SCHALLER AND 
HILI.EBRAND. 
NOTES ON LAWSONITE. 
59 
The new pyramid y'=2 = {22l} is present on two crystals, the faces 
giving good reflections. Fig. 1 shows one crystal on which this form 
occurs. 
The new pyramid 6'=3 = {33l} is present on only one crystal and 
but one face of the form occurs. The relative size of the face is 
about the same as that of the preceding- pyramid. The reflection was 
fair. 
The braclrydomes are usually deeply striated, rendering it difficult 
to determine with certainty any domes present. On two crystals 
reflections were obtained from two faces, measurements of which 
agree with the angles calculated for the form {034}. The form is 
rather uncertain and is not included with the others. 
Measured. 
<J> P 
0° 23' 28° 07' — 14' 
0° 00 / 28° 07 / 
Calculated. 
0° 00' 28° 59' 
The combinations observed on the crystals measured are shown in 
the following table: 
Cryst. No. c b m d e r s 
1 
m 
d 
2 
b 
m 
d 
3 
m 
d 
4 
c 
h 
m 
d 
5 
b 
m 
d 
6 
c 
m 
d 
Fig. 5. — Lawsonite. 
The following table is a calculation of the two new forms corre- 
>onding to the tables given in Goldschmidt's Winkeltabellen. 
Io. 
Let- 
ter. 
Sym- 
bol. 
Mil- 
ler. 
<*>• 
p- 
f P . 
JJo- 
£• 
!?• 
X 
(Prism) 
(x:y). 
V- 
d= 
t(J p- 
o / 
o / 
o / 
o / 
o / 
O 1 
6 
r 
2 
221 
56 22 
69 27 
65 45 
55 54 
51 13 
31 14 
2.2204 
1.4770 
2.<;<>67 
7 
X 
3 
331 56 22 
1 
75 58 
73 17 
65 42 
5:; 53 
32 30 
3.3306 
2.2155 
4.0001 
