TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Component: The oxide is an oxide of element(s) from first row transition metal elements (preferably), zinc, magnesium (preferably), aluminum, or silicon. It is preferably an oxide of element(s) from titanium, vanadium, chromium, manganese, iron, cobalt, nickel, copper, zinc, magnesium, aluminum, silicon, gold, antimony, or lanthanum. The oxide is present in an amount of less than or equal to 0.1 mole% relative to the composition. The composition further comprises carbon. An amount of the oxide and the material form a cocrystalline portion. An additional amount of the oxide forms an outer portion that at least partially surrounds the cocrystalline portion. The carbon at least partially surrounds the outer portion. The composition is nanoscale. The material and the oxide in a cocrystalline form are represented by the formula MyXO4.zB or AxMyXO4.zB.B=the oxide; andz= less than or equal to 0.1.Preferred Process: At least one of the combining and obtaining steps includes adjusting pH. The combining step includes first combining the first material and the solution to produce a first solution and then combining the first solution and the third material. The milling step is sufficient to produce the semicrystalline nanoscale particle mixture. The step of calcining the precursor includes calcining the precursor in the presence of an inert gas and carbon particles suspended in the inert gas. The process further includes adding a reducing agent. Preferred Definitions:    A=element(s) from Li, Na or K; or element(s) from alkali metal elements;    M=element(s) from first row transition metal elements; element(s) from transition metal elements; or at least one element M1 from Mn, Fe, Co or Ni, and at least one element M2 from Ti, V, Cr, Mg, Fe, Co, Ni, Cu, Zn, Mg, Al, Si, Au, Sb or La, where M1 and M2 are not the same; and    X=element(s) from P (preferably) or As.    EXAMPLE - Diammonium hydrogen phosphate (0.2 mole) and citric acid (0.25 mole) were mixed and dissolved in deionized water (300 ml) to form an acidic solution. Triton X-100(RTM: non-ionic surfactant) (10 ml) was added to the acidic solution. After the resulting solution was thoroughly mixed, ferrous chloride (2 moles) was added to form a mixture comprising ferric phosphate and ferrous phosphate at 20-30 degrees C. Lithium chloride (2 moles) was added to the resulting solution while it was thoroughly stirred. The resulting solution was titrated with acetic acid (99%) until the pH of the resulting solution was 5. The resulting solution was stirred continuously for complete dispersion. After 48 hours of continuous stirring, the dispersed solution was filtered using a polypropylene filter. A solid-state mixture comprising lithium ferric phosphate and lithium ferrous phosphate resulted. The solid-state mixture was washed with distilled water to remove contaminate. The resulting solid-state mixture, distilled water (600 ml), and magnesium oxide (0.02 mole) were placed into a ball mill jar and thoroughly milled and dispersed to form a semicrystalline nanoscale particle mixture in solution. The mixture was spray-dried to form a precursor. The precursor was placed in an aluminum oxide crucible, which was in turn placed in a furnace. Carbon powder was also placed in the furnace. The furnace was filled with an argon carrier gas. The temperature of the furnace was brought from room temperature to 800 degrees C using increments of 20 degrees C and maintained at 800 degrees C for 24 hours. In the furnace, carbon particles from the carbon powder were suspended in the argon carrier gas and mixed with the precursor to produce a composite material, Li 1.01Fe 0.98PO 4.0.012MgO/C, comprising a lithium iron (ferric) oxide phosphate matrix cocrystallized with magnesium oxide and an outer carbon coating. The material was an example of a material represented by Li(I)Fe(II)PO 4.MgO/C or LiFePO 4.MgO/C and simply as Li(I)Fe(II)PO 4.MgO/C or LiFePO 4.MgO/C.