Reciprocal Net是一种分布式数据库，被研究晶体学的专家们用来存储分子结构信息；大部分的数据对公众开放访问。该项目仍处于开发阶段。目前，网上共有18个结晶学实验室参与该项目。这个项目是由美国国家科学基金会(NSF)资助并作为美国国家科学数字图书馆的一部分。这个集合的内容将主要来自结晶学实验室,为老师,学生和公众提供现代化学研究支持。Reciprocal Net的重点是让不同情况的数字图书馆用户查阅原子结构并对其进行了解和利用。
Reciprocal Net项目将构建和部署分子结构的分布式，开放，可扩展的数字馆藏。与馆藏相关的是软件工具，用于可视化，交互内容以及渲染内容的可打印图像；用于将本地数据库表示形式自动转换为可以全局共享的标准格式的软件；用于基于馆藏构建教育模块的工具和组件；以及此类模块的示例，例如基于该馆藏的教育资料公共存储库的开始。
该馆藏的内容主要来自参与晶体学实验室的结构，从而为教师，学生和公众提供了一种更好地与当前化学研究联系的方法。互惠网络的重点是获得对这几类数字图书馆用户普遍感兴趣和有用的结构。该馆藏将被完全整合到新出现的NSDL框架中，构成对各级教育都具有突出价值的资源。
The Reciprocal Net project will construct and deploy a distributed, open, extensible digital collection of molecular structures. Associated with the collection will be software tools for visualizing, interacting with, and rendering printable images of the contents; software for the automated conversion of local database representations into standard formats which can be globally shared; tools and components for constructing educational modules based on the collection; and examples of such modules as the beginning of a public repository for educational materials based on the collection.
The contents of this collection will come principally from structures contributed by participating crystallography laboratories, thus providing a means for teachers, students, and the general public to connect better with current chemistry research. The Reciprocal Net's emphasis is on obtaining structures of general interest and usefulness to those several classes of digital library users. The collection will be fully integrated into the emerging NSDL framework, constituting a resource of outstanding value for education at every level.