Krantz Catalog

"12. Identical to the previous crystal form with twinning (Fig. 198)."

From Physikalische Krystallographie

Mineral Name:   Albite (also Kumdykolite)

[see Model 10]

Color                               White, gray, blueish, greenish, reddish
Crystal system                  triclinic
Cleavage                          perfect on {001}, very good on {010}, imperfect on {110}
Fracture                           uneven to conchoidal
Mohs scale hardness        6 - 6.5
Luster                              Vitreous
Streak                             White
Specific gravity                2.61 - 2.63

Figure 197 - no wooden model in the collection



Models 10, 11, and 12 are all the mineral Albite.  I don't read German, but it appears from "Physikalische Krystallographie" that in Model 11 the angle between planes "c" and "b" is 86 degrees (likewise between "c" and "b", and other planes - check the figure).  I can't seem to make KrystalShaper draw planes open "upward".
Also, it seems that Model 12 is identical to Model 11 except for the twinning.  I tried to indicate this with the stripe to match the wooden model.   Notice that the stripe on the model is placed asymetrically.


KrystalShaper Applet

Figure 197

Eos image and webpage copyright 2013  M  Nealon