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Henmilite
A valid IMA mineral species
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About Henmilite
Image of Prof. Henmi and his daughter, Dr. Henmi
Formula:
Ca2Cu[B(OH)4]2(OH)4
Colour:
Blue-violet
Lustre:
Vitreous
Hardness:
1½ - 2
Specific Gravity:
2.51
Crystal System:
Triclinic
Name:
Named for Professor Kitinosuke Henmi (逸見 吉之助) (28 June 1919, Okayama City, Japan - 11 November 1997) and his daughter Dr. Chiyoko Henmi (逸見 千代子) (1949 – 2018), Department of Earth Science, Okayama University, in recognition of their work on skarn minerals from Fuka. The mineral chiyokoite is also named after Chiyoko Henmi.
A synthetic Sr analogue is known.
Unique Identifiers
Mindat ID:
1866
Long-form identifier:
mindat:1:1:1866:7
IMA Classification of Henmilite
Approved
IMA Formula:
Ca2Cu2+[B(OH)4]2(OH)4
Approval year:
1981
First published:
1986
Classification of Henmilite
6.AC.30
6 : BORATES
A : Monoborates
C : B(O,OH)4, without and with additional anions; 1(T), 1(T)+OH, etc
6 : BORATES
A : Monoborates
C : B(O,OH)4, without and with additional anions; 1(T), 1(T)+OH, etc
26.1.5.1
26 : HYDRATED BORATES CONTAINING HYDROXYL OR HALOGEN
1 : Monoborates
26 : HYDRATED BORATES CONTAINING HYDROXYL OR HALOGEN
1 : Monoborates
9.3.25
9 : Borates
3 : Borates of Ca and Sr
9 : Borates
3 : Borates of Ca and Sr
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Hen | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Fuka mine, Fuka, Bitchū, Takahashi City, Okayama Prefecture, Japan