Plagioclase is the most abundant mineral in basaltic andesites in the north Gavkhouni. Olivine and pyroxene are the other rock forming mineral there. In their 3-dimensional shapes, they are unequal and varies between bladed to prolate. Plagioclase sometimes exhibit dusty texture, oscillatory zoning and sinusoid growth. Based on CRYSTAL SIZE DISTRIBUTION data, the rate of CRYSTAL nucleation of plagioclase varies between 2. 77*10-8-3. 07*10-8 mm-3s-1 in 71. 78-17. 77 years. The results indicate the higher nucleation rate, rapid cooling and a short CRYSTAL residence time in the magma chamber. The CRYSTAL SIZE DISTRIBUTION diagrams show the high frequency of smaller CRYSTALs and the coarsening of the average CRYSTALs. However, the presence of two populations of plagioclase indicates the interfering of new magma with the same chemical composition and new CRYSTAL population into the magma chamber. This event can increase the volume of the magma chamber pressure and eruption of the magma.

One of the components of Gysian Silvana ophiolite in the south of Urmia and the continuation of the Neo-Tethys in the northwesthern of Iran is serpentinites with lizardite/chrysotile and magnetite phases as the main mineral and chromite (Cr-spinel) and some rare olivine and orthopyroxenes. A variety of microstructures such as mesh, sieve, lamellar, fibrous, and hourglass were identified. The existence of lizardite plates (001) crosswise in the margin of a low CRYSTALlized mass nucleus of net texture is determined by microstructures. Due to the lack of antigorite in the serpentinites, the depth of subduction of the Neo-Tethys slab in this part of Iran may be low. The CRYSTAL SIZE DISTRIBUTION (CSD) of the Gysian serpentinite chromites was studied.  We discriminate three types of CSD patterns for chromite CRYSTALs, extract nucleation, and growth parameters from intercept and slope values of the patterns. The first type is a linear steady-state pattern with a nucleation rate/growth rate (J/G) of about 12 and Gt=1.28; the second type has a non-linear concave downtrend which is the result of annealing or Ostwald ripening at a small SIZE part with J/G=13-15 and Gt=1.33. The third type is complex and shows nucleation density with two separate parts. It could be modeled by two CRYSTAL populations, small and large SIZEs overlapping linear patterns. The J/G for small CRYSTALs was twice for large SIZEs and multiple nuclei have less growth. The Gt was 1.60 for small and 1.10 for those large SIZEs. Assuming the constant CRYSTAL growth rate in silicate materials is 10-9 cm/s, the time for the growth of large chromites is six times longer than that of small CRYSTALs. These two segmental CSD patterns probably present arising processes or alteration production of mafic minerals as small chromites.

Sodium chloride, being consumed by human being from long time ago, is one of the most important existing electrolytes in intercellular liquids of the body. The quality of Sodium chloride has always been an important issue because of its daily consumption and also its application in food industries. There is variety of methods to increase the quality of sodium chloride. CRYSTALlization is one of the most common industrial methods to prepare food grade sodium chloride. In this method, different operational factors such as heat load transferred to the CRYSTALlizer, residence time, of magma in CRYSTALlizer, mixer speed and feed concentration affect  the purity and SIZE of the produced salt. In the current research work an appropriate bench scaled CRYSTALlizer with a reservoir volume of 10 lit has been designed and implemented for quantitative investigation of the effects of these factors on sizing of sodium chloride CRYSTALs.In this paper, using taguchi analysis method, effects of all parameters on sodium chloride CRYSTALlization has been investigated in three different levels by running 9 double repetition tests (totally 18 tests) and the results have been statistically analyzed using qualitek-4 software. Test results show that heating load has the highest effect on CRYSTAL sizing of the final product while feed concentration and residence time have lower affects. The effect of mixer speed is negligible. Finally, the best operating conditions for production of CRYSTALline salt has been determined to be feed concentration of 37% salt, mixer speed of 900 rpm, residence time of 60 minutes and heating load of 500 Watt.

