Meddelelser om Grønland . is often wanting. The structure of thefaces of the prismatic zone is as in thepreceding type. As to size and nature in general thisform is not different from the precedingone ; it has only been found in a singlepiece, and the accompanying combination Fig-3- llvaite, type ILof minerals deviated in no respects from the common 58 - 4L-y X ?4 ^j--^ -^ Fig. 4. IIvaite, type III. Type III is also in all essentials like the prin-cipal type. Only very few crystalshave been found, all from the samepiece ; the size is about 2. The most characteristic featureis that the cr
Meddelelser om Grønland . is often wanting. The structure of thefaces of the prismatic zone is as in thepreceding type. As to size and nature in general thisform is not different from the precedingone ; it has only been found in a singlepiece, and the accompanying combination Fig-3- llvaite, type ILof minerals deviated in no respects from the common 58 - 4L-y X ?4 ^j--^ -^ Fig. 4. IIvaite, type III. Type III is also in all essentials like the prin-cipal type. Only very few crystalshave been found, all from the samepiece ; the size is about 2. The most characteristic featureis that the crystals are highly com-pressed and plate-formed in the direc-tion -L on the 6-axis. Of the prismaticfaces s{120} is the only one com-monly found, while ?{210} is verynarrow or quite wanting; generally?6-{30l} is also wanting. /{041} ande{02l} are developed to almost thesame degree.
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectgeology, booksubjects
