X, A, 1 Smith, Edding field, Fanning: Philippine Minerals 89 



KaUnite (alum)— K2SO,. Al2(SOJs+24H20. 



Kalinite occurs in mealy crusts around solfataras at Taal Vol- 

 cano and elsewhere ; apparently in small quantities. 



Kaolinite— AI2O3 .2Si02 .211^0. 



Kaolinite occurs in the Philippines usually as a solfataric 

 decomposition product of andesitic rocks; it is rarely pure. In 

 the region around Laguna de Bay, Luzon, it is found in irregular 

 "pockets." Kaolinite is used to a moderate extent in making 

 pottery and for a local paint, so-called "yeso," which is the 

 Spanish equivalent for gypsum. 



Labradorite — (See Plagioclase) . 



Leucite--KAl(Si03)2. 



Leucite occurs partially altered in certain very limited ex- 

 posures of volcanic rock in the Aroroy district, Masbate. These 

 rocks have from 8 to 10 per cent of potash, which might be made 

 available for fertilizer. 



lignite — Various hydrocarbons. 



Lignite is found in seams from 1 centimeter to 5 centimeters 

 thick in many parts of the Archipelago. It usually crumbles 

 into small cleavage cubes and air slacks. Its woody texture is 

 seen best in weathered specimens. This mineral has been mined 

 in the past, but there are no operations now. 



Limonite.— 2Fe203 .SH^O. 



Limonite is associated with hematite and is found near the 

 surface; it occurs also in small pisolitic granules. It is dis- 

 tributed in small amounts throughout the Archipelago. Some- 

 times limonite is used in small quantities for paint. 



Luzonite — CUjAsSi. 



Luzonite * is apparently a secondary ore of copper, and it is 

 a special form of enargite. It forms in vugs and cracks in 

 the vein. Luzonite is found in Mancayan, Mountain Province, 

 and constitutes a large percentage of the enriched portion of 

 the veins. 



Magnesite — MgCOg. 



Magnesite occurs associated with serpentine in Ilocos Norte 

 as a white, earthy mineral, which is efflorescent. No use is made 

 of it. 



1 Moses, Am. Journ. Sci. (1905), 277. 



