|
|
Apophyllite-(KF) Mineral Data
|
|
|
General Apophyllite-(KF) Information
|
Chemical Formula: |
(K,Na)Ca4Si8O20(F,OH)•8(H2O) |
Composition: |
Molecular Weight = 760.47 gm |
|
Potassium 4.37 % K 5.26 % K2O |
|
Sodium 0.45 % Na 0.61 % Na2O |
|
Calcium 21.08 % Ca 29.50 % CaO |
|
Silicon 29.55 % Si 63.21 % SiO2 |
|
Hydrogen 0.01 % H 0.12 % H2O |
|
Oxygen 42.29 % O |
|
Fluorine 2.25 % F 2.25 % F |
|
- %
F -0.95 % -O=F2 |
|
______ ______ |
|
100.00 % 100.00 % = TOTAL OXIDE |
Empirical Formula: |
K0.85Na0.15Ca4Si8O20F0.9(OH)0.1 |
Environment: |
A secondary mineral in amygdules or druses in basalts. A late-stage mineral in some mineral deposits. |
IMA Status: |
Approved IMA 1978 |
Locality: |
Poona, Nasik, and Bombay districts, Maharashtra, India. Link to MinDat.org Location Data. |
Name Origin: |
From the Greek apophylliso - "it flakes off." and the composition containing fluorine; |
Name Pronunciation: |
Apophyllite-(KF) + Pronunciation |
Synonym: |
Fluorapophyllite - Renamed to Apophyllite-(F) by Mineralogical Record, v39, (2008), p 131 |
|