A pure white blende from Franklin in New Jersey is known as cleiophane; snow-white crystals are also found at Nordmark in Vermland, Sweden.
An important character of blende is the perfect dodecahedral cleavage, there being six directions of cleavage parallel to the faces of the rhombic dodecahedron, and angles between which are 60 deg.
Crystals of blende are of very common occurrence, but owing to twinning and distortion and curvature of the faces, they are often rather complex and difficult to decipher.
Pribramite is the name given to a cadmiferous blende from Pribram in Bohemia.
Beautiful isolated tetrahedra of transparent yellow blende are found in the snow-white crystalline dolomite of the Binnenthal in the Valais, Switzerland.
A few varieties of blende are distinguished by special names, these varieties depending on differences in colour and chemical composition.
Lecoq Boisbaudran, in a specimen of blende from the mines of Pierrefitte, in the Pyrenees.
It is, however, found much more abundantly in a black blende from Bensberg, on the Rhine, one hundred thousand parts of this latter yielding one part of gallium.
This very rare metal was discovered by means of the spectroscope by Messrs Reich and Richter in a specimen of zinc-blende from Freiberg, in 1863.
The Pierrefitte blende contains one part of gallium in four hundred thousand.
The following is the process given by the authors:--The blende of Bendsberg is pulverised and then roasted in a Perret furnace, by which treatment the greater part of the indium is volatilised.
Fine crystals of large size have been found with quartz and chalybite in the mines at Neudorf in the Harz, and with blende and tetrahedrite at Kapnik-Banya near Nagy-Banya in Hungary.
At the original locality, Wheal Boys in the parish of Endellion in Cornwall, it was found associated with jamesonite, blende and chalybite.
Considerable quantities of blende were also met with, and strong indications of the existence of copper are furnished.
Any spar adhering to the ore, renders it refractory; blende and pyrites have the same effect.
Blende is found in great quantities in Derbyshire and Cumberland, as also in Cornwall.
But in every case where it is desired to have a very perfect roasting, as for blende from which zinc is to be extracted, for sulphuret of antimony, &c.
Lautenthal, in the Hartz, for roasting the schlichs of lead ores, which contain much blende or sulphuret of zinc.
Zinc is smelted in England, likewise from blende (sulphuret of zinc).
Regular intergrowths of crystals of totally different substances such as staurolite with cyanite, rutile with haematite, blende with chalcopyrite, calcite with sodium nitrate, are not uncommon.
If a surface is coated with Sidot's blende and held near a piece of radium nitrate, the coated surface begins to glow.
It is fitted with a lens focused upon a bit of Sidot's blende and radium nitrate, and in a dark room shows these beautiful scintillations "like a shower of stars.
For this purpose he had selected a key; but as the day proved to be cloudy he put the plate, with the key and pitch-blende resting upon it, in a dark drawer in his desk, and did not return to the experiment for several days.
Since pitch-blende contained uranium, or uranium salts, he surmised that a somewhat similar result might be obtained with the ore itself.
In the Missouri region, on the other hand, sphalerite and blende are the typical ores.
Galena and zinc blende frequently resemble one another, but they may be distinguished by this infallible sign: the powder of galena is black, and that of blende brown, or yellow.
The metal is obtained from zinc blende (which only contains it in very small quantity) by dissolving the mineral in an acid, and precipitating the gallium by metallic zinc.
The chief ore of lead is galena, a sulphide of lead, common in most mining districts, and frequently associated with blende and copper-pyrites.
How would blende compare with pyrites as a source of sulphur for sulphuric acid making?
A sample of blende is found to contain 55 per cent.
The ores are argentiferous galena, accompanied by considerable amounts of blende and pyrites, all oxidized near the surface.
It was possibly only furnace calamine, or perhaps blendefor it was associated with copper.
Zinc has been chiefly procured from superficial pockets of calamine in Santander and the neighbouring districts; but in the form of blende it is widely distributed in association with lead.
He went up to Despard's room and suggested that while they were waiting for supper they should examine the sample of pitch-blende they had taken from the mine.
After all, I'm responsible, for I made the discovery of pitch-blende and got the radium idea in my head.
They collected the pitch-blende they had found, and putting it into his handkerchief Despard dropped it into his pocket.
After six months of ceaseless work and research; of hope and despair, a rich strain of pitch-blende was discovered with radium emanations.
Just because we've found pitch-blende it doesn't mean there's radium.
Sometimes he had wondered whether the story Despard told him about the traces of radium in the pitch-blende had been an hallucination on his part.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "blende" in a variety of sentences. We hope that you will now be able to make sentences using this word.
