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Name and formula

Reference code:        00-025-0781

Mineral name:        Rectorite
Common name:        allevardite
PDF index name:        Sodium Aluminum Silicate Hydroxide Hydrate

Empirical formula:        Al4H8NaO26Si8
Chemical formula:        NaAl4 ( Si , Al )8O20 ( OH )4 ?2H2O


Crystallographic parameters

Crystal system:        Hexagonal
Space group:        P

a (?):          5.1300
b (?):          5.1300
c (?):         23.7650
Alpha (¡ã):         90.0000
Beta (¡ã):         90.0000
Gamma (¡ã):        120.0000

Calculated density (g/cm^3):          2.39
Volume of cell (10^6 pm^3):        541.63
Z:          1.00

RIR:        -


Subfiles and Quality

Subfiles:        Inorganic
        Mineral
        Corrosion
Quality:        Star (S)

Comments

Color:        White, yellowish gray, yellow
General comments:        Alternating illite and montmorillonite layers.
        Specimen on optical data from Kuli-Kolon, Tadzhik, USSR.
Sample source:        Specimen from Baluchistan, Pakistan.
Optical data:        A=1.533, Q=1.545, Sign=+
Additional pattern:        To replace 00-014-0183.

References

Primary reference:        Korolev., Sov. Phys. Crystallogr. (Engl. Transl.), 16, 250, (1971)
Unit cell:        Bayliss, P., Private Communication, 4, 19, (1989)

Peak list

No.    h    k    l      d [A]     2Theta[deg] I [%]   
  1    0    0    1     23.80000     3.709     100.0
  2    0    0    2     11.90000     7.423      65.0
  3    0    0    3      7.91000    11.177       1.0
  4    0    0    4      5.95000    14.877       1.0
  5    0    0    5      4.75000    18.666      10.0
  6    0    0    6      3.96000    22.433       2.0
  7    0    0    7      3.40000    26.189      16.0
  8    0    0    8      2.97100    30.054      16.0
  9    0    0    9      2.64300    33.889       2.0
10    0    0   10      2.37500    37.851       1.0
11    0    0   11      2.16400    41.705       1.0
12    0    0   12      1.97000    46.035      12.0
13    0    0   13      1.82700    49.874       4.0
14    0    0   15      1.58400    58.195       2.0
15    0    0   16      1.48400    62.540       1.0
16    0    0   17      1.44000    64.678       2.0
17    0    0   18      1.32200    71.278       2.0
18    0    0   19      1.25200    75.941       1.0
19    0    0   20      1.18800    80.842       2.0
   
   
Stick Pattern
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