Background: Chlorzoxazone (CHZ) is a water-insoluble drug having bioavailability problems. The absorption rate of such drugs can be improved by reducing their particle SIZE. In this work, the CRYSTAL growth kinetics of CHZ– ethanol for different degrees of supersaturation (SS) has been studied. Methods: The equilibrium solubility data of CHZ in ethanol is determined by the shake-flask method within the 283. 15– 313. 15 K temperature range. The mole fraction solubility of CHZ is calculated and correlated with the modified Apelblat equation, λ h equation, van’ t Hoff equation, Wilson, and non-random two liquid (NRTL) equation. Batch CRYSTALlization experiments are performed on three different degrees of SS-1. 16, 1. 18, and 1. 20 at 293. 15 K as a function of time. Results: The maximum root mean square difference (RMSD) and relative average deviation (RAD) values of 169. 24 ×10-6 and 0. 699 ×10-2, respectively, are observed in the NRTL equation model. The dissolution properties such as standard enthalpy, standard entropy, and Gibbs free energy are predicted using van’ t Hoff equation. Using a simple integral technique, the average CRYSTAL growth rate constant KG is calculated as 1. 58 (μ m/min) (mg/ml)-1 and the order n=1 for CHZ– ethanol at 293. 15 K. Conclusion: The obtained result concludes that the CRYSTAL’ s growth SIZE is found to be varied at different SS ratio in batch CRYSTALlization. The particle SIZE control in batch CRYSTALlization can be achieved by optimizing the operating conditions to get the desired SIZE CRYSTALs.

The study of quantitative textural analysis and CRYSTAL SIZE DISTRIBUTION on amphibole, plagioclase and quartz in the company of microprobe and thermobarometry investigations on amphibole phenocrysts, guide us to some information about magma process in magma chambers. Petrographic studies with microprobe and CRYSTAL SIZE DISTRIBUTION investigations in Neogene igneous rocks of SW of Tehran, demonstrate that there are three populations of amphiboles related to different conditions of CRYSTALlization in different depths and point to existence of at least three magma chambers below the volcano in this area. The occurrences of plagioclase in lavas confirm that magma evolution take place at lower depth in a magma chamber near the surface of the earth and at the lower fugacity of water.

The studied sample presents garnet textural sector-zoning as inclusions in two types in garnet schist from Morlaix, North-West Brittany, France. CRYSTAL SIZE DISTRIBUTIONs (CSD) of quartz CRYSTALs were measured in both types inclusions, in the matrix and strain shadows around garnet porphyroblasts using Back-scatter electron (BSE) images. The CSD plots of quartz CRYSTALs show an increase of average in SIZEs from type 1 inclusion, 60mm, to the matrix, 116 mm, and strain shadow, 248 mm,. These differences could be explained of quartzes SIZE DISTRIBUTION by many processes such as capturing by pophyroblast, CRYSTAL face, annealing and grain boundary migration.

The CRYSTALlization history of a rock is recorded by the SIZE and the DISTRIBUTION of its minerals. The porphyroblast CRYSTAL SIZE in metamorphic rocks can give notable information about its growing medium. Considering the varieties of mineralogy in the Hassan-Abad's skarn and high frequency of garnet porphyroblasts in different metamorphic zones and special different SIZEs in the first metamorphic zone of the NE skarn, the CRYSTAL SIZE DISTRIBUTIONs of this mineral is studied. With regard to this, digital photos of cutting surface were provided and analyzed by JMicrovision software. It has been expected, two different slopes can show three suspections: 1- parent rock composition effect; 2- CRYSTAL growing time; 3- fluid flow around plutonic rock. According to the presence of clintonite, vesuvianite and garnet and as many as joints in the region, the role of fluid in growing the SIZE of garnet porphyroblast in part of the first metamorphic zone seem to be noticeable.

CRYSTAL SIZE DISTRIBUTION (CSD) in metamorphic rocks provides fundamental information about CRYSTAL nucleation and growth rate, growth time and the degree of overstepping. CSD data for garnet, staurolite, kyanite and andalusite CRYSTALs from the aureole demonstrate that the earliest formed of these minerals, garnet, has the highest population density and the shortest growth time. The last formed mineral, andalusite, has the lowest population density and longest growth time. Kyanite and staurolite have the similar population density and growth times intermediate between those of garnet and andalusite. These data demonstrate the effect of the degree of overstepping on the nucleation and growth rates of minerals during metamorphism.