SiO2, Al2O3, Fe2O3, MgO, Na2O, CO2, Cl, etc.

生石膏粉的成分

Composition of raw gypsum powder

生石膏為二水硫酸鈣（Ca〔SO4〕·2H2O），又稱二水石膏、水石膏或軟 石膏，理論成分CaO32.6%，SO346.5%，H2O+20.9%，單斜晶系，晶體為板狀，通常呈致密塊狀或纖維狀， 白色 或灰、 紅、褐色，玻璃或絲絹光澤，摩氏硬度為2，密度2.3g/cm3；

Raw gypsum is calcium sulfate dihydrate (Ca [SO4] · 2H2O), also known as gypsum dihydrate, hydrogypsum or anhydrite, with theoretical composition of CaO32.6%, SO346.5%, H2O+20.9%, Monoclinic crystal system, crystal is plate shaped, usually dense block or fiber shaped, white or gray, red, brown, glass or silk luster, Mohs hardness of 2, density of 2.3g/cm3;

硬石膏粉的成分

Composition of Anhydrite powder

硬石膏為無水硫酸鈣（Ca〔SO4〕），理論成分CaO41.2%，SO358.8%，斜方晶系，晶體為板狀，通常呈致密塊狀或粒狀，白、灰白色 ，玻璃光澤，摩氏硬度為3～3.5，密度2.8～3.0g/cm3。兩種石膏常伴生產出，在一定的地質作用下又可互相轉化。

Anhydrite is anhydrous calcium sulfate (Ca [SO4. Two types of gypsum are often produced together and can be transformed into each other under certain geological conditions.

石膏粉的種類

Types of gypsum powder

1、石膏粉如果根據其物理成分來區分的話，可以分為：磷石膏粉、脫硫石膏粉、檸檬酸石膏粉和氟石膏粉等。

1. Gypsum powder can be divided into Phosphogypsum powder, desulfurized gypsum powder, citric acid gypsum powder and fluorogypsum powder according to its physical composition.

2、石膏粉如果根據其顏色不同來區分的話，可以分為：紅石膏粉、黃石膏粉、綠石膏粉、青石膏粉、白石膏粉、藍石膏粉、彩色石膏粉等。

2. If gypsum powder is distinguished based on its color, it can be divided into: red stone gypsum powder, yellow stone gypsum powder, green gypsum powder, blue stone gypsum powder, white gypsum powder, blue gypsum powder, color gypsum powder, etc.

3、石膏粉如果根據其不同的物理特征來區分的話，可以分為：白云質石膏粉、粘土質石膏粉、綠泥石石膏粉、雪花石膏粉、滑石石膏粉、含砂質石膏粉和纖維石膏粉等。

3. If gypsum powder is distinguished according to its different physical characteristics, it can be divided into: dolomite gypsum powder, clay gypsum powder, Chlorite group gypsum powder, Alabaster powder, talcum gypsum powder, sandy gypsum powder and fiber gypsum powder.

4、石膏粉如果根據其使用范圍及用途來區分的話，可以分為：建材用石膏粉、化工用石膏粉、模具用石膏粉、食品用石膏粉和鑄造用石膏粉等。

4. If gypsum powder is distinguished based on its scope of use and purpose, it can be divided into: gypsum powder for building materials, gypsum powder for chemical industry, gypsum powder for molds, gypsum powder for food, and gypsum powder for casting.

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