 | | Journal (article/letter/editorial) |
| 305 The Natrolite occurrence near Kinbane (White Head~, County Antrim. B y F. N. As~c~o~'T, M.A., F... T is impossible to determine when this natrolite occurrence was first discovered, but it has been known...this natrolite were offered to me, and I learnt t h a t they had been obtained from an occurrence on the...author is aware, there is no 9well-marked natrolite occurrence on the cliffs in the vicinity of the Causeway...of the mineral, similar in quality and mode of occurrence to those here described, have been obtained in |
 | | Report (issue) |
| South Gippsland 6 5 6 7 8 Eastern Northern Central Western THE ZEOLITE REGIONS OF VICTORIA CONTENTS...Haupt 6. Northern Victoria. By Bernard Day 7. Central Victoria. By Derrnot Henry 8. Western Victoria...have been deprived of any overall guide to the occurrence and characteristics of Victorian zeolites. Scattered...zeolite species; analcirne, chabazite, gonnardite, natrolite, phillipsite and thomsonite, have been found in...Newer Volcanic basalts of the Melbourne district. Natrolite and gonnardite invariably occur as an intergrowth |
 | | Journal (article/letter/editorial) |
| vol. 17, pp: 274-304. F. N. Ashcrof~, The natrolite occurrence near Kinbane (White Head), County Antrim...about 0.003. The mean refringence is near 1.487. Natrolite, mesolite, and seoleeite.--These three minerals...order listed, mesolite continuing the growth of natrolite at the extremity of the crystals, and scolecite...about 16 ~ In addition to the delicate tufts natrolite is not uncommonly found in the form of compact...aggregates of stouter crystals. In the Oarron area natrolite is inconspicuous in amount when compared with |
 | | Journal (issue) |
| Christopher W. Johnston and Roderick J. Hill Natrolite and Associated Secondary Minerals at Chimney Rock...orientation is described above, and (3) a black opaque central zone betw een the two outw ard facing cassiterite...a ry-F eb ru a ry, 1978 CRYSTALLOGRAPHY The occurrence of beautiful crystals from the Jabuti mine pre...cassiterite is indicated as the fine-ruled (gray) central portion. T he two faces shown are from the 5 {111}...when the effects of the space group on the form occurrence is considered, the basic crystallographic law |
 | | Journal (article/letter/editorial) |
| the occurrence of gyrolite in County Antrim: Min. Mag.,15,288-293 Ogrc). The natrolite occurrence near |
 | | Book |
| 2013). MALAWI Mount Malosa, Chilwa alkaline province, Zomba district. "Illite" is the name of a series...Discm•t•ries, /960--20/ 5 ONTARIO Bentley Lake Road occurrence, Faraday Township, Hastings County. In fall 1994...site which they called the Bentley Lake Road occurrence, south of Bancroft. Sharp, flattened rhombohedral...specimens have come from an unusual calcite vein-dike occurrence with an exposure very near, indeed on the property...itself 40 km northwest of Lac Saint-Jean in south-central Quebec, very large and sharp ilmenite Cl) 1stals |
 | | Book (edition) |
| Spectral XXli xxiii XXV Inclusions Luminescence Occurrence Stone Sizes Comments GEM XXV XXV XXV XXV ...large body of basalt that formed as a thick lava occurrence Chromium, however, is not of emerald, i...deposits); demands of the market. A gemstone occurrence is a very rare and transient geologic feature...They are not abundant, and are restricted in occurrence only to those localities where conditions were... well-formed crystals. An example of such an occurrence is the mineral brazilianite, which was described |
 | | Book (edition) |
| is 25) natrolite (Fig. OPTICAL 30 MINERALOGY with the planes of the nicols.1. The natrolite becomes...containing a small natrolite Fic. 25.—Testing the adjustments of the crosshairs with natrolite fragments. ...crystal. This is true in each of the four ‘Tf natrolite is not available, any crystalline material with...extinction. In 45° intermediate positions the natrolite will show maximum illumination. 4. Determining...The two most useful methods are the method of central illumination and that of oblique illumination. |
 | | Book (edition) |
| grains, or fragments are often scattered over the central portion of the slide and mounted without further...containing small elongated rectangular crystals of natrolite (Fig¬ ure 2-26) is useful to test the setting...crosshairs with the planes of the nicols.6 The natrolite becomes dark between crossed nicols when the edges...vibration directions. A slide containing a small natrolite crystal Fig. 2-26. Testing the adjustments of...placed upon the stage be¬ the crosshairs with natrolite frag¬ tween crossed nicols and turned until ments |
 | | Book (edition) |
| Zeolites: Analcime Heulandite Stilbite Erionite Natrolite Mesolite Thomsonite Scolecite Laun1ontite.• Chapter...fit on a table. The optical train follows the central vertical axis of the boxHke str1Jcture. The box...containing small elongated rectangular crystals of natrolite ( Figure 2-33) is useful to test the setting of...cross hairs ,vith the planes of the polars. 7 The natrolite becomes dark between crossed polars when the edges...containing a small natrolite crystal may be placed upon the stage ' If natrolite is not available, any |
 | | Book (edition) |
| be expanding; all matter is moving away from a central location. This led scientists to hypothesize that...formulas: marialite skutterudite clinohumite olivine natrolite montmorillonite Na 4(A1Si30 8) 3 Cl (Co,Ni)As3...unknown amount ofponstructural water is present. Natrolite, a zeolite, has H 20 in holes in its structure...O 8 hC1 Ca4 (Al 2Si2O 8 hCO 3 zeolite group natrolite chabazite heulandite stilbite sodalite Na 2Al...eralogy ►TABLE 57 3.7 Specific Gravity (G) and Occurrence for Si02 and Al 2Si05 Polymorphs Mineral Composition |
 | | Report (issue) |
| CARBONIFEROUS LAVAS • • . • • • • Field Occurrence, 123: Bath Lodge, 123. Carey River, 125. Murlough...showing distribution of Raised Beaches in the central and southern parts of Rathlin Island . . . . ....1) repeated Berger's statements and added an occurrence of limestone in the townland of Ballynagard which...the more micaceous members of this group is the occurrence of tourmaline. The best development occurs about...of porphyr oblastic albite and the sporadic occurrence of tourmaline. In thin section also it is usually |
