
FOUNDATION OF S.F.M.C.
The French Society of Mineralogy and Crystallography (Société
Française de Minéralogie et de Cristallographie) was founded
on March 21st, 1878. Monsieur DES CLOIZEAUX, professor at the Natural History
Museum in Paris ( Muséum
d'Histoire Naturelle), took the initative to gather several
scientists at the Sorbonne,
sending them the following letter (here translated from the French):
| "Sir,
Some mineralogists conceived that it would be of interest to gather
once a month to converse about the recent scientific achievements that
may be of interest to mineralogy.
I thus have the honour to invite you to be on Thursday, March 21st,
at the Sorbonne, salle des Actes, staircase n°3, at 5 pm.
Yours faithfully"
A. DES CLOIZEAUX |
A. Des Cloizeaux
|
Out of 200 invited scientists, 43 replied to the invitation and straight
away registered as full members of the Society.
Among those, were Mr. RICHARD, THOULET, FOUQUE et LEVY. The denomination
of "Société Française de Minéralogie et de
Cristallographie" was agreed upon by all, and despite some temporary changes
since, this name remains unchanged since 1974.
INITIAL MOTIVES (after
a text by Jean WYART )
It may be useful to consider the motives of those mineralogists that
met in 1878, while they were already members of the French Geological Society
(Société Géologique
de France) that was founded in 1830 by some of those very people.
Mineralogy is a primordial science. In its largest acceptation, it
was considered as the part of Natural Sciences that dealt with the mineral
world, thus encompassing all of the Earth Sciences. Since the beginning
of times, human beings used minerals for tools, building materials, ornaments.
They became prospectors, minors, and acquired knowledge to find and dig
out the mineral materials they needed. Mining activity, including hundreds
of metres long drifts, is attested as far back as two thousand years ago
in various parts of the world and is evidence for a profound knowledge
of geology. Among the oldest documents, those of PLINUS the Elder, at the
beginning of the Christian Era, of MARBODE, XIth century, and of AGRICOLA,
at the beginning of the XVIth century, are entirely devoted to mineralogy.
However, until the end of the XVIIIth century, mineralogy only distinguished
about fifty minerals constituting the Earth crust (and some of them actively
sought after for their properties).
Type of Euclase from Haüy.
Crystal found by Dombez at the occasion of his journey
in South America, in 1779.
|
From a descriptive and practically oriented science, mineralogy evolved
towards a rigorous science when René-Just
HAÜY came up in 1781 with his theory on the structure of crystals.
He invented crystallography, describing crystals by using geometrical measurements
of dihedral angles between faces of crystals, as measured with a goniometer.
He defined mineralogical species as "une collection de corps dont les molécules
intégrantes sont semblables par leurs formes et composés
des mêmes principes unis entre eux dans le même rapport", that
is, in modern language, having building molecules [unit cells] of identical
geometry, and made of the same [chemical] constituents in identical proportions.
Using the goniometer, he could explain all the different morphologies displayed
by a same mineral. He contributed the description of many new mineral species.
At the same times, chemistry was developing rapidly and was also becoming
a quantitative science through the use of the balance and the discoveries
of LAVOISIER, PROUST, DALTON, or BERZELIUS, thus permitting precise chemical
analyses of minerals. |
| René-Just
HAÜY and an extract of his "Traité de Minéralogie"
(1801) - Plate III, showing the stacking of the "molécules intégrantes"
(concept of unit-cell) in a calcite crystal. |
|
| At the same times, chemistry was developing rapidely and was also becoming
a quantitative science with the use of the balance, and the discoveries
of LAVOISIER,
PROUST, DALTON, or BERZELIUS,
thus permiting precise chemical analyses of minerals.
Mineralogy was considerably enriched by the advances of crystallography
and chemistry. However, HAÜY's "hypothèse réticulaire"
( lattice hypothesis) was not unanymously accepted, and crystallographic
calculus was putting off many mineralogists and chemists.
At the beginning of the XIXth century, a quarrel opposed HAÜY and
BERZELIUS, who was rejecting HAÜY's theories of crystallography, and
considered that mineralogy was in itself a branch of chemistry, and could
not have other grounds than chemical.
Crystallography progressed with DELAFOSSE
and BRAVAIS.
The use of optical crystallography to identify minerals, by DES CLOIZEAUX
and others, also contributed to bring mineralogy from field work to laboratories. |
M. Bravais
M. Delafosse
|
This is the reason why some mineralogists and crystallographers came
to found our Society in 1878...
THE END OF THE QUARREL BETWEEN NATURALISTS
AND CRYSTALLOGRAPHERS
Mineralogy is at a cross-road between mathematics, physics, chemistry,
natural sciences and cosmology. The scientists who founded our Society
were divided into two "families": first the naturalists and petrographers,
led by FOUQUE, then by Alfred LACROIX; on the other side, crystallographers,
such as MALLARD, WYROUBOFF and DUFET, and standing between these groups
was DES CLOIZEAUX. It must be noted that the latter was not always successful
in conciliating the different views. Crystallographers in the old days
were more aggressive than the naturalists. Some of them displayed sharp
dihedral angles, and sometimes used of such undistinguished terms in their
manuscripts that these required minor corrections before publication...
Nevertheless, one of the fundamental characteristics of our Society
was the cordiality that was the rule among its members, the senior members
always being ready to help the beginners, and the latter always paying
proper respect to their elders. Because Science does not need personal
quarrels, we hope that this example from the SFMC founding fathers will
always inspire modern mineralogists.
THE BULLETIN DE MINERALOGIE
At the first meeting of the Society, a commission was created to organise
the publication of a monthly Bulletin. Its prime objective is "to establish
a link between all those who are interested in the progress of Mineralogy
and Crystallography".
The first issue of the "Bulletin de Minéralogie" reflects the
goal of the members of the Society to support an innovative and rigorous
vision of mineralogy. The first communication is by HAUTEFEUILLE, and reports
silica crystallisation by the dry method, reproducing quartz and trydimite.
At these times, several chemists were concentrating their efforts on mineral
syntheses by dry methods at high temperatures, and they were successful
in reproducing a large number of crystals.
But the importance of these studies was fully revealed only as FOUQUE
and LEVY succeeded in reproducing a large set of crystals naturally occurring
in volcanic rocks. Experiments involving the genesis of crystals in the
Earth interior are now common, and made easier by technological progress,
but it was not the case in 1880. It is also around 1880 that pioneering
work about isomorphism was published in the Bulletin. For instance, attention
was brought on polymorphism by MALLARD, in a communication entitled "De
l'action de la chaleur sur les substances cristallisées" (the action
of heat on crystalline materials). Following these seminal publications,
many others contributed to the renown of our Society.
The
Bulletin de Minéralogie ceased publication in 1989. Along with the
S.F.M.C., the D.M.G. (Deutsche Mineralogische Gesellschaft) and the S.I.M.P.
(Società Italiana di Mineralogia e Petrologia) renounced to their
national publications and launched the European
Journal of Mineralogy.